Ladera Ranch Childhood Cancer: The Facts, and Where to Follow for Updates

Hey neighbors. If you have been hearing about the Ladera Ranch childhood cancer concerns and feeling worried, you are not alone. A lot of us are. I want to give you a calm, honest rundown of what is actually known right now, what is still an open question, and where you can follow along and help. No spin, no fear, just the facts and the resources.

Here is the short version: a group of concerned parents began gathering information after several self-reported cases of Ewing's sarcoma, a rare bone and soft tissue cancer, in local children over the past decade or so. No cancer cluster has been officially determined, and there is no confirmation yet that cancer rates here are higher than the rest of California. Parents have requested a state review and started asking reasonable questions about environmental factors, including pesticide use in the community. As of this week, the Orange County Agricultural Commissioner has opened a pesticide-compliance investigation and is coordinating with several county and state agencies.

Below is the fuller picture, plus the groups, forms, and free resources worth knowing about.

Please note: I am a local Realtor and a mom, not a doctor or a health official. The summary below is based on information shared by the residents leading this effort and on public reporting as of July 2026. Some of it may change as reviews continue, so please check the official sources and community groups directly for the latest.

Latest updates on Ladera Ranch childhood cancer

This is a fast-moving situation. Here is the latest, newest first.

October 23, 2026, the state rules a Ladera oil well was not properly sealed, a state audit request, a cancer assessment update, and a spraying deadline. This comes from the latest Ladera Health Watch updates, covering the past two weeks: new information about an abandoned oil well, a request for a state audit of environmental-health oversight, and conversations about statewide policy. Here is where things stand:

• The state has ruled that a Ladera Ranch oil well was not properly sealed. In September, CalGEM, the state agency that oversees oil and gas wells, revisited its earlier approval of the abandonment of O'Neill No. 1, an exploratory well drilled in 1920 near Citrus Lane. The agency confirmed the well had been plugged but found the work did not comply with state abandonment regulations; its September 18 letter states that "the plugging and abandonment of this well is not approved," replacing the state's previous approval from 2003, because the base of the plug intended to protect freshwater was not placed in the original wellbore as required. Ladera Health Watch had asked CalGEM to reevaluate the well in August after uncovering concerns in historical records, including undocumented cement encountered roughly 100 feet underground during work in 2002 and a warning that the well was not to be built over without further consideration. Important context: CalGEM's August 31 surface inspection detected no gas emissions, a September 17 memorandum concluded the well presents extremely low risk, and this finding does not mean the well is leaking, that groundwater is contaminated, or that anyone has been exposed. No connection has been established between the well and the illnesses reported in Ladera Ranch. The group has asked CalGEM to confirm the well's precise location (records place it approximately beneath a sidewalk in front of a residence), evaluate its underground barriers, and explain whether additional testing or corrective work is needed, who would be responsible, and when. The CalGEM memo and letter, a 1920-to-today timeline, and maps are on the group's new Abandoned Oil Wells page.

• A state audit of environmental-health oversight has been requested. When residents report unusual illnesses or possible environmental hazards, who makes sure important questions don't fall through the cracks? Ladera Health Watch submitted a proposal to Senator Catherine Blakespear's office asking the California State Auditor to examine how agencies investigate and respond to community environmental-health concerns. Her office has confirmed receipt and is reviewing it. No audit has been approved yet.

• Ladera's cancer assessment could be released soon. CDPH is assessing whether Ewing sarcoma and other cancers have occurred more often in Ladera Ranch than expected, using data through 2023, with results expected this fall. The group has asked whether childhood leukemia, earlier diagnoses, and all Ladera Ranch neighborhoods are included. The assessment may show whether rates are unusually high, but not what caused them, which is why independent environmental research remains so important. Updates are posted on CDPH's Ladera Ranch Cancer Concern page.

• Local concerns are turning into statewide policy conversations. The group met with Assemblymember Celeste Rodriguez's office about AB 638, proposed legislation on capturing and reusing urban runoff, and why public-health protections need to keep pace. Although AB 638 did not advance in 2025, they discussed future legislation, and a petition is being prepared asking the State Water Resources Control Board to consider stronger statewide safeguards. A gap found in one community may affect many others.

• Will Ladera start spraying again after November 14? LARMAC's temporary pause on Lifeline, Specticle G, and Atrimmec expires November 14, and these chemicals could return to community slopes unless the Board acts. Residents can attend the Board meeting on November 11 at 7 p.m. at Oak Knoll Village Clubhouse, or submit a written comment, asking LARMAC to extend the pause until a permanent policy is adopted, prioritize organic alternatives, and make pesticide use transparent.

Looking ahead: six months ago, residents began asking questions about an unusual number of rare childhood cancer diagnoses in the community. There is still no answer on whether environmental exposures played a role, but agencies are responding to requests, researchers are helping investigate potential exposures, and conversations about policy changes have begun.

October 7, 2026, landfill questions, Ewing sarcoma coverage from another community, new CSUF research funding, and the LARMAC election. This comes from the latest Ladera Health Watch weekly update. A few developments this week: questions about the proposed Prima Deshecha landfill expansion, a new story about another community reporting multiple Ewing sarcoma cases, additional funding for the Cal State Fullerton research underway in Ladera, and a notable jump in participation in the LARMAC Board election. Here is where things stand:

• Before the Prima Deshecha landfill expands, questions need answers. Orange County is considering raising the landfill's permitted daily intake from 4,000 to 8,000 tons per day, with up to 10,000 tons on certain emergency days, and the County's environmental review is ongoing. In March 2026, the South Coast Air Quality Management District raised concerns about the County's draft environmental review, including its reliance on older meteorological data, the omission of landfill flares and other stationary sources from the health-risk analysis (which AQMD said likely underestimated cancer and non-cancer risks to nearby sensitive receptors), and the absence of analysis of how the increase would affect landfill-gas generation and control capacity. Historical waste records raise additional questions, including an unlined closed landfill unit that accepted waste from 1973 to 1980 and roughly 3,350 tons of hydrocarbon-contaminated soil disposed at Prima in 1991. The group is clear that this history is not evidence of current contamination, but it is asking whether today's monitoring is designed to detect contaminants from those historical waste streams. Ladera Health Watch believes the final environmental review should resolve these questions, including impacts on nearby homes, schools, and other sensitive receptors such as San Juan Hills High School, before the County substantially increases the permitted tonnage. Read the full landfill update.

• Another community is asking many of the same questions. Spectrum News has published its story about families in Adams, New York, who have been trying to understand multiple Ewing sarcoma diagnoses in their area. The Spectrum News story reports at least six Ewing sarcoma cases in the southern Jefferson County area and follows families who have been pressing state and local officials for answers; it also discusses Ladera Ranch as another community confronting an unusual number of Ewing sarcoma cases. What struck the group most was how familiar the story sounds: families connect the cases themselves, begin asking questions, and then try to determine what level of evidence is necessary before a broader investigation occurs. Ladera Health Watch has been connecting with families in other communities because rare cancers are extraordinarily difficult to study one town at a time. No environmental cause of Ewing sarcoma has been established, but comparing cases and exposure histories across multiple communities using a consistent research approach could help identify questions or patterns that might otherwise be missed.

• LARMAC election participation jumped, so please vote. The LARMAC Board election is underway, with two seats open this year. On October 1, a resident monitoring the election participation number noticed that turnout increased from approximately 5.9% to 11.5% in a single afternoon. No one knows who cast those additional ballots, and the increase itself does not indicate anything improper, but it is a good reminder of why homeowner participation matters: concentrated apartment ownership represents a significant voting block in LARMAC elections, particularly when overall homeowner turnout is low. Regardless of which candidates you support, please vote. Online voting remains open until Friday, October 30 at 5:00 p.m., and results will be announced at the November 4 Annual Meeting. If you cannot locate your ballot or need assistance, the Inspectors of Election can be reached at LARMAC@tieivote.com or 888-211-5332.

• The Cal State Fullerton research received new funding. The independent environmental research underway in Ladera got an important boost this week: CSUF researchers received a Rapid Response Grant through the university's College of Health and Human Development to support their ongoing work in Ladera Ranch. The funding will provide additional resources for testing, equipment, and field work, giving the research team greater flexibility to expand the investigation as new questions emerge. The work is already proceeding in phases, and this additional support should allow the researchers to follow up on findings from initial sampling, historical records, and environmental pathways rather than being limited to the original testing scope. Updates will be shared as the research team is ready to release them.

Looking ahead: the group will continue supporting the expanded CSUF research, following the LARMAC election, working with families and researchers in other communities reporting unusual Ewing sarcoma patterns, and pursuing the other environmental questions under investigation in Ladera. As always, the approach is not to assume an answer before the evidence exists, but to identify the right questions, find the records and expertise needed to answer them, and make those answers available to the community.

September 22, 2026, CSUF testing is underway, school sampling is being pursued, and Ladera could become a model for safer community landscaping. This comes from the latest Ladera Health Watch weekly update, after another busy week behind the scenes. Here is where things stand:

• CSUF researchers now have samples from Ladera. Following LARMAC's approval of access earlier this month, the Cal State Fullerton research team has begun collecting preliminary environmental samples in Ladera. A clarification worth noting: this is independent academic research led by CSUF researchers. Ladera Health Watch helped connect the researchers, facilitate access, and provide background information, but the researchers determine the sampling methods, conduct the analysis, and interpret the results. The testing is exploratory and is not designed to prove that any environmental exposure caused cancer or other illness; if anything unusual is identified, it would need to be replicated, investigated further, and, where appropriate, confirmed through additional accredited testing. The goal right now is simple: start collecting real data.

• CSUF testing at local schools is still being pursued. The group previously asked Capistrano Unified School District to allow the CSUF team to conduct non-invasive environmental sampling at San Juan Hills High School, and the District initially directed the request through Orange County. The group has now returned to CUSD and is asking the Board of Trustees to authorize the university researchers to conduct the proposed sampling on District property. The work would be non-invasive and conducted outside school hours. Independent university testing can either identify something that deserves additional investigation or provide reassurance where concerns are not supported by the data. Either outcome is useful.

• Ladera Health Watch presented an update to the Ladera Ranch Civic Council. On Tuesday night, the group was invited to update residents at the Civic Council meeting on the work underway and the progress made over the past several months. Representatives from the offices of Assemblymember Kate Sanchez, Senator Catherine Blakespear, and Congressman Mike Levin were also present, another opportunity to make sure both residents and public officials understand where the various research, agency, and landscape-management efforts currently stand.

• Beyond Pesticides says Ladera could become the new model for organic community landscaping. The group met this week with Non Toxic Communities and Beyond Pesticides to continue working through the Organic Land Management Plan developed for Ladera Ranch. One of the most encouraging things heard: Beyond Pesticides intends to use the Ladera model going forward if the community is able to successfully adopt and implement the plan. For years, Irvine has been the community other cities and organizations looked to as an example of organic land management. A decade later, much more has been learned about how these programs work in practice, and the goal now is to use those lessons to create a stronger, updated model here in Ladera, one that other HOAs and communities could ultimately follow.

• The landscape advisory process continues. Following the Board's September 9 approval of the proposed landscape-management resolutions, work is now moving into the implementation phase. The next LARMAC landscape advisory committee meeting is tentatively expected around September 30, when the detailed work continues of turning the Board's commitments into an operational Organic Land Management Plan.

The bottom line: there is still a lot to work through, including slopes, weeds, pest thresholds, emergency treatments, notification, documentation, costs, and implementation, but this is exactly the process needed to build something that can last beyond the current pesticide pause.

September 17, 2026, testing begins in Ladera, LARMAC approves landscape resolutions, and new research doors open. This comes from the latest Ladera Health Watch weekly update, and it marks a real shift: in just a few months, this work has moved from residents raising concerns to actual testing, approved LARMAC landscape-management resolutions, and new research opportunities with major institutions. Here is where things stand:

• CSUF began preliminary testing in Ladera. On Sunday, Cal State Fullerton researchers began preliminary environmental testing in Ladera Ranch, an important first step toward gathering actual data from the community. CSUF's work is focused on environmental and community-health questions, including soil and water concerns, and will help inform what additional testing may be needed. The group is grateful to the CSUF team for taking these concerns seriously and beginning this work.

• LARMAC approved five landscape-management resolutions. A little over two months ago, residents showed up at a LARMAC Board meeting asking for reduced pesticide use and more transparency, and the only concrete next step was the creation of a resident advisory committee. This week, the LARMAC Board approved five landscape-management resolutions, including a defined path toward a comprehensive Organic Land Management Plan, created by advocates in partnership with Beyond Pesticides, to be brought back for Board consideration by the end of 2026. The approved actions include expanded areas where routine synthetic pesticide use will not be allowed, continued suspension of certain synthetic herbicides and plant-growth regulators while alternatives are evaluated, slope mapping, review of insecticide and rodenticide use, and improvements to pesticide notification and communication. This is not the finish line, but it is real progress.

• Ladera Health Watch submitted comments to DPR's Sustainable Pest Management (SPARC) process. This was the first time SPARC opened this process for public comment, and the group felt it was important that Ladera be included as a real-world example of how pesticides are used in HOA-managed residential communities. The comments asked DPR to look closely at how products are used near homes, sidewalks, parks, fields, paseos, schools, slopes, waterways, storm drains, and other common areas where families, children, and pets live and play, and to consider cumulative exposure, runoff, recycled-water pathways, notice, signage, buffers, restrictions, and safer alternatives when evaluating pesticides and pesticide policy. Ladera is not just one community asking for change; it is an example of a much larger gap in pesticide transparency and oversight for HOA-managed common areas.

• The National Cancer Institute opened a possible research pathway. Dr. Sharon Savage, Clinical Director of NCI's Division of Cancer Epidemiology and Genetics and Director of its Clinical Genetics Branch, responded to Ladera Health Watch and indicated that Ewing sarcoma families may be eligible for NCI's Cancer-prone Families Study, which may involve questionnaires, family history, medical records, blood or saliva samples, and potentially tumor specimens. This is not a Ladera cancer-cluster investigation, and it does not replace the California Cancer Registry review or environmental testing, but it may be an important research pathway for Ewing sarcoma families who want to understand whether their child's case can contribute to a broader rare-cancer and genetics study. The group is asking NCI for a virtual meeting so families can hear directly from the study team about eligibility, consent, privacy, tumor specimens, and what the study can and cannot answer.

• Each research lane answers a different question. CSUF is helping with environmental and community-health testing. CDPH and the California Cancer Registry are reviewing cancer incidence data. USC is helping examine pediatric cancer and Ewing sarcoma research questions. NCI may be able to help families through a rare-cancer, genetics, medical-records, and tumor-specimen study. Together, these pieces are beginning to create the more serious, coordinated research effort families have been asking for.

Where things stand: no one yet knows what caused the cancers reported by families in Ladera Ranch, but this week showed the work is moving. Environmental testing has begun, LARMAC approved meaningful landscape-management resolutions, state pesticide-policy comments were submitted, and NCI opened a possible research pathway for Ewing sarcoma families. There is still a lot ahead, but it is a long way from May, when residents first asked the California Cancer Registry to run an analysis.

Week of August 31, 2026, a longer pesticide pause, a new state cancer page, and front-page reporting. This comes from the latest Ladera Health Watch weekly update. First, mark your calendar: the LARMAC Board meets September 9 at 7 p.m. at the Covenant clubhouse, where a final proposed version of the organic land management plan is expected to go to the Board for a vote. Residents are strongly encouraged to attend. Here is what changed this past week:

• The pesticide pause is now 120 days. After concerns about a recent Specticle G application, members of the Landscape Advisory Committee asked LARMAC to stop further use and extend the existing pause. LARMAC extended the pause through November 14 and added Specticle G alongside Lifeline and Atrimmec. The group thanked LARMAC for listening to resident concerns and taking the matter seriously.

• Organic land management is moving forward. Ladera Health Watch has been working closely with LARMAC and Beyond Pesticides on the new land-management policy and on California's Sustainable Pest Management grant application, which could provide up to $1 million toward Ladera's transition. The submission deadline was Monday, September 1, and the group has been working to help LARMAC get the application finished and submitted in time.

• The state now has a dedicated Ladera Ranch cancer webpage. CDPH contacted Ladera Health Watch this week and shared the link to its new Ladera Ranch Cancer Concern webpage for the community. The page explains the state's ongoing cancer assessment and the separate pesticide review.

• Ladera made major news this week. The community was featured by the Los Angeles Times, the Orange County Register, and The Epoch Times, including front-page stories in both the Register and Sunday's LA Times. Ladera Health Watch worked closely with the reporters, providing background, records, documents, and sources. The Register focused on how the concerns raised in Ladera are now helping drive pesticide-reduction efforts across Orange County, a sign that the work happening here is beginning to have an impact well beyond the community. This attention matters because it is helping bring researchers, agencies, and other experts to the table so affected families and the broader community can get credible answers.

The bottom line: there is much more work to do, but things are moving. Thank you to everyone continuing to ask questions, share information, and support this effort.

Week of August 24, 2026, the proposed IPM program goes to LARMAC, a CalGEM well-integrity request, and the CSUF research team grows. This comes from the latest Ladera Health Watch weekly update. Here is where things stand:

• The proposed Integrated Pest Management program was presented to LARMAC on Monday, August 24. Members of LARMAC's Landscape Advisory Committee have been working on a stronger IPM program focused on prevention, soil health, nonchemical methods, transparency, and significantly reducing reliance on synthetic pesticides, and the group is continuing to advocate for a strong long-term policy for Ladera.

• Up to $1 million in state funding could help pay for the transition. California's Department of Pesticide Regulation currently has a grant opportunity unusually well aligned with what Ladera is trying to accomplish: projects can receive up to $1 million to develop and implement sustainable pest management approaches, with alternatives for weed management specifically identified as a funding priority. Ladera Health Watch sent the opportunity directly to LARMAC and offered to help pursue it so cost does not have to stand in the way of meaningful change. Details are on the DPR Sustainable Pest Management Grants Program page.

• The CSUF research team continues to grow. Dr. Jennifer Piazza is continuing to assemble a multidisciplinary team of researchers to help investigate environmental questions in Ladera Ranch. The team is currently waiting for written approval from LARMAC and Capistrano Unified School District before beginning preliminary soil and water testing, and in the meantime is connecting with additional researchers and experts who can help strengthen the work.

• CalGEM has been formally asked to reevaluate an abandoned well beneath the area. After obtaining historical well records and speaking with an expert, the group identified questions about whether a well in Ladera was abandoned in a manner that would meet today's standards. Ladera Health Watch formally asked CalGEM, California's oil and gas well regulator, to reevaluate the well's integrity and is seeking additional independent expertise to help determine whether inspection or environmental testing is warranted.

• Ladera Health Watch keeps growing. The group's new website went live this week, and its research, communications, and scientific network expanded. Outreach has also begun to families and advocates in other communities around the country where multiple Ewing sarcoma cases have been reported, with the goal of comparing experiences and looking for potential commonalities that could help inform future research.

• A neighborly note: noticing more dragonflies around Ladera this summer? Good. Keep them. Dragonflies are some of the hardest-working insects in a neighborhood like ours. One adult can eat dozens of mosquitoes a day, and the young spend months underwater eating mosquito larvae before they ever fly. They are also a water-quality signal: nymphs develop in ponds, creeks, and basins and are sensitive to what ends up in that water, so where they thrive, something is going right. And they do not sting or bite; if one hovers near you at the pool or on a trail, it is hunting, not bothering you. Please do not swat them, and please do not spray for them. Dragonflies, bees, and lacewings are free pest control already living here.

As always: the goal is to follow the evidence, ask the questions that need to be asked, reduce avoidable exposures where reasonably possible, and make sure Ladera Ranch receives the serious scientific and governmental attention these concerns deserve.

Week of August 17, 2026, CSUF researchers agree to begin environmental testing, CUSD extends its pesticide pause, and a potential $1 million state grant. This comes from the latest Ladera Health Watch weekly update, and it opens with big news: researchers at Cal State Fullerton have agreed to begin preliminary water and soil testing in Ladera Ranch, potentially within days. Here is where things stand:

• Cal State Fullerton researchers will begin environmental testing. The group met with a CSUF research team Thursday to begin developing a water and soil testing plan for Ladera, with the possibility of adding air monitoring as the work develops. Testing could begin as early as this week, depending on how quickly written approval comes through from Capistrano Unified and LARMAC to test schools and fields. The group is deeply grateful to the CSUF team for moving so quickly to help pursue answers.

• Capistrano Unified has extended its pesticide pause. At the Board meeting on Thursday, August 13, CUSD agreed to extend its pause on weed-control spraying until a new Integrated Pest Management plan is in place, with an emphasis on moving away from synthetic pesticides. The group presented findings from its public-records requests and asked the District to take a closer look at pesticide use at Ladera-area schools, particularly San Juan Hills.

• The Agricultural Commissioner's investigation continues. Ladera Health Watch spoke Friday with Orange County Agricultural Commissioner Jose Arriaga about the O'Connell pesticide complaint. Investigators are comparing application records with resident notices, including records the group provided going back to 2020, and can also consider firsthand witness testimony. The investigation is expected to continue into the winter.

• Recycled-water concerns were documented and reported. A member of the team spent last weekend documenting recycled-water conditions throughout Ladera and identified problems involving recycled-water identification, signage, and irrigation near public-use areas at multiple locations. The findings have been shared with LARMAC, along with a request to make the appropriate updates.

• State pesticide policy work continues. The group submitted public comment for the California Legislature's joint oversight hearing examining whether the state's pesticide program is adequately protecting the public, and conversations continue with advocates and legislators about stronger protections and reducing reliance on higher-risk pesticides, particularly where children live, learn, and play.

• A potential $1 million state grant could help fund Ladera's organic transition. One of the biggest pushbacks to Ladera going organic is the potential difference in cost, and the group has found a possible way to bridge that gap. The California Department of Pesticide Regulation currently runs a Sustainable Pest Management grant program specifically funding projects that move communities toward safer pest-management practices, including alternatives for weed and rodent management, adoption of safer, sustainable IPM practices, and reducing pesticide impacts on public health and the environment. Projects can receive between $100,000 and $1 million. Ladera Health Watch spoke directly with Jordan Weibel, DPR's Sustainable Pest Management Grants Program Lead, who confirmed that Ladera appears to be a strong fit for the program and discussed how LARMAC could participate in an application. The grant information has already been provided to LARMAC with encouragement to apply. The deadline is September 1, so the window is short, but possible.

The bottom line: residents have been asking LARMAC to make Ladera a model for safer land management, and there is now potentially up to $1 million in state funding available to help make that happen without placing the full cost on homeowners. The group hopes LARMAC takes full advantage of it and has offered to help however it can. Thank you to everyone who continues to send records, share information, and help move this work forward.

Week of August 10, 2026, cancer registry timing, a school-district pause, and two state resolutions moving forward. This comes from the latest Ladera Health Watch weekly update. A lot of this week's news is pesticide related, with several government processes now moving at once. Here is where things stand:

• Cancer Registry results are now expected this fall. The community had hoped to have the California Cancer Registry analysis sooner, but CDPH has indicated the results are now expected sometime this fall. Those results will help determine whether government agencies move forward with additional investigation and environmental testing. In the meantime, the group is working on a plan for carefully designed independent environmental testing so the next several months are not lost simply waiting.

• Capistrano Unified has implemented a 60-day pause. Trustee Lisa Zollinger let the group know directly that CUSD would be pausing routine landscape-maintenance products and weed-control spraying for 60 days while the District evaluates alternatives. The group also received its public-records production from CUSD, which includes pesticide-use records showing what products were used and in what amounts throughout the District. Those records are under review ahead of the CUSD Board meeting on Thursday, August 13.

• Two state resolutions are now moving forward, after months of meetings with elected officials, with thanks to Assemblywoman Kate Sanchez and her colleagues for turning that concern into concrete legislative action. HR 129, authored by Assemblywomen Sanchez, Laurie Davies, and Diane Dixon, would formally recognize July as Sarcoma Awareness Month in California and emphasize the need for greater awareness, research, and clinical resources; it has already cleared the Assembly Rules Committee. AJR 35 goes much further: it calls for federal research into environmental cofactors and potential triggers of Ewing sarcoma, asks California agencies to establish a scientific partnership to improve access to epidemiological data, and urges funding for research into chemical exposure pathways and localized cancer-cluster dynamics in South Orange County. It is currently before the Assembly Health Committee.

• California held a pesticide oversight hearing on Tuesday, August 11. Senator Catherine Blakespear co-chaired a joint Senate and Assembly hearing titled "Putting Public Protection First: Is California's Pesticide Program Achieving its Purpose?" The hearing was livestreamed, and the recording is available on the Assembly's hearings page.

• The OC Agricultural Commissioner is investigating four pesticide complaints in Ladera. Agricultural Commissioner Jose Arriaga confirmed this week that his office is actively investigating four separate allegations of pesticide misuse in Ladera Ranch. Anyone with photos, videos, or other evidence of possible notice, posting, or application violations that has not already been sent in can send it to the Commissioner's office directly, or email laderahealthwatch@gmail.com for help. This is a good time to make sure anything relevant gets into the appropriate hands while the investigations are active.

• A draft Ladera IPM policy is ready for expert review. The group has developed a draft Integrated Pest Management policy designed to move Ladera toward an organic-first, least-toxic landscape program, and it is circulating this week among organic and IPM experts before recommendations are finalized. LARMAC has confirmed that Lifeline and Atrimmec are the two products currently paused. Resident representatives are still needed from each of Ladera's 17 sub-associations so the transition does not stop at LARMAC-maintained property; email laderahealthwatch@gmail.com if you can help.

Also continuing behind the scenes: work on independent testing for water, air, and soil, cancer research, environmental records, and a legislative proposal for greater public access to California cancer data.

Week of August 3, 2026, clearer details on the state cancer review, and an organic policy takes shape. This comes from the latest Ladera Health Watch weekly update. Much of the week focused on getting clearer information from public-health agencies, coordinating the many government offices now involved, and building the substance of a long-term organic land-management policy for Ladera Ranch. Here is where things stand:

• New details from the California Department of Public Health. CDPH confirmed that the California Cancer Registry's analysis is geographically focused on Ladera Ranch and will use cancer-registry data through 2023, with completion currently estimated for fall 2026. The registry has identified fewer than 11 cases of Ewing sarcoma in Ladera Ranch between 1999 and 2023 (confidentiality rules prevent a more precise number). CDPH also clarified that its earlier review looked at Orange County as a whole and was not designed to identify a localized or emerging pattern within Ladera Ranch.

• An important caveat on that review: it can help determine whether the number of diagnosed cancers appears higher than expected, but it cannot determine whether an environmental exposure caused the cancers. That is why the environmental review work continues alongside it. The group is also developing potential university research projects for the fall and continuing conversations with researchers and childhood-cancer advocates about the need for better data.

• Government offices from the local level to the federal level are now receiving weekly updates directly from Ladera Health Watch, so everyone is working from the same information. Communication continued this week with the offices of Supervisor Katrina Foley, Assemblymember Kate Sanchez, Senator Catherine Blakespear, and Congressman Mike Levin. Congressman Levin's office expects a briefing from CDPH and is following up with the EPA, and Supervisor Foley's office is encouraging federal involvement and requesting clearer public information from the California Cancer Registry about its review.

• A dedicated water research group has been organized, and the drinking-water and infrastructure records obtained so far have been centralized. The group will help identify gaps in the available information, determine what additional records to request, and evaluate what forms of independent testing may be useful. Work also continues on organizing information about pesticide use, historical land use, nearby environmental sites, and other potential exposure pathways.

• Ahead of the August 4 LARMAC landscape advisory meeting, the group worked on the framework for a formal Organic Land Management policy, rather than relying on a general promise to become organic first. After consulting with people experienced in organic landscape transitions in other California communities, one message was consistent: a successful transition takes more than swapping one chemical product for another. The policy would make organic practices the standard, require documentation and approval of exceptions, provide public disclosure of pesticide use, and create ongoing independent oversight, with a phased plan covering turf, planter beds, slopes, medians, irrigation, soil health, and plant selection. Some changes, like ending routine herbicide use, can happen quickly. Broader soil restoration and any landscape redesign will take longer.

What comes next: the August 4 LARMAC advisory meeting, continued drafting of the Organic IPM policy for expert review, follow-up after the anticipated CDPH briefing, further development of the proposed university research projects, and continued organizing of water, pesticide, and environmental records.

July 28, 2026, first advisory committee meeting with LARMAC. The resident advisory committee held its first meeting with LARMAC. This is an advisory group, not a decision-making board, and any final plan still goes to the LARMAC Board for a vote. The resident members at the meeting were Dustin Matteson, Taryn Morais, Nubia Krikorian, and Tiffany Kahnen, and meeting minutes will be posted publicly. Here is where things stand:

• LARMAC has said it is willing to implement an organic-first policy and will allow the group to bring an organic consultant of its choosing to the next meeting, scheduled for Monday, August 4. Once an organic plan is in place, it will be presented to the Board for a vote.

• The original 60-day pause covered only two herbicides. LARMAC has indicated it will also reduce certain pesticides and rodenticides in August, with the finalized list to be posted on Ladera Life.

• The Board declined to put the landscaping contract out to bid, citing its long relationship with O'Connell. Residents are advocating for a competitive bid.

• Residents pushed for greater transparency and clear physical signage wherever synthetic chemicals are applied, visible enough that children playing outside know to avoid the area.

• The goal is to finalize a plan before the next Board meeting on September 9 so it can go to a vote, though the financials and phasing may take longer.

• Important: any agreement would apply only to LARMAC-managed property, not schools, commercial properties, or the 17 sub-associations. If you live in a sub-association, check with neighbors to learn which HOA manages your area and what products are used.

Also new this week, a school-district pause and a second petition. Capistrano Unified School District has implemented its own 60-day pause on the routine use of landscape maintenance products and weed-management spray applications while it evaluates alternatives, and this applies to all schools in the district. Separately, residents have launched a second petition (the first asked Ladera to go Non-Toxic) calling for an independent audit of tax-funded agencies and of the 25-plus-year contract between LARMAC and O'Connell. Organizers say this petition is open to anyone in California.

July 21, 2026, community town hall at Ladera Ranch Middle School. More than 400 residents packed a town hall about the childhood cancer concerns. Assemblymembers Sanchez and Dixon spoke, along with Supervisor Katrina Foley and representatives from Senator Catherine Blakespear's and Congressman Mike Levin's offices, making this a bipartisan effort. Organizers said they are pushing for legislation to fix pesticide transparency problems in Orange County and possibly statewide, working to secure independent water and soil testing in Ladera Ranch, and hoping to lay the groundwork for a broader epidemiological study. They are also asking LARMAC to extend its 60-day pause on routine synthetic chemical use indefinitely and to adopt an organic-first Integrated Pest Management policy. One father spoke about losing his daughter to a rare cancer, a reminder of why so many families keep showing up. Supervisor Foley said she has renewed her request for the California Department of Public Health to investigate, after an earlier request did not move forward, and noted the review falls under state jurisdiction.

Orange County Agricultural Commissioner opens a pesticide investigation. The Commissioner's office has opened a pesticide-compliance investigation and is coordinating with state and county agencies. U.S. Attorney Bill Essayli has also asked the EPA to look at possible environmental factors. Full details are in the section below.

First Landscape Pest Management Advisory Committee meeting is this week. Six residents have volunteered to serve and help build an organic-first program with real transparency about what products are used, where they are applied, and in what amounts.

What we know about the Ladera Ranch childhood cancer cases

Here is a plain, careful summary of what the parents leading this effort have shared.

The concern started with self-reported cases of Ewing's sarcoma in Ladera Ranch children, with diagnoses reported in 2013, 2017, 2021, 2022, 2023, and 2024. The four years in a row stood out to parents. Since then, two more self-reported Ewing's cases have come forward, one from 2007 and one from slightly before that (without a confirmed diagnosis date). Families have also shared many other stories of cancer in both residents and pets.

Ewing's sarcoma is very rare. According to the American Cancer Society, only about 200 to 240 children and teens are diagnosed with it in the entire United States each year, which is part of why these reports caught parents' attention.

In May, a resident contacted the California Cancer Registry and requested an analysis. That process can take several months, and the community is still waiting for results. While waiting, parents began looking into possible environmental factors, including water, pesticides, soil, landfill proximity, infrastructure, and school grounds.

Here is the same information at a glance:

Question	What has been reported (as of July 2026)
What cancer started this?	Ewing's sarcoma, a rare bone and soft tissue cancer
Reported Ewing's cases	Diagnoses in 2013, 2017, 2021, 2022, 2023, 2024, plus two earlier self-reported cases (2007 and slightly before)
How rare is Ewing's?	About 200 to 240 U.S. cases per year in children and teens
Official cluster confirmed?	No. None has been determined.
Rates higher than California?	Not confirmed either way. A state review was requested in May and is pending.
Known cause?	No. There is no known environmental cause of Ewing's sarcoma.
What parents are looking at	Water, pesticides/herbicides, soil, landfill proximity, infrastructure, school grounds
Official investigation opened?	Yes. The OC Agricultural Commissioner opened a pesticide-compliance investigation in July 2026.

What is still unknown

The honest answer is that no cause has been determined, and no cluster has been confirmed.

This is the part I want to be very careful about, because it matters and because the parents leading this have been careful about it too. No cancer cluster has been officially determined in Ladera Ranch. There is not even confirmation yet that cancer rates here are higher than in the rest of California. There is no known environmental cause of Ewing's sarcoma, and no one is accusing any single person, product, or company of causing cancer. What is happening is that concerned parents heard these reports, decided to gather information, and are asking reasonable questions while they wait on a state review.

Is the Ladera Ranch childhood cancer situation a confirmed cluster?

No, and the word "cluster" has a specific meaning worth understanding. Health agencies use "cancer cluster" for a greater-than-expected number of the same cancer, in the same group of people, in the same area, over a set period. Confirming one takes careful statistical review, and formal cluster findings are actually very rare under the federal definition. Right now this is best described as a group of concerning self-reported cases that parents are looking into, not a confirmed cluster. That distinction is not meant to minimize anyone's worry. It is simply where things honestly stand today.

The pesticide question and LARMAC

While looking into possible exposures, many residents have raised questions about pesticide, herbicide, rodenticide, and landscape chemical use in the community.

Based on notices and records reviewed so far, residents say Ladera appears to have regular common-area applications, and they have asked LARMAC for records, better notice, clearer signage, and a stronger Integrated Pest Management (IPM) policy. Parents have also pointed to Capistrano Unified records indicating that Cheetah Pro, an herbicide containing glufosinate-ammonium, was applied at several Ladera Ranch school sites in 2026, and they have filed a public records request with CUSD to learn more about what was applied, where, when, and what notice was given.

In response to residents' concerns, LARMAC announced a 60-day pause on the routine use of certain pesticides and herbicides while it reviews its landscaping practices. LARMAC has described this as a precautionary step and has not suggested the chemicals are linked to the reported cancer cases. Residents are now asking the Board to extend that pause indefinitely.

At the LARMAC Board meeting on July 8, the Board agreed to form an advisory committee to address the issue, expected to include resident members and LARMAC representatives. Six residents have volunteered to serve, and the first Landscape Pest Management Advisory Committee meeting is set for this week. The stated goal is to work constructively toward an organics-first IPM approach, similar to the program used in Irvine, with better transparency, better notice, and reduced reliance on nonessential chemical applications where children and families live, walk, and play. You can view LARMAC's current spray notice page here: LARMAC Integrated Pest Management.

A note on tone from the parents leading this: the LARMAC Board members are our neighbors, elected volunteers who live here too. The organizers have asked, and I want to echo it, that no one send angry messages to Board members. The goal is reasonable questions and reasonable changes, working together, not blame.

An official investigation has now opened

Update: the Orange County Agricultural Commissioner's office has opened an investigation into pesticide-related concerns in the area.

In a written response to residents, the Agricultural Commissioner's office said it has opened an investigation into pesticide-related elements within its jurisdiction and is working with the California Department of Pesticide Regulation (DPR). It has also begun coordinating with the Orange County Health Care Agency, the California Department of Public Health, and the Cancer Registry of Greater California.

As part of that review, the office said it is evaluating the California Department of Food and Agriculture's (CDFA) emergency Huanglongbing (HLB) and Asian Citrus Psyllid (ACP) pesticide program activities conducted in Ladera Ranch (ZIP code 92694) to verify compliance with pesticide laws and regulations. The office noted this review was initiated in response to a May 5, 2026 letter to Senator Catherine Blakespear, which was forwarded by the office of Orange County Supervisor and Vice Chair Katrina Foley.

Separately, Supervisor Katrina Foley has said she renewed her request for the California Department of Public Health to investigate the reported cases, after an earlier request roughly a year ago did not move forward, noting that this kind of review falls under state jurisdiction. U.S. Attorney Bill Essayli has asked the Environmental Protection Agency to look into possible environmental factors. The resident leading the local effort has also been asked to meet with

Supervisor Foley and Senator Blakespear in the coming weeks. There is still a long way to go, but the community's persistence is moving things forward.

One important thing to keep in mind: this investigation is focused on pesticide compliance, not a finding that pesticides caused any illness. No cause has been established. It is a meaningful step toward getting real answers.

Resources: how to follow, get a free reading, and help

Here are the practical resources being shared in the community right now.

Follow for updates. These two local Facebook groups are the best source of real-time information, meetings, and next steps:

• Ladera Health Watch

• Non Toxic Ladera Ranch

Volunteer. If you would like to help with records requests, research, outreach, and organizing, the parents leading this have a sign-up form. They have noted there is nothing specific to do right now, but they will contact people on the list as needs come up.

Free EMF reading from SDGE. If your home is under the power lines or next to a tower, Ryan Keithley with SDGE will come out for free to give your home an EMF rating. His contact is

(619) 676-5308 or rkeithle@sdge.com.

Official data. For public health questions and cancer data, the Orange County Health Care Agency and the California Cancer Registry are the official points of contact.

In the news. For outside coverage of the story, see FOX 11's report Ladera Ranch families demand answers as concerns grow over rare cancer cases and KTLA's OC residents demand answers on child cancer cases.

A note from a neighbor

I live here, I am raising my kids here, and I love this community. Sharing this is not about scaring anyone. It is about making sure the people who live here have clear facts and know where to find real information and real help. The parents leading this are doing careful, thoughtful work, and the least the rest of us can do is stay informed and support them.

If you found this helpful, please share it with another Ladera Ranch family so they know where to follow too.

Frequently asked questions about the Ladera Ranch childhood cancer news

What kind of cancer started these concerns in Ladera Ranch?

Ewing's sarcoma, a rare cancer that forms in bones or the soft tissue around them. It mostly affects children and teenagers and is diagnosed in only about 200 to 240 young people nationwide each year, which is why the self-reported Ladera Ranch cases drew attention.

How many Ladera Ranch children have been diagnosed?

Parents have shared self-reported Ewing's diagnoses in 2013, 2017, 2021, 2022, 2023, and 2024, plus two earlier cases (one in 2007 and one slightly before). These are self-reported, and no official count or cluster has been confirmed.

Is the Ladera Ranch childhood cancer caused by pesticides?

There is no confirmed cause, and there is no known environmental cause of Ewing's sarcoma. Residents have raised questions about pesticide and herbicide use and are gathering records, but nothing has been proven and no one is accusing any product or company of causing cancer.

Has a cancer cluster been confirmed in Ladera Ranch?

No. No cluster has been officially determined, and it is not yet confirmed that cancer rates here are higher than the rest of California. A review was requested from the California Cancer Registry in May 2026 and is still pending.

Who is investigating the Ladera Ranch pesticide concerns?

The Orange County Agricultural Commissioner's office has opened a pesticide-compliance investigation and is working with the California Department of Pesticide Regulation, the Orange County Health Care Agency, the California Department of Public Health, and the Cancer Registry of Greater California. Supervisor Katrina Foley has renewed her request for the state to investigate, and the U.S. Attorney has asked the EPA to look into possible environmental factors. These reviews look at compliance and possible causes, not a finding that pesticides caused any illness.

How can I stay updated or help?

Follow the Ladera Health Watch and Non Toxic Ladera Ranch Facebook groups for updates and meetings, and fill out the volunteer form if you want to pitch in. If your home is under power lines or next to a tower, you can also request a free EMF reading from SDGE.

Should families be worried about living in Ladera Ranch?

That is a personal decision, and it is understandable to have questions. What I can offer is that no cause and no cluster have been confirmed, careful people are looking into it, and the most useful thing you can do is stay informed through the community groups and official agencies rather than rumors.

Staying informed on Ladera Ranch childhood cancer

Thank you for reading and for caring about our community. The most helpful thing any of us can do right now is stay informed on the Ladera Ranch childhood cancer concerns, follow the parents close to it, and help where we can. Please follow the community groups, consider the volunteer form, request your free SDGE EMF reading if you live near the towers, and share this with any neighbor who needs it. I will keep this post updated as I learn more. You can find more Ladera Ranch community posts on my blog anytime.