County OKs wide-ranging studies into Tijuana River sewage crisis, asks state for $50M to tackle pollution
San Diego County supervisors unanimously approved linked public-health and economic studies on Sept. 9, 2025, to document harms from the Tijuana River sewage crisis and support targeted infrastructure upgrades and state funding requests for affected communities.
Key takeaways
- Board action: Unanimous approval on Sept. 9, 2025, to launch public-health and economic impact studies — sources: The Coronado News, KPBS.
- State funding request: Supervisors will ask California for $50 million for targeted Tijuana River Valley projects — see The Coronado News, Voice of San Diego.
- Health focus: Epidemiological research will examine chronic exposures, including hydrogen sulfide near a hotspot by homes and schools — briefing: YouTube briefing, reporting: KPBS.
Main story
What the board approved and why
The San Diego County Board of Supervisors voted to launch two linked studies: an epidemiological public-health investigation and an economic impact assessment. Supervisors said rigorous scientific evidence is needed to quantify harms from decades of transboundary pollution and to bolster requests for state and federal funds. This action builds on the county’s five-point Sewage Action Plan, which emphasizes eliminating toxic hotspots, protecting children and schools, supporting health studies, gathering economic data and appointing a crisis commissioner — background reporting: The Coronado News, inewsource.
Public health study: measuring exposure and harms
Focus: Epidemiologists will concentrate on residents near the Tijuana River hotspot where airborne contaminants and sewer gases — including hydrogen sulfide — have been detected. Officials emphasize measuring chronic exposure and linking pollutant levels to health outcomes such as respiratory illness.
San Diego State University researchers described the studies as “long overdue” and urged rigorous, defensible data to guide medical and policy responses — briefing available: YouTube briefing, reporting: KPBS.
County staff will collaborate with public-health experts to design studies capable of detecting acute events and chronic trends. The board highlighted special protections for vulnerable populations, including children at nearby schools. Anticipated data collection methods include air monitoring, health surveys and review of medical records where privacy rules permit — more: The Coronado News.
Economic impact study: counting the costs
Scope: The economic assessment will quantify how frequent beach closures, foul odors and visible pollution affect small businesses, property values and regional tourism. Officials want clear dollar figures to support compensation claims, mitigation funding and infrastructure investment.
Study leaders will analyze historical tourism data, business receipts, property sales and cleanup costs to produce evidence-based estimates of revenue losses and drops in property values. The county intends to use those figures when requesting state and federal support — reporting: The Coronado News, Voice of San Diego.
Infrastructure and toxic-gas mitigation plans
The board approved redirecting some design funds away from the planned “Gateway to the Californias” regional park toward urgent mitigation at Saturn Boulevard — a identified hotspot where turbulent flows may aerosolize sewage-related compounds. County officials said park construction will not proceed until the Saturn Boulevard hotspot is addressed to reduce aerosolization and exposure risks for nearby neighborhoods and schools — reporting: KPBS, The Coronado News.
State funding request and federal advocacy
At the motion of Supervisor Paloma Aguirre, the board agreed to formally ask the State of California for $50 million to pay for hotspot cleanups, infrastructure upgrades, monitoring and community support in the Tijuana River Valley — reporting: The Coronado News, Voice of San Diego.
The board also weighed hiring a federal lobbyist for about $100,000 to press Congress and federal agencies for binational cleanup initiatives; supporters argue federal investment is necessary because much pollution originates across the border from unregulated discharges in parts of Tijuana — analysis: Voice of San Diego.
Policy context and history
The Tijuana River sewage crisis has produced recurring beach closures, shoreline debris and persistent odors across the South Bay. Environmental-justice concerns have been emphasized repeatedly, noting that lower-income communities frequently bear the worst impacts — state context: California State Lands Commission. The board’s actions follow earlier county moves to adopt a Sewage Action Plan and expand emergency measures for hotspots — reporting: inewsource.
Voices from experts and residents
San Diego State University public-health researchers welcomed the studies as a necessary step to identify long-term impacts on children and adults. Community groups and South Bay residents have long demanded stronger measures and more funding, citing harm to livelihoods and restricted safe access to beaches — reporting: The Coronado News, YouTube briefing.
Implications for San Diego
Economic: Hard evidence of losses could speed relief to local businesses, restaurants and tour operators harmed by beach closures and odors — reporting: The Coronado News, Voice of San Diego.
Political: The unanimous vote indicates cross-partisan pressure to act; securing state or federal funding could elevate infrastructure investment as a central local issue ahead of future election cycles.
Social and cultural: Hotspot mitigation, school protections and monitoring could better protect low-income and marginalized communities and preserve beach access — a core element of San Diego’s cultural identity and recreation economy — context: KPBS, California State Lands Commission.
Next steps and oversight
County staff will return to the Board with detailed study designs, budgets and timelines. The board signaled it will involve community groups and public-health experts in study oversight. Final funding decisions and contract awards are expected in the coming months as the county moves from research to remediation — reporting: The Coronado News, KPBS.
