Loading city report
Preparing San Ramon environmental records...
Review government records associated with San Ramon, California. Open a section to see source records, coverage and dates. These city-level results do not establish exposure at a home or identify your water provider.
Toxin Scout summarizes public records from government and public datasets. Data can be delayed, incomplete, approximate, matched at non-parcel levels, or have accuracy problems as a result of this product's beta status, so verify important findings against the linked source records.
Loading city report
Preparing San Ramon environmental records...
Counts describe the records shown, not a complete city inventory. Some sources include nearby locations.
Drinking water compliance, PFAS records, natural water body health, discharge permits, and water-quality monitoring records for San Ramon.
Public water-system records for San Ramon, CA from EPA SDWIS.
City of Pleasanton
PFAS above an official threshold detected in available EPA records.
Reviewed: active/open records as of Q1 2026
Purchased or imported water record · Serves 76,689 people
Dublin San Ramon Services District
No active drinking-water issues detected in EPA SDWIS.
Reviewed: active/open records as of Q1 2026
Purchased or imported water record · Serves 98,776 people
City of Hayward
No active drinking-water issues detected in EPA SDWIS.
Reviewed: active/open records as of Q1 2026
Purchased or imported water record · Serves 162,954 people
Data from EPA SDWIS
PFAS screening separates EPA UCMR5 drinking-water monitoring from nearby DoD PFAS investigation-site records; EPA samples shown are from Aug 2024 to Feb 2025.
Drinking Water PFAS Monitoring
EPA UCMR5 samples public water systems. These results are separate from nearby PFAS cleanup or investigation-site records.
10 PFAS sample results above EPA limits
Sample period: Aug 2024 to Feb 2025
UCMR5 results are sampled by public water system, not every household. Confirm your water provider before treating these as tap-water results for a specific address.
| Chemical | Concentration (µg/L) | EPA Limit (µg/L) | Sample date | Over Limit |
|---|---|---|---|---|
| PFOS | 0.0260 | 0.0040 | 2025-02-05 | Yes |
| PFOS | 0.0220 | 0.0040 | 2024-08-20 | Yes |
| PFHxS | 0.0220 | 0.0100 | 2024-08-20 | Yes |
| PFHxS | 0.0180 | 0.0100 | 2025-02-05 | Yes |
| PFOS | 0.0150 | 0.0040 | 2025-02-05 | Yes |
| PFOS | 0.0130 | 0.0040 | 2024-08-20 | Yes |
| PFOS | 0.0080 | 0.0040 | 2024-11-21 | Yes |
| PFOA | 0.0051 | 0.0040 | 2025-02-05 | Yes |
| PFOA | 0.0048 | 0.0040 | 2024-08-20 | Yes |
| PFOA | 0.0042 | 0.0040 | 2025-02-05 | Yes |
PFAS detections below EPA limits.
Nearby PFAS Investigation Sites
DoD records are nearby site investigations, not San Ramon drinking-water detections. Record names come from the source database and can be broad.
No DoD PFAS investigation records shown for this report.
Water Body Impairment (ATTAINS) city records are temporarily unavailable.
Reviewed: source records as of Q4 2025
Reviewed: source records as of 2026
Air quality data from EPA monitoring stations, facility emissions inventories, and area-level air-quality designations in this city.
Contra Costa County
Reported: Dec 2020
EPA national average is ~30 per million
According to EPA, a cancer risk of 30-in-1-million means that for every 1 million people continuously exposed to these air toxics over a 70-year lifetime, an estimated 30 may develop cancer from that exposure. This is in addition to cancer risk from all other causes.
Top local emission sources
Data from EPA AirToxScreen
Air Quality Nonattainment Areas city records are temporarily unavailable.
Berkeley- Aquatic Park
Annual mean: 0.5 ppm · EPA standard: 9 ppm
Reported: 2024
Annual mean: 21.5 ppb · EPA standard: 100 ppb
Reported: 2024
Annual mean: 9.8 μg/m³ · EPA standard: 9 μg/m³
Reported: 2024
Data from EPA AQS
Reviewed: source records as of Q4 2025
Contaminated sites, waste facilities, cleanup records, and industrial operations in this city.
Reviewed: source query run Nov 2026
Reviewed: source query run Nov 2026
Facilities with hazardous-waste handler records under RCRA in the reviewed 5-mile city-center search area. Active handler status is separate from air, water, or other ECHO compliance violations, which are shown in their own sections.
Active RCRA handler records in the reviewed city search area
No release reports shown in this group.
Reviewed: active/open records as of 2018
Data from EPA UST Finder
No MSHA mine or extraction site records shown for this report.
Contra Costa County, CA
Reported: Mar 2026
Contra Costa County is EPA Radon Zone 2 (moderate potential). EPA defines Zone 2 counties as having predicted average indoor screening levels between 2 pCi/L and 4 pCi/L.
Radon levels can vary from home to home, so EPA recommends testing the property to know its indoor level.
Flood-map status, chemical accident risk, nuclear facilities, pipeline incidents, and community health indicators in this city.
No FEMA flood-zone records shown for this report.
Health outcomes from County Health Rankings. Values shown alongside state and national averages.
Contra Costa County, CaliforniaPop. 1,156,966
Reported: Mar 2026
Premature Death
Poor or Fair Health
Poor Physical Health Days
Poor Mental Health Days
Adult Smoking
Adult Obesity
Air Pollution - Particulate Matter
Drinking Water Violations
Diabetes Prevalence
Life Expectancy
| Indicator | County | State | National |
|---|---|---|---|
| Premature Death | 5,388 | 6,373 | 7,972 |
| Poor or Fair Health | 13.5% | 15.8% | 14.2% |
| Poor Physical Health Days | 3.1 | 3.1 | 3.3 |
| Poor Mental Health Days | 4.6 | 4.7 | 4.8 |
| Adult Smoking | 9.6% | 8.8% | 15.0% |
| Adult Obesity | 24.3% | 27.8% | 34.0% |
| Air Pollution - Particulate Matter | 7.8 | 7.1 | 7.3 |
| Drinking Water Violations | 1 | 1 | N/A |
| Diabetes Prevalence | 9.1% | 10.8% | 9.6% |
| Life Expectancy | 81.6 | 79.9 | 77.6 |