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Review government records associated with San Luis Obispo, 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.
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Preparing San Luis Obispo 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 Luis Obispo.
Public water-system records for San Luis Obispo, CA from EPA SDWIS.
San Luis Obispo Water Department
No active drinking-water issues detected in EPA SDWIS.
Reviewed: active/open records as of Q1 2026
City listed in EPA records · Serves 47,788 people
Data from EPA SDWIS
Reviewed: source records as of Q1 2026
EPA UCMR5 — No PFAS detection records shown for these water systems
Open data source: EPA UCMR5DoD PFAS — No investigation records shown for this report
Open data source: DoD PFASWater Body Impairment (ATTAINS) city records are temporarily unavailable.
NPDES permits regulate pollutant discharges into U.S. waterways. Facilities must report compliance quarterly.
Violation records
Last inspected: Dec 2025
Data from EPA ECHO
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.
San Luis Obispo 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.
Atascadero
Annual mean: 8.4 ppb · EPA standard: 100 ppb
Reported: 2024
Annual mean: 4.9 μg/m³ · EPA standard: 9 μg/m³
Reported: 2024
Annual mean: 14.1 μg/m³ · EPA standard: 150 μg/m³
Reported: 2024
Data from EPA AQS
Reviewed: source records as of Q4 2025
TRI releases are self-reported annual totals (calendar year 2024). Hover fugitive or stack for definitions.
Promega Corp
Reported: 2024
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
Reviewed: reporting year 2024
Formerly Used Defense Sites are properties previously owned by, leased to, or otherwise possessed by the United States and under the jurisdiction of the Secretary of Defense. The FUDS program addresses environmental restoration at these properties.
Open data source: USACE FUDSReported: Nov 2026
No MSHA mine or extraction site records shown for this report.
San Luis Obispo County, CA
Reported: Mar 2026
San Luis Obispo 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.
FEMA's National Flood Hazard Layer maps flood risk. Properties in a Special Flood Hazard Area are required to carry flood insurance if they have a federally backed mortgage.
Special Flood Hazard Area — 1% annual chance of shallow flooding (sheet flow, 1-3 feet).
Nuclear Regulatory Commission licensed facilities. The Emergency Planning Zone extends 10 miles for plume exposure and 50 miles for the ingestion pathway.
Reported: Mar 2026
This city report includes a facility within the 10-mile plume exposure Emergency Planning Zone.
1 reactor · Operated by Pacific Gas & Electric Co.
Reported: Mar 2026
This city report includes a facility within the 10-mile plume exposure Emergency Planning Zone.
1 reactor · Operated by Pacific Gas & Electric Co.
PHMSA tracks incidents involving natural gas and hazardous liquid pipelines. Incidents include leaks, ruptures, and explosions.
No pipeline incident records surfaced for this city report in the last 5 years.
Reviewed: last 5 years
Data from PHMSA
Health outcomes from County Health Rankings. Values shown alongside state and national averages.
San Luis Obispo County, CaliforniaPop. 282,013
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 | 5,707 | 6,373 | 7,972 |
| Poor or Fair Health | 14.1% | 15.8% | 14.2% |
| Poor Physical Health Days | 3.4 | 3.1 | 3.3 |
| Poor Mental Health Days | 5.1 | 4.7 | 4.8 |
| Adult Smoking | 11.7% | 8.8% | 15.0% |
| Adult Obesity | 30.5% | 27.8% | 34.0% |
| Air Pollution - Particulate Matter | 7.0 | 7.1 | 7.3 |
| Drinking Water Violations | 1 | 1 | N/A |
| Diabetes Prevalence | 8.9% | 10.8% | 9.6% |
| Life Expectancy | 81.2 | 79.9 | 77.6 |