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Review government records associated with Arroyo Grande, California.
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Check your water bill for your utility name and confirm the reporting year. See EPA’s guide to finding your annual water quality report.
Public water-system records for Arroyo Grande, CA from EPA SDWIS.
City of Arroyo Grande Utilities Division
PFAS above an official threshold detected in available EPA records.
Reviewed: active/open records as of Q1 2026
Purchased or imported water record · Serves 17,963 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 Dec 2023 to Sep 2024.
Drinking Water PFAS Monitoring
EPA UCMR5 samples public water systems. These results are separate from nearby PFAS cleanup or investigation-site records.
6 PFAS sample results above EPA limits
Sample period: Dec 2023 to Sep 2024
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 | 0.0068 | 0.0040 | 2024-06-19 | Yes |
| PFOA | 0.0058 | 0.0040 | 2024-06-19 | Yes |
| PFOS | 0.0056 | 0.0040 | 2024-09-10 | Yes |
| PFOA | 0.0046 | 0.0040 | 2024-09-10 | Yes |
| PFOS | 0.0043 | 0.0040 | 2023-12-19 | Yes |
| PFOA | 0.0041 | 0.0040 | 2023-12-19 | Yes |
PFAS detections below EPA limits.
Nearby PFAS Investigation Sites
DoD records are nearby site investigations, not Arroyo Grande drinking-water detections. Record names come from the source database and can be broad.
No DoD PFAS investigation records shown for this report.
EPA ATTAINS records identify assessed water bodies that do not meet water-quality standards for designated uses.
Lower Arroyo Grande Creek
Reported: Nov 2026
Health-relevant causes: Pesticides
Affected uses: Drinkingwater, Ecological, Other
Data from EPA ATTAINS
Reviewed: source records as of Q4 2025
To investigate water contamination, check the sampling locations, dates and results below. For tap water records, see Drinking water quality above.
Reviewed: source records as of 2026
Review historical EPA air pollution records, including monitoring and facility emissions where available. For current conditions, check local air quality on AirNow.
San Luis Obispo County
Assessment year: 2020
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 modeled source groups
Data from EPA AirToxScreen
No EPA nonattainment designation records shown for this report.
EPA annual monitor summaries describe past measurements. For current air quality, see AirNow.
Cdf — Arroyo Grande, California
Annual mean: 22.9 Micrograms/cubic meter (25 C)
Observation year: 2025
Annual mean: 6.5 Micrograms/cubic meter (LC)
Observation year: 2025
Mesa2 — Nipomo, California
Annual mean: 20.4 Micrograms/cubic meter (25 C)
Observation year: 2025
Data from EPA AQS
Reviewed: source records as of Q4 2025
Reviewed: source query run Nov 2026
Reviewed: source query run Nov 2026
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.
San Luis Obispo County, CA
EPA Radon Zone Map (June 2024 release)
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.
FEMA flood zones describe mapped flood hazards. Look up a specific address with FEMA.
Special Flood Hazard Area — 1% annual chance of flooding (100-year floodplain) with base flood elevation.
Results use an earlier stored RMP inventory. Current EPA ECHO location coverage is unverified.
EPA ECHO lists facilities linked to the Risk Management Program. Results include facilities with locations that can be matched. Records may be historical. Current operations, chemical inventories, and recent accident history are unverified.
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.
Reviewed: 2000-present
Health outcomes from County Health Rankings. Values shown alongside state and national averages.
San Luis Obispo County, CaliforniaPop. 282,013
County Health Rankings edition: 2024
Premature Death
Poor or Fair Health
Poor Physical Health Days
Poor Mental Health Days
Adult Smoking
Adult Obesity
Air Pollution - Particulate Matter
Drinking water violation indicator
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 violation indicator | Yes | N/A | N/A |
| Diabetes Prevalence | 8.9% | 10.8% | 9.6% |
| Life Expectancy | 81.2 | 79.9 | 77.6 |
EPA testing found PFAS in water samples from the City of Arroyo Grande Utilities Division. Results dated Dec 19, 2023 to Sep 10, 2024 include PFBS at 0.0073 to 0.011 micrograms per liter and PFOS at 0.0043 to 0.0068 micrograms per liter.
Check with the utility that serves your address for its testing results.
EPA drinking water records on this page list 1 violation for the City of Arroyo Grande Utilities Division.
Check your water bill to identify the utility serving your address. Ask that utility about current drinking water advisories.
Nearby EPA monitoring stations provide annual air quality measurements for Arroyo Grande.
The monitoring station at Cdf, Arroyo Grande, California recorded an annual average of 22.9 Micrograms/cubic meter (25 C) for particles (PM10) in 2025.
The monitoring station at Cdf, Arroyo Grande, California recorded an annual average of 6.5 Micrograms/cubic meter (LC) for fine particles (PM2.5) in 2025.
The monitoring station at Mesa2, Nipomo, California recorded an annual average of 20.4 Micrograms/cubic meter (25 C) for particles (PM10) in 2025.
The radon data for Arroyo Grande covers San Luis Obispo County. EPA places this area in Zone 2, with a predicted average indoor radon screening level of 2 to 4 picocuries per liter.
No Superfund or brownfield sites were returned for this city report.
The county data for Arroyo Grande reports a life expectancy of 81.2 years in San Luis Obispo County, California.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
The county data for Arroyo Grande reports 5,707 years of life lost to deaths before age 75 per 100,000 residents in San Luis Obispo County, California. This measure adds up the years lost to early deaths and adjusts for differences in population age.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
The county data for Arroyo Grande lists fine-particle pollution (PM2.5) at 7.0 micrograms per cubic meter in San Luis Obispo County, California.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.