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Review government records associated with Ripon, 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 Ripon, CA from EPA SDWIS.
Ripon, City of
Active monitoring or reporting issue detected in EPA SDWIS.
Reviewed: active/open records as of Q1 2026
City listed in EPA records · Serves 15,741 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 Jul 2024 to Jan 2025.
Drinking Water PFAS Monitoring
EPA UCMR5 samples public water systems. These results are separate from nearby PFAS cleanup or investigation-site records.
4 PFAS sample results above EPA limits
Sample period: Jul 2024 to Jan 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 | 0.0120 | 0.0040 | 2025-01-14 | Yes |
| PFOS | 0.0120 | 0.0040 | 2024-07-31 | Yes |
| PFOA | 0.0052 | 0.0040 | 2024-07-31 | Yes |
| PFOA | 0.0050 | 0.0040 | 2025-01-14 | Yes |
PFAS detections below EPA limits.
Nearby PFAS Investigation Sites
DoD records are nearby site investigations, not Ripon 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.
Walthall Slough-San Joaquin River
Reported: Nov 2026
Health-relevant causes: Pesticides
Affected uses: Ecological, Fishconsumption
Data from EPA ATTAINS
NPDES permits regulate pollutant discharges into U.S. waterways. Facilities must report compliance quarterly.
Violation records
Last inspected: Dec 2025
Data from EPA ECHO
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 Joaquin County
Assessment year: 2020
According to EPA, a cancer risk of 40-in-1-million means that for every 1 million people continuously exposed to these air toxics over a 70-year lifetime, an estimated 40 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
EPA designates an area as nonattainment when air quality does not meet federal health-based standards (NAAQS) for a specific pollutant.
San Joaquin Valley: Ozone
NonattainmentExtreme8-Hour Ozone (2015 Standard)
Original designation: Aug 2018
Health effects (EPA): Respiratory inflammation, aggravation of asthma, reduced lung function (EPA)
San Joaquin Valley: PM2.5
NonattainmentSeriousPM-2.5 (2012 Standard)
Original designation: Apr 2015
Health effects (EPA): Cardiovascular disease, respiratory illness, premature death (EPA)
San Joaquin Valley 1997 PM2.5 Annual: PM2.5
NonattainmentSeriousPM-2.5 (1997 Standard)
Original designation: Apr 2005
Health effects (EPA): Cardiovascular disease, respiratory illness, premature death (EPA)
Data from EPA Green Book
EPA annual monitor summaries describe past measurements. For current air quality, see AirNow.
Manteca
Annual mean: 21.3 Micrograms/cubic meter (25 C)
Observation year: 2025
Annual mean: 7.4 Micrograms/cubic meter (LC)
Observation year: 2025
Modesto-14Th Street
Annual mean: 0.2 Parts per million
Observation year: 2025
Data from EPA AQS
Facilities regulated under the Clean Air Act. CAA HPV flags indicate serious noncompliance such as exceeding emission limits.
No facility records with active violation or noncompliance flags surfaced in EPA ECHO.
Reviewed: active/open records as of Q4 2025
Data from EPA ECHO
Reviewed: source query run Nov 2026
Reviewed: source query run Nov 2026
State environmental agencies maintain cleanup site databases that include state Superfund, voluntary cleanup, and brownfield remediation programs. These programs track additional sites beyond those on the federal NPL.
2 sites with active cleanup or investigation
816 West Main Street, Ripon
0.2 miles away · SAN JOAQUIN County
Reported: Nov 2026
230 INDUSTRIAL AVENUE, RIPON
0.6 miles away · SAN JOAQUIN County
Reported: Nov 2026
Data from EPA ECHO
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
Sites regulated by the Mine Safety and Health Administration, including mines, sand and gravel operations, and portable crushers. Status and type are from the MSHA Mine Data Retrieval System. Records with active/intermittent status dates older than 5 years are shown as older records rather than current active sites.
No records shown in this group.
Reviewed: status dates within last 5 years
Data from MSHA
San Joaquin County, CA
EPA Radon Zone Map (June 2024 release)
San Joaquin County is EPA Radon Zone 3 (low potential). EPA defines Zone 3 counties as having predicted average indoor screening levels below 2 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.
No FEMA flood-zone records shown for this report.
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.
Reviewed: 2000-present
Health outcomes from County Health Rankings. Values shown alongside state and national averages.
San Joaquin County, CaliforniaPop. 793,229
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 | 8,627 | 6,373 | 7,972 |
| Poor or Fair Health | 19.4% | 15.8% | 14.2% |
| Poor Physical Health Days | 3.7 | 3.1 | 3.3 |
| Poor Mental Health Days | 4.7 | 4.7 | 4.8 |
| Adult Smoking | 13.1% | 8.8% | 15.0% |
| Adult Obesity | 33.3% | 27.8% | 34.0% |
| Air Pollution - Particulate Matter | 9.8 | 7.1 | 7.3 |
| Drinking water violation indicator | Yes | N/A | N/A |
| Diabetes Prevalence | 11.8% | 10.8% | 9.6% |
| Life Expectancy | 76.6 | 79.9 | 77.6 |
EPA testing found PFAS in water samples from the City of Ripon. Results dated Jul 31, 2024 to Jan 14, 2025 include PFOS at 0.012 micrograms per liter and PFOA at 0.005 to 0.0052 micrograms per liter.
Check with the utility that serves your address for its testing results.
EPA drinking water records on this page list 3 violations for the City of Ripon.
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 Ripon.
The monitoring station at Manteca recorded an annual average of 21.3 Micrograms/cubic meter (25 C) for particles (PM10) in 2025.
The monitoring station at Manteca recorded an annual average of 7.4 Micrograms/cubic meter (LC) for fine particles (PM2.5) in 2025.
The monitoring station at Modesto-14th Street recorded an annual average of 0.2 Parts per million for carbon monoxide in 2025.
The radon data for Ripon covers San Joaquin County. EPA places this area in Zone 3, with a predicted average indoor radon screening level below 2 picocuries per liter.
No Superfund or brownfield sites were returned for this city report.
The county data for Ripon reports a life expectancy of 76.6 years in San Joaquin 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 Ripon reports 8,627 years of life lost to deaths before age 75 per 100,000 residents in San Joaquin 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 Ripon lists fine-particle pollution (PM2.5) at 9.8 micrograms per cubic meter in San Joaquin County, California.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.