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Review government records associated with Ukiah, California.
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Preparing Ukiah environmental records...
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 Ukiah, CA from EPA SDWIS.
Ukiah, 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 16,607 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 Jan 2023 to Oct 2023.
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: Jan 2023 to Oct 2023
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 | 0.0074 | 0.0040 | 2023-01-17 | Yes |
| PFOA | 0.0069 | 0.0040 | 2023-01-17 | Yes |
| PFOS | 0.0046 | 0.0040 | 2023-07-19 | Yes |
| PFOS | 0.0045 | 0.0040 | 2023-10-18 | Yes |
| PFOS | 0.0043 | 0.0040 | 2023-10-18 | Yes |
| PFOS | 0.0041 | 0.0040 | 2023-07-19 | Yes |
PFAS detections below EPA limits.
Nearby PFAS Investigation Sites
DoD records are nearby site investigations, not Ukiah 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.
Orrs Creek-Russian River
Reported: Nov 2026
Health-relevant causes: Mercury, Metals (other Than Mercury)
Affected uses: Drinkingwater, Ecological, Fishconsumption, Other
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.
Mendocino 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.
Lakeport-S. Main Street
Annual mean: 0.034 Parts per million
Observation year: 2025
Annual mean: 11.9 Micrograms/cubic meter (25 C)
Observation year: 2025
Annual mean: 4.1 Micrograms/cubic meter (LC)
Observation year: 2025
Data from EPA AQS
Reviewed: source records as of Q4 2025
Reviewed: source records as of 2024
EPA records for current, proposed and formerly listed Superfund sites on the National Priorities List (NPL).
Open data source: Search EPA ECHOEPA FRS Registry ID 110064127573
Reported: Nov 2021
Brownfield sites are properties where redevelopment is complicated by the presence of hazardous substances.
Open data source: Search EPA ECHO2 sites with active cleanup or investigation status
Perkins Street, Ukiah
Reported: Feb 2026
124 138 And 140 Leslie St, Ukiah
Reported: Feb 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.
1 site with active cleanup or investigation
200-246 Barnes Street, Ukiah
0.6 miles away · MENDOCINO 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
Reviewed: reporting year 2024
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.
More MSHA records matched the search than this preview shows.
No records shown in this group.
Reviewed: status dates within last 5 years
Data from MSHA
Mendocino County, CA
EPA Radon Zone Map (June 2024 release)
Mendocino 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.
Minimal flood hazard — outside the 1% and 0.2% annual chance floodplains.
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.
Mendocino County, CaliforniaPop. 89,783
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 | 9,612 | 6,373 | 7,972 |
| Poor or Fair Health | 17.9% | 15.8% | 14.2% |
| Poor Physical Health Days | 4.0 | 3.1 | 3.3 |
| Poor Mental Health Days | 5.7 | 4.7 | 4.8 |
| Adult Smoking | 15.1% | 8.8% | 15.0% |
| Adult Obesity | 31.5% | 27.8% | 34.0% |
| Air Pollution - Particulate Matter | 6.0 | 7.1 | 7.3 |
| Drinking water violation indicator | No | N/A | N/A |
| Diabetes Prevalence | 10.0% | 10.8% | 9.6% |
| Life Expectancy | 77.2 | 79.9 | 77.6 |
EPA testing found PFAS in water samples from the City of Ukiah. Results dated Jan 17, 2023 to Oct 18, 2023 include 6:2 FTS at 0.0178 micrograms per liter and PFBA at 0.0092 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 Ukiah, including 1 marked active.
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 Ukiah.
The monitoring station at Lakeport-S. Main Street recorded an annual average of 0.034 Parts per million for ozone in 2025.
The monitoring station at Lakeport-S. Main Street recorded an annual average of 11.9 Micrograms/cubic meter (25 C) for particles (PM10) in 2025.
The monitoring station at Lakeport-S. Main Street recorded an annual average of 4.1 Micrograms/cubic meter (LC) for fine particles (PM2.5) in 2025.
The radon data for Ukiah covers Mendocino County. EPA places this area in Zone 3, with a predicted average indoor radon screening level below 2 picocuries per liter.
This city report shows 1 Superfund site: Coast Wood Preserving.
This city report shows 2 brownfield sites: Ukiah City of; Ukiah Leslie St.
The county data for Ukiah reports a life expectancy of 77.2 years in Mendocino 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 Ukiah reports 9,612 years of life lost to deaths before age 75 per 100,000 residents in Mendocino 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 Ukiah lists fine-particle pollution (PM2.5) at 6.0 micrograms per cubic meter in Mendocino County, California.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.