Mendocino, CA
Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology.
Environmental data for Mendocino in California · Population: 90,709
TRI sites such as Mendocino Forest Products Co. LLC; Nick Barbieri Trucking LLC DBA Redwood Coast Fuels; SDWIS systems such as UKIAH, CITY OF; FORT BRAGG, CITY OF; WILLITS, CITY OF; NPL sites such as Coast Wood Preserving anchor Mendocino, CA's EPA extract. Derived burden score 30/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Health-flagged SDWIS rows in Mendocino include FORT BRAGG, CITY OF; WILLITS, CITY OF; REDWOOD VALLEY COUNTY WATER DISTRICT, while Mendocino Forest Products Co. LLC leads reported TRI pounds among local Form R filers. AQS median AQI 43 / peak 83 in 2024.
Burden score 30/100 (Moderate Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Mendocino -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.
Release-over-release change
What changed for Mendocino, CA: EPA TRI 2023 reporting year
Same facilities, both years
+740.6%
1 facilities that filed in 2022 and 2023
Whole inventory
+740.6%
30 lb → 250 lb, every facility that filed
Between the two reporting years, 0 facilities filed for the first time and 1 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Mendocino, CA's total reported releases rose from 30 lb in 2022 to 250 lb in 2023, based on EPA TRI filings.
- Mendocino, CA's off-site transfers rose from 30 lb in 2022 to 250 lb in 2023, based on EPA TRI filings.
Air Quality History (2020–2024)
EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.
| Year | Good | Moderate | Unhealthy (SG) | Max AQI |
|---|---|---|---|---|
| 2024 | 244 (67%) | 122 | 0 | 83 |
| 2023 | 144 (39%) | 216 | 5 | 140 |
| 2022 | 129 (35%) | 234 | 2 | 103 |
| 2021 | 210 (58%) | 147 | 6 | 185 |
| 2020 | 240 (66%) | 103 | 10 | 716 |
Source: EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)
For real-time air quality readings and pollutant breakdowns in California, see the EPA's AirNow.gov.
Water Systems (42)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| UKIAH, CITY OF | 16,607 | 0 |
| FORT BRAGG, CITY OF | 6,919 | 1 |
| WILLITS, CITY OF | 6,175 | 11 |
| MILLVIEW COUNTY WATER DISTRICT | 5,500 | 0 |
| REDWOOD VALLEY COUNTY WATER DISTRICT | 5,200 | 1 |
| WILLOW COUNTY WATER DISTRICT | 3,797 | 0 |
| BROOKTRAILS TOWNSHIP CSD | 3,632 | 0 |
| NORTH GUALALA WATER COMPANY | 2,593 | 2 |
| LAYTONVILLE COUNTY WATER DISTRICT | 1,152 | 0 |
| HOPLAND PUBLIC UTILITY DISTRICT | 1,076 | 0 |
| Coyote Valley System | 850 | 0 |
| Point Arena Rancheria | 616 | 14 |
| DOLPHIN ISLE MARINA | 560 | 0 |
| CALPELLA COUNTY WATER DISTRICT | 548 | 0 |
| POINT ARENA WATER WORKS | 459 | 0 |
| Round Valley Piner | 409 | 5 |
| ELK COUNTY WATER DISTRICT | 380 | 1 |
| WESTPORT COUNTY WATER DISTRICT | 369 | 1 |
| PINE MOUNTAIN MUTUAL WATER CO. | 310 | 0 |
| Mitomkai Tribal Water System | 300 | 0 |
| WOODSIDE RV PARK | 280 | 4 |
| RIDGEWOOD WATER SYSTEM | 265 | 1 |
| IRISH BEACH WATER DISTRICT | 254 | 1 |
| Shanel Tribal Utility District | 250 | 0 |
| RIVER ESTATES MUTUAL WATER COMPANY | 250 | 0 |
| OCEAN'S EDGE ESTATES | 250 | 0 |
| SURFWOOD MUTUAL WATER CORPORATION | 160 | 87 |
| Redwood Valley Rancheria | 152 | 1 |
| Manchester Rancheria | 100 | 10 |
| MEADOW ESTATES MUTUAL | 100 | 0 |
| LAKE VIEW MUTUAL WATER CO. | 90 | 0 |
| Round Valley Agency | 84 | 4 |
| HILLS RANCH MUTUAL WATER COMPANY | 79 | 0 |
| SHORELANDS ROAD & WATER COMPANY | 78 | 0 |
| YOKAYO TRIBE OF INDIANS | 75 | 1 |
| Original Sherwood Valley Rancheria | 60 | 5 |
| ALBION MUTUAL WATER COMPANY | 56 | 2 |
| POINT OF VIEW MUTUAL WATER CO | 56 | 0 |
| SEAFAIR ROAD AND WATER COMPANY | 50 | 1 |
| HOLLY RANCH VILLAGE | 50 | 0 |
| BIG RIVER VISTA MUTUAL WATER COMPANY | 36 | 0 |
| COVELO MOBILE HOME PARK | 30 | 1 |
TRI Facilities (2)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Mendocino Forest Products Co. LLC | 578 lbs |
| 2 | Nick Barbieri Trucking LLC DBA Redwood Coast Fuels | 0 lbs |
Superfund Sites (1)
| Site Name | Status | HRS Score |
|---|---|---|
| Coast Wood Preserving | NPL Site | 44.73 |
Cities in Mendocino (15)
Frequently Asked Questions
What is the environmental risk level in Mendocino, California? ▼
Are there Superfund sites in Mendocino? ▼
How many toxic release facilities are in Mendocino? ▼
What is the air quality in Mendocino? ▼
Is the drinking water safe in Mendocino? ▼
What environmental agencies cover Mendocino? ▼
What does this county environmental profile show?
This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.
Read our methodology - how this data is sourced, computed, and verified.