Plumas, 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 Plumas in California · Population: 19,607
TRI sites such as Sierra Pacific Industries Quincy Div; Collins Pine Co Chester Sawmill; SDWIS systems such as AMERICAN VALLEY CSD; CHESTER PUBLIC U.D.; CITY OF PORTOLA anchor Plumas, CA's EPA extract. Derived burden score 32/100 (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 Plumas include AMERICAN VALLEY CSD; CHESTER PUBLIC U.D.; PLUMAS EUREKA CSD, while Sierra Pacific Industries Quincy Div leads reported TRI pounds among local Form R filers. AQS median AQI 48 / peak 253 in 2024.
Burden score 32/100 (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 Plumas -- 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 Plumas, CA: EPA TRI 2023 reporting year
Same facilities, both years
-42.2%
2 facilities that filed in 2022 and 2023
Whole inventory
-42.2%
30.0 thousand lb → 17.3 thousand lb, every facility that filed
- Plumas, CA's total reported releases fell from 30.0 thousand lb in 2022 to 17.3 thousand lb in 2023, based on EPA TRI filings.
- Plumas, CA's land releases fell from 26 lb in 2022 to 9 lb in 2023, based on EPA TRI filings.
- Plumas, CA's air releases fell from 30.0 thousand lb in 2022 to 17.3 thousand lb in 2023, based on EPA TRI filings.
- Plumas, CA's chemicals reported rose from 3 in 2022 to 4 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 | 188 (51%) | 162 | 7 | 253 |
| 2023 | 186 (51%) | 168 | 11 | 142 |
| 2022 | 148 (41%) | 182 | 25 | 175 |
| 2021 | 97 (27%) | 184 | 37 | 654 |
| 2020 | 135 (38%) | 175 | 16 | 755 |
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 (24)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| AMERICAN VALLEY CSD | 3,778 | 6 |
| CHESTER PUBLIC U.D. | 2,187 | 2 |
| CITY OF PORTOLA | 2,100 | 0 |
| PLUMAS EUREKA CSD | 1,534 | 35 |
| WEST ALMANOR M.W.C. | 1,394 | 0 |
| GRIZZLY LAKE CSD-DELLEKER | 1,314 | 24 |
| WHITEHAWK RANCH MWC | 765 | 0 |
| FEATHER RIVER RV & MHP | 741 | 1 |
| GRAEAGLE WATER COMPANY | 737 | 0 |
| IVCSD-GREENVILLE | 630 | 2 |
| GREENHORN CREEK CSD | 280 | 0 |
| IVCSD CRESCENT MILLS | 258 | 0 |
| GRIZZLY LAKE CSD-CROCKER/WELCH | 215 | 0 |
| BLAIRSDEN WATER USERS ASSN | 200 | 1 |
| WALKER RANCH CSD | 150 | 0 |
| GOLD MOUNTAIN CSD | 135 | 1 |
| CONESTOGA MHP | 120 | 0 |
| GRIZZLY RANCH CSD | 102 | 0 |
| CLIO PUBLIC UTILITY DISTRICT | 79 | 1 |
| VALIVU ESTATES MHP | 54 | 1 |
| MEADOW EDGE MHP | 53 | 1 |
| GREENHAVEN HOA | 38 | 0 |
| FRCCSD OLD MILL RANCH | 32 | 1 |
| FRCCSD HOT SPRINGS | 25 | 1 |
TRI Facilities (2)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Sierra Pacific Industries Quincy Div | 154.8K lbs |
| 2 | Collins Pine Co Chester Sawmill | 283 lbs |
Cities in Plumas (9)
Frequently Asked Questions
What is the environmental risk level in Plumas, California? ▼
Are there Superfund sites in Plumas? ▼
How many toxic release facilities are in Plumas? ▼
What is the air quality in Plumas? ▼
Is the drinking water safe in Plumas? ▼
What environmental agencies cover Plumas? ▼
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.