Butte, 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 Butte in California · Population: 209,470
TRI sites such as Federal Cartridge Company-Oroville Operations; A&a Concrete Supply Inc Chico Plant; SDWIS systems such as SOUTH FEATHER W&P - MINERS RANCH; THERMALITO WATER & SEWER DIST; PARADISE IRRIGATION DISTRICT; NPL sites such as Koppers Co., Inc. (Oroville Plant); Louisiana-Pacific Corp.; Western Pacific Railroad Co. anchor Butte, CA's EPA extract. Derived burden score 31/100 (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 Butte include THERMALITO WATER & SEWER DIST; CITY OF GRIDLEY; CITY OF BIGGS, while Federal Cartridge Company-Oroville Operations leads reported TRI pounds among local Form R filers. AQS median AQI 46 / peak 213 in 2024.
Burden score 31/100 (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 Butte -- 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.
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 | 231 (63%) | 133 | 0 | 213 |
| 2023 | 191 (52%) | 174 | 0 | 100 |
| 2022 | 191 (52%) | 171 | 3 | 119 |
| 2021 | 160 (44%) | 174 | 18 | 257 |
| 2020 | 149 (41%) | 178 | 18 | 508 |
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 (27)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| SOUTH FEATHER W&P - MINERS RANCH | 22,664 | 0 |
| THERMALITO WATER & SEWER DIST | 12,136 | 2 |
| PARADISE IRRIGATION DISTRICT | 9,142 | 0 |
| CITY OF GRIDLEY | 7,269 | 1 |
| CITY OF BIGGS | 2,060 | 1 |
| DURHAM IRRIGATION DISTRICT | 1,581 | 0 |
| GRIDLEY FARM LABOR HOUSING | 460 | 0 |
| SIERRA MOON MUTUAL WATER COMPANY | 450 | 1 |
| PLEASANT GROVE MHP | 327 | 1 |
| LAKE MADRONE WATER DISTRICT | 297 | 0 |
| GRAN MUTUAL WATER CO | 290 | 0 |
| ALMOND GROVE MOBILE PARK | 253 | 1 |
| FOOTHILLS MANUFACTURED HOME COMMUNUTY | 180 | 1 |
| KEEFER CREEK ESTATES | 160 | 0 |
| YOUTH WITH A MISSION-SPRINGS OF LIVING W | 150 | 0 |
| FOREST RANCH MUTUAL WATER SYSTEM | 119 | 2 |
| MERRY MOUNTAIN MUTUAL | 90 | 1 |
| WEST COTTONWOOD APARTMENTS | 90 | 1 |
| BLUE OAK TERRACE MUTUAL | 81 | 0 |
| SOUTH FEATHER W&P - BANGOR | 73 | 0 |
| HUMBOLDT HIGHLANDS MUTUAL | 58 | 0 |
| HUMBOLDT WOODLANDS MUTUAL | 55 | 1 |
| FOREST KNOLLS MUTUAL WATER CO | 46 | 2 |
| MOUNTAIN VILLAGE HOMEOWNER'S ASSOC | 45 | 1 |
| HARTLEY MUTUAL WATER SYSTEM | 41 | 1 |
| BERRY CREEK COMMUNITY SERVICE DIST | 28 | 1 |
| FALLING ROCK RV PARK | 25 | 0 |
TRI Facilities (2)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Federal Cartridge Company-Oroville Operations | 0 lbs |
| 2 | A&a Concrete Supply Inc Chico Plant | 0 lbs |
Superfund Sites (3)
| Site Name | Status | HRS Score |
|---|---|---|
| Koppers Co., Inc. (Oroville Plant) | NPL Site | 33.73 |
| Louisiana-Pacific Corp. | Deleted NPL Site | 33.73 |
| Western Pacific Railroad Co. | Deleted NPL Site | 39.79 |
Cities in Butte (11)
Frequently Asked Questions
What is the environmental risk level in Butte, California? ▼
Are there Superfund sites in Butte? ▼
How many toxic release facilities are in Butte? ▼
What is the air quality in Butte? ▼
Is the drinking water safe in Butte? ▼
What environmental agencies cover Butte? ▼
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.