TRI Facilities
1,426
EPCRA Section 313 reporters
2023 EPA TRI data 1,426 facilities 3,077 water systems
California Environmental Profile
According to the U.S. Environmental Protection Agency's 2023 Toxics Release Inventory, Safe Drinking Water Information System, and Superfund National Priorities List, this is California's (CA) full public environmental-compliance record - toxic releases, drinking-water systems, and Superfund sites in one place.
CA regulatory profile by statute
Violation/site counts mapped to the EPA statutes this portal tracks
- CWA · NPDES
Clean Water Act, NPDES (water-system health violations)
1,274 records
- RCRA · Subtitle C 116
RCRA Subtitle C (Superfund-site proxy)
116 records
What this shows Counts are mapped to statute as a structural proxy and reflect reported activity, not toxicity-weighted or population-adjusted risk. Clean Air Act (Title V) permit data is not currently ingested by this portal, so air-permit compliance is not shown here.
Water Systems
3,077
SDWIS regulated
Superfund Sites
116
97 active NPL
Total Releases
191.8M lbs
TRI cumulative disclosure
Compliance Snapshot - CA
Sites with no recorded health violations 71.7%
Sites with at least one open violation 28.3%
California consolidates three federal EPA datasets into one statewide environmental profile: 1,426 Toxics Release Inventory (TRI) facilities reporting under EPCRA Section 313, 3,077 community water systems regulated under the Safe Drinking Water Act, and 116 sites on the Superfund National Priorities List.
TRI facilities in CA have cumulatively disclosed 191.8M lbs of toxic chemical releases, while SDWIS records show 17,550 total violations across the state's regulated water systems, of which 1,274 systems carry an active health-based violation (MCL exceedance or treatment-technique failure). Activity clusters in counties such as Los Angeles, San Bernardino, Orange, which account for the highest combined facility, water-system, and Superfund presence.
Every figure reflects the public regulatory record as filed with the U.S. Environmental Protection Agency and is not weighted for toxicity, geographic footprint, or population exposure. A state can rank high in any individual metric because of industrial history, naturally occurring contaminants in source water, or simply the number of reporting facilities, not because current residents face unsafe conditions. Drill into any county or water system below for the full disclosure record.
What does this state's environmental record show?
TRI Facilities
1,426
Water Systems
3,077
Superfund Sites
116
Total Violations
17,550
Total Releases
191.8M lbs
Health Violations
1,274
water systems
Largest Polluters
View all →| # | Facility | Total Releases |
|---|---|---|
| 1 | Clean Harbors Buttonwillow LLC | 50.4M lbs |
| 2 | Chemical Waste Management Inc | 19.2M lbs |
| 3 | Ecobat Resources California Inc. | 9.5M lbs |
| 4 | Chevron Products Co. Div of Chevron USA Inc. | 9.4M lbs |
| 5 | Martinez Refining Co LLC | 5.0M lbs |
| 6 | Tesoro Los Angeles Refinery-Carson Operations | 4.8M lbs |
| 7 | US Pipe & Foundry Co LLC | 3.9M lbs |
| 8 | Phillips 66 Rodeo Renewable Energy Complex | 3.8M lbs |
| 9 | Procter & Gamble Mfg. Co. | 3.4M lbs |
| 10 | US Marine Corps Mcb Camp Pendleton | 3.3M lbs |
| 11 | Wm Bolthouse Farms Inc | 3.2M lbs |
| 12 | Tesla Inc | 3.0M lbs |
| 13 | Chevron Products Co Richmond Refinery | 3.0M lbs |
| 14 | Valero Refining Co-Cali Fornia Benicia Refinery | 2.9M lbs |
| 15 | Saputo Cheese USA Inc. | 2.6M lbs |
| 16 | Lactalis Heritage Dairy Inc. | 2.0M lbs |
| 17 | Torrance Refining Co LLC | 1.9M lbs |
| 18 | Phillips 66 Los Angeles Refinery Wilmington Plant | 1.4M lbs |
| 19 | Mp Mine Operations LLC | 1.4M lbs |
| 20 | Saputo Cheese USA Inc | 1.3M lbs |
Water Quality
Systems with Health Violations
| Water System | Population | Violations |
|---|---|---|
| CAL AM - OAKHURST | 3,693 | 368 |
| CAL AM - RAYMOND | 343 | 364 |
| CSA 70 W-4 PIONEERTOWN | 470 | 284 |
| Grindstone Rancheria | 150 | 234 |
| NORTH EDWARDS WD | 1,105 | 203 |
| US ARMY FORT IRWIN | 15,701 | 180 |
| PAPPAS & CO (MENDOTA) | 36 | 176 |
| DEL ORO RIVER ISLAND SERV TERR #1 | 1,280 | 176 |
| HARRIS FARMS HEADQUARTERS | 140 | 174 |
| LINDSAY, CITY OF | 12,659 | 173 |
| COLUSA CO. WWD #1 - GRIMES | 512 | 135 |
| IRONWOOD CAMP | 210 | 134 |
| ARVIN COMMUNITY SERVICES DIST | 19,669 | 133 |
| LANARE COMMUNITY SERVICES DIST | 540 | 120 |
| CARUTHERS COMM SERV DIST | 2,613 | 120 |
| KETTLEMAN CITY CSD | 1,242 | 120 |
| LEMOORE, CITY OF | 27,185 | 119 |
| KNOLL ENTERPRISES | 500 | 119 |
| LAND PROJECTS MUTUAL WATER CO. | 2,800 | 117 |
| BAR-LEN MWC | 126 | 114 |
Cities with Water Issues
Los Angeles
Pop: -
West Hollywood
Pop: -
Compton
Pop: -
Downey
Pop: -
Hawthorne
Pop: -
Buena Park
Pop: -
Artesia
Pop: -
Victorville
Pop: -
Long Beach
Pop: -
Signal Hill
Pop: -
Bakersfield
Pop: -
Arcadia
Pop: -
Pasadena
Pop: -
Valencia
Pop: -
Santa Clarita
Pop: -
Azusa
Pop: -
Chino
Pop: -
Corona
Pop: -
Rancho Cucamonga
Pop: -
El Monte
Pop: -
Superfund Sites (116)
Counties (60 total)
| County | Facilities |
|---|---|
| Los Angeles | 399 |
| San Bernardino | 121 |
| Orange | 128 |
| San Diego | 92 |
| Santa Clara | 63 |
| Riverside | 66 |
| Sacramento | 30 |
| Kern | 41 |
| San Joaquin | 49 |
| Fresno | 40 |
| Monterey | 7 |
| Sonoma | 14 |
| Tulare | 28 |
| Contra Costa | 42 |
| Ventura | 29 |
| Stanislaus | 30 |
| Alameda | 59 |
| Santa Cruz | 2 |
| San Luis Obispo | 15 |
| Santa Barbara | 12 |
Showing top 20 counties by environmental activity. California has 60 counties total.
Largest Cities
Los Angeles
Pop: -
42 facilities · 26 water systems
Vernon
Pop: -
12 facilities · 1 water systems
Commerce
Pop: -
10 facilities · 0 water systems
West Hollywood
Pop: -
1 facilities · 1 water systems
City Of Commerce
Pop: -
1 facilities · 0 water systems
Rosewood
Pop: -
1 facilities · 0 water systems
Bell
Pop: -
1 facilities · 0 water systems
Cudahy
Pop: -
2 facilities · 2 water systems
Bell Gardens
Pop: -
1 facilities · 0 water systems
Compton
Pop: -
10 facilities · 2 water systems
Rancho Dominguez
Pop: -
1 facilities · 0 water systems
East Rancho Dominguez
Pop: -
1 facilities · 0 water systems
Downey
Pop: -
3 facilities · 9 water systems
El Segundo
Pop: -
7 facilities · 1 water systems
Gardena
Pop: -
18 facilities · 0 water systems
Hawthorne
Pop: -
4 facilities · 5 water systems
South Gate
Pop: -
15 facilities · 1 water systems
Huntington Park
Pop: -
5 facilities · 3 water systems
Lynwood
Pop: -
1 facilities · 1 water systems
Inglewood
Pop: -
2 facilities · 1 water systems
Frequently Asked Questions
How many polluting facilities are in California? ▼
California has 1,426 facilities that report to the EPA Toxic Release Inventory (TRI). These facilities have collectively reported 191.8M lbs in total toxic chemical releases. TRI data is self-reported annually by facilities that manufacture, process, or use listed toxic chemicals above threshold amounts.
Does California have Superfund sites? ▼
Yes, California has 116 sites on the EPA Superfund National Priorities List (NPL). Superfund sites are contaminated locations identified for long-term cleanup under the EPA Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).
Is the water safe in California? ▼
California has 3,077 EPA-regulated water systems. 1,274 water systems have reported health-based violations (MCL exceedances). A past violation does not necessarily mean water is currently unsafe. For current water quality, contact your local water utility. Source: EPA SDWIS.
What environmental data is available for California? ▼
PlainEnviro provides three categories of EPA environmental data for California: Toxic Release Inventory (TRI) data covering 1,426 industrial facilities, Safe Drinking Water Information System (SDWIS) data for 3,077 water systems, and Superfund National Priorities List (NPL) data for 116 contaminated sites.
How does California compare to other states environmentally? ▼
California has 1,426 TRI facilities with 191.8M lbs in total releases, 116 Superfund sites, and 17,550 water system violations on record. State-level environmental comparisons depend on many factors including industrial activity, population, and geographic size. Source: EPA TRI, SDWIS, and Superfund NPL databases.
Explore More Data for California
TRI Facilities in California →
Every toxic-release facility reporting in the state, ranked by volume
Drinking Water Systems in California →
Community water systems and their violation records
Air Quality in California →
County-level AQI from EPA monitoring stations
Compare states by burden →
EJ screening scores for every U.S. county
State environmental rankings →
How states compare on releases, water and Superfund
Browse all states →
Environmental profiles for every U.S. state
About This Data
This page aggregates environmental data from three EPA programs for California: the Toxic Release Inventory (TRI) for industrial chemical releases, the Safe Drinking Water Information System (SDWIS) for water quality, and the Superfund National Priorities List (NPL) for hazardous waste cleanup sites.
PlainEnviro presents this data without advocacy framing. Numbers reflect reported data and may not capture all environmental activity. For specific health or environmental concerns, contact your state environmental agency.
What to do with California's data
Use this state profile as a starting point, then drill into the specific dataset that matters to you.
- Check the 1,426 TRI facilities reporting in California for the largest reported releases near a specific county. View facilities
- 1,274 water systems in the state have a recorded health-based violation, check if yours is one of them. Check water systems
- See how California compares to other states on releases, water violations, and Superfund sites. State rankings
Reported data reflects what facilities and agencies disclose to the EPA; it is not a complete measure of environmental risk or a substitute for local guidance.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro Editorial
According to the U.S. Environmental Protection Agency, this state profile is drawn from PlainEnviro's database of more than 25,000 EPA-tracked facilities, the Safe Drinking Water Information System, and the Superfund National Priorities List, compiled since federal reporting began under the Emergency Planning and Community Right-to-Know Act in October 1986; see our methodology for full source citations and refresh cadence.
Every figure on PlainEnviro is rendered directly from EPA environmental compliance data, no number is typed in by an editor. State environmental figures are computed directly from EPA data. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.