TRI Facilities
1,426
Very high
CA · EPA TRI · SDWIS · Superfund
California environmental disclosure record
According to EPA's 2023 Toxics Release Inventory, Safe Drinking Water Information System, and Superfund National Priorities List extracts, this is California's full public registry profile, toxic releases, drinking-water systems, and Superfund sites in one place.
- TRI facilities
- 1,426
- Reported releases
- 191.8M lbs
- #25 of 56
- Water systems
- 3,068
- Superfund NPL sites
- 116
California vs. every U.S. state
Cumulative TRI-reported release pounds, with this state marked in the national distribution
192M lbs Top 45% higher than 55% of 56 states with TRI reporters
Each bar is a $1M-wide band; taller bars hold more states with TRI reporters. The dashed line and filled bar mark this facility. Hover, focus, or tap a bar for its full count, share, and position.
Source U.S. Environmental Protection Agency, Toxics Release Inventory · 2023 reporting year
CA regulatory profile by statute
Violation/site counts mapped to the EPA statutes this portal tracks
- CWA · NPDES
- RCRA · Subtitle C 116
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.
How California compares across two EPA disclosure measures
The highlighted point is California. The vertical axis is the share of tracked water systems with at least one health-based SDWIS record; the horizontal axis is TRI-reported pounds per facility on a logarithmic scale so the full state distribution stays readable. The crosshairs use the portal’s published national benchmark medians.
This matrix compares disclosure rates, not toxicity, exposure, current compliance, or drinking-water safety. A lower position on either axis is not a safety rating; use the underlying facility and water-system records for context.
According to EPA TRI, SDWIS, and Superfund NPL extracts, California (CA) lists 1,426 TRI-reporting facilities disclosing 191.8M lbs of toxic releases. The same extracts list 116 Superfund sites and 3,068 EPA-regulated water systems, of which 1,274 carry health-based SDWIS violation rows. PlainEnviro's composite environmental health score for California is 49/100 (grade F), benchmarked against all U.S. states on chemical release intensity, drinking-water health violations, Superfund site burden, and water violation rate. This is a percentile-derived composite from federal disclosure counts, not a clinical health-risk assessment.
F 49
California Environmental Health Score
A percentile-benchmarked 0–100 composite from 4 EPA federal datasets, with weight redistribution for any unavailable dimension
Chemical Release Intensity C 77
134K (lbs per facility) Drinking Water Health Violations F 48
41.5% (% of systems) Superfund Site Burden F 16
8.1 (sites per 100 facilities) Water Violation Rate F 43
5.8 (violations per system) Benchmarks derived from EPA TRI, SDWIS, and Superfund NPL extracts across all 56 U.S. states and territories
Water Systems
3,068
Very high
Superfund Sites
116
Very high
Total Releases
191.8M lbs
Very high
Compliance Snapshot - CA
Sites with no recorded health violations 71.7%
Sites with at least one open violation 28.3%
California's profile joins three independently maintained EPA programs into one statewide record: the Toxics Release Inventory (TRI, EPCRA Section 313 industrial disclosures), the Safe Drinking Water Information System (SDWIS, Safe Drinking Water Act compliance), and the Superfund National Priorities List. Each program uses its own reporting cadence and facility-identification scheme; PlainEnviro joins them by matched facility and system location rather than a shared federal ID, so a site absent from one program is never assumed absent from another. The counts below reflect the portal's rebuild as of August 2026.
Activity clusters in counties such as Los Angeles, San Bernardino, Orange, which account for the highest combined facility, water-system, and Superfund presence. Monitoring and reporting violations are not included in the SDWIS counts shown here.
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
3,068
Superfund Sites
116
Health-Based Violation Records
17,705
Total Releases
191.8M lbs
cumulative, all reported years
Systems with Records
1,274
water systems
Release-over-release change
What changed for California: EPA TRI 2023 reporting year
Same facilities, both years
-19.4%
1,071 facilities that filed in 2022 and 2023
Whole inventory
-16.1%
43.9 million lb → 36.9 million lb, every facility that filed
Between the two reporting years, 56 facilities filed for the first time and 83 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- California's total reported releases fell from 43.7 million lb in 2022 to 35.3 million lb in 2023, based on EPA TRI filings.
- California's land releases fell from 20.7 million lb in 2022 to 13.8 million lb in 2023, based on EPA TRI filings.
- California's air releases fell from 7.2 million lb in 2022 to 6.0 million lb in 2023, based on EPA TRI filings.
- California's water releases fell from 3.6 million lb in 2022 to 3.1 million lb in 2023, based on EPA TRI filings.
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 |
| LINDSAY, CITY OF | 12,659 | 175 |
| HARRIS FARMS HEADQUARTERS | 140 | 174 |
| COLUSA CO. WWD #1 - GRIMES | 512 | 136 |
| IRONWOOD CAMP | 210 | 136 |
| ARVIN COMMUNITY SERVICES DIST | 19,669 | 133 |
| KNOLL ENTERPRISES | 500 | 125 |
| 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 |
| NPS-WOLVERTON | 2,940 | 119 |
| LAND PROJECTS MUTUAL WATER CO. | 2,800 | 118 |
| BAR-LEN MWC | 126 | 117 |
| PAUMA VALLEY WATER COMPANY | 185 | 113 |
| KEYES COMMUNITY SERVICES DIST. | 5,672 | 110 |
| FOREST SPRINGS | 385 | 109 |
| VALLEY FORD WATER ASSOCIATION | 88 | 109 |
| HARRIS FEEDING COMPANY | 203 | 108 |
| LAS CUMBRES MUTUAL WATER CO | 402 | 107 |
| SIERRA LINDA MUTUAL WATER CO | 200 | 106 |
| RIVERDALE PUBLIC UTILITY DISTRICT | 2,756 | 104 |
| MADERA CO MD1-HIDDEN LAKE ESTATES | 162 | 102 |
| QUIET OAKS MOBILE HOME PARK | 120 | 102 |
| MAHER MUTUAL WATER COMPANY | 140 | 98 |
| RAINBIRD VALLEY MWC | 238 | 96 |
| ALPAUGH COMMUNITY SERVICES DISTRICT | 871 | 96 |
| BRIDGEPORT PUD | 524 | 93 |
| R.S. MUTUAL WATER COMPANY | 67 | 91 |
| LSID - TONYVILLE | 500 | 91 |
| MCKEE BRIDGE MOBILE HOME PARK | 40 | 91 |
| MD 42 STILL MEADOW | 100 | 88 |
| CSA 70 W-3 HACIENDA | 611 | 88 |
| SURFWOOD MUTUAL WATER CORPORATION | 160 | 87 |
| CSA 70-F MORONGO | 300 | 87 |
| INDIAN OAKS TRAILER PARK | 70 | 86 |
| ENCINAL RD WS #01 | 91 | 84 |
| SIERRA VISTA ASSOCIATION | 43 | 84 |
| UC DESERT RESEARCH AND EXTENSION CENTER | 30 | 83 |
| SONOMA COUNTY MUTUAL WATER COMPANY | 40 | 83 |
| HARRIS FARMS SOUTH 101-144 | 182 | 82 |
| BORON CSD | 2,086 | 80 |
| KERN MOBILE ESTATES LLC | 73 | 79 |
| MADERA CO SA16 SUMNER HILL | 135 | 79 |
| MORO RD WS #09 | 210 | 79 |
| MD 07 MARINA VIEW HEIGHTS | 200 | 76 |
| RIM ROCK WATER COMPANY | 55 | 76 |
| HUGHSON, CITY OF | 7,481 | 76 |
| GREENFIELD COUNTY WD | 11,590 | 74 |
| TWIN LAKES RESORT | 400 | 73 |
| HARRIS FARMS/HORSE BARN | 98 | 72 |
| METTLER VALLEY MUTUAL | 160 | 72 |
| GOLDEN STATE WATER CO. - ROBBINS | 205 | 72 |
| ARMONA COMMUNITY SERVICES DIST | 4,143 | 71 |
| SEELEY CWD | 1,729 | 69 |
| TWO TWENTY FOUR MOBILE HOME PK | 35 | 67 |
| ROUND MOUNTAIN WATER COMPANY | 50 | 66 |
| NACIMIENTO WATER COMPANY | 2,181 | 66 |
| SIERRA MUTUAL WATER COMPANY | 43 | 66 |
| HOWELL MOUNTAIN MUTUAL WATER COMPANY | 1,240 | 65 |
| LANCASTER PARK MOBILE HOME PARK | 60 | 63 |
| LEMOORE NAVAL AIR STATION | 15,000 | 62 |
| RAND COMMUNITIES WATER DISTRICT | 303 | 61 |
| DOUBLETREE RANCH WATER SYSTEM | 66 | 60 |
| PANOCHE WATER DISTRICT | 220 | 60 |
| MD 24 TEAFORD MEADOW LAKES | 150 | 60 |
| EL CAMINO WC INC | 133 | 60 |
| LEBEC COUNTY WATER DISTRICT | 1,379 | 59 |
| SAN MIGUEL WS #01 | 100 | 59 |
| HUNGRY GULCH MWC | 74 | 57 |
| HERITAGE RANCH CSD | 2,956 | 57 |
| TWIN VALLEY INC | 317 | 57 |
| LAGUNA SECA WC | 162 | 56 |
| PSMCSD - SPRINGFIELD WS | 200 | 56 |
| VISTA DEL TORO WS | 92 | 55 |
| EAST OROSI COMMUNITY SERVICES DISTRICT | 423 | 55 |
| GUATAY MUTUAL BENEFIT CORPORATION | 100 | 54 |
| PINE VALLEY TRAILER PARK | 200 | 54 |
| OCOTILLO OASIS, LLC | 96 | 53 |
| MONTEREY PARK TRACT CSD | 186 | 53 |
| LEMON COVE WATER COMPANY | 109 | 53 |
| FCSA 34 - MILLERTON NEW TOWN | 1,117 | 52 |
| SAN JOAQUIN ESTATES MUTUAL WATER COMPANY | 165 | 52 |
| THE VILLAGE MOBILE HOME PARK | 71 | 52 |
| WILLIAM FISHER MEMORIAL WATER COMPANY | 56 | 51 |
| SAN LUIS HILLS | 779 | 51 |
| SUNNY ROAD WATER SYSTEM | 34 | 51 |
| PASKENTA COMM. SERVICES DIST. | 237 | 51 |
| GLEANINGS FOR THE HUNGRY | 31 | 51 |
| FCSA 32 - CANTUA CREEK | 462 | 50 |
| FIRST MUTUAL WATER SYSTEM | 35 | 50 |
| LOS MOLINOS COMM. SERVICES DIST. | 1,450 | 50 |
| Havasu Water Company | 361 | 49 |
Cities with Water Issues
Sacramento
74 water systems
Stockton
71 water systems
San Jose
69 water systems
Salinas
55 water systems
Bakersfield
49 water systems
Fresno
42 water systems
Santa Rosa
41 water systems
Madera
31 water systems
Chico
28 water systems
Bishop
24 water systems
Los Angeles
22 water systems
Hollister
21 water systems
San Luis Obispo
20 water systems
Red Bluff
20 water systems
Apple Valley
19 water systems
Lancaster
19 water systems
Redding
18 water systems
Oakdale
17 water systems
Santa Barbara
17 water systems
Royal Oaks
17 water systems
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 |
| San Luis Obispo | 15 |
| Santa Cruz | 2 |
| Santa Barbara | 12 |
Showing top 20 counties by environmental activity. California has 60 counties total.
Cities with Environmental Records
San Diego
50 facilities · 15 water systems
Los Angeles
42 facilities · 22 water systems
Santa Ana
29 facilities · 2 water systems
Torrance
28 facilities · 2 water systems
San Jose
27 facilities · 69 water systems
Santa Fe Springs
26 facilities · 2 water systems
Fresno
25 facilities · 42 water systems
Fontana
25 facilities · 1 water systems
Bakersfield
23 facilities · 49 water systems
Ontario
23 facilities · 3 water systems
City Of Industry
23 facilities · 0 water systems
Long Beach
22 facilities · 2 water systems
Stockton
21 facilities · 71 water systems
Anaheim
19 facilities · 11 water systems
Sacramento
18 facilities · 74 water systems
Fremont
18 facilities · 4 water systems
Gardena
18 facilities · 0 water systems
Riverside
17 facilities · 7 water systems
Corona
17 facilities · 5 water systems
Tracy
16 facilities · 9 water systems
Frequently Asked Questions
How many TRI 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).
What does EPA SDWIS list for drinking water in California? ▼
California has 3,068 EPA-regulated water systems in the Safe Drinking Water Information System (SDWIS) extract used here. 1,274 water systems have a health-based violation row (MCL exceedance) in this historical extract. A past registry row is not a current drinkability verdict. For current utility conditions, contact the local water utility or the California drinking water program. 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 3,068 water systems, and Superfund National Priorities List (NPL) data for 116 contaminated sites.
How does California compare to other states on EPA disclosure counts? ▼
California has 1,426 TRI facilities with 191.8M lbs in total releases, 116 Superfund sites, and 17,705 water system violations on record. These are federal disclosure counts; they are not toxicity-weighted or population-adjusted risk scores. Source: EPA TRI, SDWIS, and Superfund NPL databases.
What is California's environmental health score? ▼
PlainEnviro's composite environmental health score for California is 49/100 (grade F). This score combines four percentile-benchmarked dimensions from EPA federal extracts: chemical release intensity per TRI facility, drinking-water health violation rate from SDWIS, Superfund site burden relative to industrial activity, and overall water violation rate. Scores are benchmarked against all 56 U.S. states and territories. When a dimension lacks data, its weight redistributes to the remaining dimensions so the score never deflates from missing inputs. This is a registry-count composite, not a clinical exposure or health-outcome assessment.
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.
Use and verify this record
California's profile brings together EPA release, drinking-water, and Superfund records. It reports the underlying programs without making a health or environmental-risk determination.
State environmental figures are computed directly from EPA data. The methodology records the joins, definitions, and refresh cadence for each program.
PlainEnviro renders public EPA records directly from its data pipeline; no figure on this page is typed in by an editor. See the editorial standards and corrections policy for how source changes and reported errors are handled.