San Bernardino, 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. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against other tracked counties rather than against these fixed caps.
Environmental data for San Bernardino in California · Population: 2,187,816
TRI sites such as Mp Mine Operations LLC; US Army Fort Irwin National Training Center; U.S. Marine Corps Twentynine Palms Air Ground Combat Center; SDWIS systems such as CUCAMONGA VALLEY WATER DISTRICT; ONTARIO MUNICIPAL UTILITIES COMPANY; SAN BERNARDINO VALLEY WD; NPL sites such as Barstow Marine Corps Logistics Base; George Air Force Base; Newmark Ground Water Contamination anchor San Bernardino, CA's EPA extract. Derived burden score 96/100 (High Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
EPCRA disclosures in San Bernardino total 7.0M lbs; health-flagged SDWIS rows include EAST VALLEY WATER DISTRICT; YUCAIPA VALLEY WATER DISTRICT; GOLDEN STATE WATER CO - BARSTOW, while Mp Mine Operations LLC leads TRI pounds. AQS median AQI 87 / peak 593 in 2024.
Largest TRI sites in the extract: Mp Mine Operations LLC; US Army Fort Irwin National Training Center; U.S. Marine Corps Twentynine Palms Air Ground Combat Center. Named SDWIS systems: CUCAMONGA VALLEY WATER DISTRICT; ONTARIO MUNICIPAL UTILITIES COMPANY; SAN BERNARDINO VALLEY WD. NPL sites on record: Barstow Marine Corps Logistics Base; George Air Force Base; Newmark Ground Water Contamination. Burden score 96/100 (High Risk) is the only weighted composite here; tables reproduce EPA disclosure history, not a current-safety verdict.
Release-over-release change
What changed for San Bernardino, CA: EPA TRI 2023 reporting year
Same facilities, both years
-30.7%
92 facilities that filed in 2022 and 2023
Whole inventory
+60.9%
1.5 million lb → 2.4 million lb, every facility that filed
These two measures point in opposite directions. Releases from the facilities present in both years fell, while the inventory-wide total rose. The difference is which facilities filed, not a different estimate of the same plants.
Between the two reporting years, 8 facilities filed for the first time and 7 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- San Bernardino, CA's total reported releases fell from 1.5 million lb in 2022 to 1.0 million lb in 2023, based on EPA TRI filings.
- San Bernardino, CA's water releases rose from 5 lb in 2022 to 22 lb in 2023, based on EPA TRI filings.
- San Bernardino, CA's air releases fell from 582.7 thousand lb in 2022 to 137.2 thousand lb in 2023, based on EPA TRI filings.
- San Bernardino, CA's land releases fell from 439.6 thousand lb in 2022 to 260.4 thousand 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 | 40 (11%) | 182 | 56 | 593 |
| 2023 | 50 (14%) | 197 | 67 | 214 |
| 2022 | 23 (6%) | 212 | 67 | 225 |
| 2021 | 17 (5%) | 202 | 73 | 486 |
| 2020 | 33 (9%) | 170 | 76 | 236 |
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 (138)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| CUCAMONGA VALLEY WATER DISTRICT | 211,069 | 0 |
| ONTARIO MUNICIPAL UTILITIES COMPANY | 185,010 | 0 |
| SAN BERNARDINO VALLEY WD | 109,608 | 0 |
| EAST VALLEY WATER DISTRICT | 108,629 | 12 |
| WEST VALLEY WATER DISTRICT | 104,498 | 0 |
| HESPERIA WD | 100,744 | 0 |
| CHINO, CITY OF | 86,435 | 0 |
| UPLAND, CITY OF | 78,376 | 0 |
| REDLANDS CITY MUD-WATER DIV | 78,025 | 0 |
| CHINO HILLS, CITY OF | 76,414 | 0 |
| MONTE VISTA WD | 56,017 | 0 |
| RIALTO, CITY OF | 54,453 | 0 |
| YUCAIPA VALLEY WATER DISTRICT | 52,010 | 12 |
| COLTON, CITY OF | 46,525 | 0 |
| ADELANTO, CITY OF | 39,930 | 0 |
| GOLDEN STATE WATER CO - BARSTOW | 32,547 | 4 |
| HI DESERT WD | 26,411 | 0 |
| BIG BEAR LAKE DWP - BIG BEAR SYSTEM | 26,132 | 0 |
| LOMA LINDA, CITY OF | 25,129 | 0 |
| TWENTYNINE PALMS WATER DISTRICT | 18,795 | 1 |
| USMC - 29 PALMS | 16,067 | 4 |
| US ARMY FORT IRWIN | 15,701 | 180 |
| LOMA LINDA UNIVERSITY | 15,368 | 0 |
| SBDNO COUNTY SERVICE AREA 64 | 14,911 | 0 |
| MUSCOY MWC NO. 1 | 13,000 | 1 |
| SBDNO COUNTY SERVICE AREA 70J | 12,843 | 0 |
| BIG BEAR CITY CSD | 12,738 | 0 |
| CRESTLINE VILLAGE CWD - DIVISION 10 | 11,650 | 0 |
| CALIFORNIA INSTITUTION FOR MEN | 10,667 | 8 |
| NEEDLES, CITY OF | 8,766 | 0 |
| WESTERN HEIGHTS WATER COMPANY | 7,705 | 0 |
| LAKE ARROWHEAD CSD | 7,038 | 0 |
| JOSHUA BASIN WATER DISTRICT | 6,640 | 6 |
| HELENDALE COMMUNITY SERVICE DISTRICT | 6,347 | 42 |
| GOLDEN STATE WATER CO - APPLE VLY SOUTH | 6,208 | 0 |
| GLEN HELEN WATER SYSTEM | 5,900 | 0 |
| RUNNING SPRINGS WATER DISTRICT | 5,268 | 0 |
| GOLDEN STATE WATER CO - WRIGHTWOOD | 4,177 | 0 |
| BIGHORN - DESERT VIEW WATER AGENCY | 3,916 | 0 |
| GILBERT STREET COMPLEX | 3,833 | 0 |
| SAN ANTONIO WATER COMPANY | 3,441 | 3 |
| Arizona Village | 3,211 | 11 |
| MARYGOLD MWC | 3,055 | 1 |
| HIGH DESERT DETENTION CENTER | 3,035 | 0 |
| Avi Casino | 3,001 | 10 |
| GREEN VALLEY MWC | 2,993 | 5 |
| ARROWHEAD VILLAS MUTUAL SERVICE COMPANY | 2,654 | 0 |
| ALPINE WATER USERS ASSOCIATION | 2,534 | 0 |
| VALLEY OF ENCHANTMENT MWC | 2,471 | 1 |
| CEDARPINES PARK MWC | 2,458 | 10 |
| TERRACE WATER COMPANY | 2,400 | 6 |
| CLAWA | 2,320 | 0 |
| Chemehuevi Water | 2,200 | 0 |
| THUNDERBIRD CWD | 2,098 | 13 |
| GOLDEN STATE WATER CO - APPLE VLY NORTH | 2,086 | 0 |
| ARROWBEAR PARK CWD | 1,856 | 1 |
| GOLDEN STATE WATER CO - MORONGO DEL SUR | 1,717 | 6 |
| DEVORE WC | 1,574 | 6 |
| MARIANA RANCHOS CWD | 1,502 | 6 |
| California Village | 1,290 | 0 |
| DWP - FAWNSKIN | 1,271 | 3 |
| SBDNO COUNTY SERVICE AREA 70 CEDAR GLEN | 1,240 | 16 |
| USMC NEBO (BARSTOW) | 1,126 | 0 |
| BDVWA - GOAT MOUNTAIN ID | 1,118 | 0 |
| BARTON FLATS WATER SYSTEM | 1,070 | 5 |
| FALLSVALE SERVICE COMPANY | 1,046 | 1 |
| INDIAN CREEK CSD | 1,030 | 0 |
| BAKER COMMUNITY SERVICES DISTRICT | 1,000 | 1 |
| APPLE VALLEY HEIGHTS CWD | 983 | 10 |
| JUNIPER RIVIERA CWD | 858 | 25 |
| DEER LODGE WATER SYSTEM | 845 | 0 |
| LACSD - RIMFOREST | 817 | 0 |
| APPLE VALLEY FOOTHILL CWD | 811 | 17 |
| DAGGETT COMM SVCS DIST | 795 | 44 |
| JUBILEE MWC | 782 | 8 |
| CENTER WATER CO | 662 | 0 |
| Mesquite Creek | 650 | 0 |
| CSA 70 W-3 HACIENDA | 611 | 88 |
| GOLDEN STATE WATER CO - LUCERNE | 586 | 3 |
| PALMS RIVER RESORT | 531 | 0 |
| CSA 42 ORO GRANDE | 529 | 0 |
| KNOLL ENTERPRISES | 500 | 125 |
| VALLEY VIEW PARK MWC | 499 | 1 |
| SKY FOREST MWC | 492 | 0 |
| RANCHERITOS MWC | 487 | 0 |
| LYTLE SPRINGS WC | 475 | 0 |
| CSA 70 W-4 PIONEERTOWN | 470 | 284 |
| LAGUNA MOBILE HOME AND RV PARK | 450 | 5 |
| GLEN MARTIN MWC | 450 | 1 |
| STRAWBERRY LODGE MWC | 381 | 0 |
| GOLDEN STATE WATER MORONGO DELNORTE | 373 | 0 |
| CALIFORNIAN MOBILE HOME PARK | 372 | 1 |
| SMILEY PARK COUNTRY CLUB | 370 | 3 |
| Havasu Water Company | 361 | 49 |
| FISHERMAN'S RETREAT | 352 | 7 |
| OLIVE DELL RANCH | 350 | 0 |
| DESERT SPRINGS MWC | 325 | 0 |
| MILL CREEK MSC | 315 | 0 |
| APPLE VALLEY VIEW MWC | 303 | 24 |
| BIG PINE TRACT | 300 | 0 |
| CSA 70-F MORONGO | 300 | 87 |
| RANCHERITOS #2 | 291 | 0 |
| MOSS MOBILE MANOR | 290 | 0 |
| River Reflections Estates | 267 | 0 |
| NAVAJO MWC | 264 | 0 |
| BAR "H" MWC | 260 | 23 |
| DEPARTMENT OF WATER AND POWER | 239 | 0 |
| DOGWOOD BLUE JAY CYN IMP | 232 | 0 |
| LUCERNE VALLEY MWC | 228 | 0 |
| LUCERNE VISTA MWC | 224 | 0 |
| IRONWOOD CAMP | 210 | 136 |
| GORDON ACRES WATER CO | 200 | 23 |
| CRYSTAL LAKE PROPERTY OWNERS | 186 | 0 |
| RIVER RANCH MHP | 176 | 0 |
| RECHE CANYON MUTUAL WATER CO. | 150 | 0 |
| DESERT DAWN MWC | 150 | 0 |
| BEAR VALLEY MHP | 150 | 0 |
| GOLDEN STATE WATER DESERT VIEW | 120 | 0 |
| HI DESERT MWC | 112 | 9 |
| UPPER LITTLE BEAR MOUNTAIN CLUB | 101 | 0 |
| CALI LAKE RV RESORT | 99 | 0 |
| WEST END MWC | 90 | 0 |
| CHAMISAL MWC | 84 | 1 |
| CDF - OAK GLEN CONSERVATION CAMP | 83 | 2 |
| PINEVIEW MOBILE HOME PARK | 80 | 1 |
| ROCKY COMFORT MUTUAL WATER CO | 71 | 0 |
| FOOTHILL ESTATES MHP | 66 | 0 |
| RANCHO PINO VERDE | 66 | 1 |
| BROOKSIDE MHP | 65 | 1 |
| CDF - PILOT ROCK CONSERVATION CAMP | 65 | 0 |
| CAMP WATERMAN MWC | 55 | 0 |
| Avi Kwa Ame Farms North | 40 | 2 |
| NORTH SHORE MWC | 7 | 26 |
| CHINO BASIN DESALTER AUTH. - DESALTER 2 | 0 | 0 |
| WATER FACILITIES AUTHORITY-JPA | 0 | 0 |
| CHINO BASIN DESALTER AUTH. - DESALTER 1 | 0 | 0 |
| WEST END CONSOLIDATED WATER COMPANY | 0 | 0 |
| MOJAVE WATER AGENCY | 0 | 0 |
TRI Facilities (50)
Superfund Sites (5)
| Site Name | Status | HRS Score |
|---|---|---|
| Barstow Marine Corps Logistics Base | NPL Site | 37.93 |
| George Air Force Base | NPL Site | 33.62 |
| Newmark Ground Water Contamination | NPL Site | 35.57 |
| Norton Air Force Base | NPL Site | 39.65 |
| Rockets, Fireworks, and Flares (RFF) | NPL Site | 50.00 |
Cities in San Bernardino (62)
Frequently Asked Questions
What is the environmental risk level in San Bernardino, California? ▼
Are there Superfund sites in San Bernardino? ▼
How many toxic release facilities are in San Bernardino? ▼
What is the air quality in San Bernardino? ▼
Is the drinking water safe in San Bernardino? ▼
What environmental agencies cover San Bernardino? ▼
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.