San Diego, 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 Diego in California · Population: 3,282,782
TRI sites such as US Marine Corps Mcb Camp Pendleton; General Dynamics (nassco); Bae Systems San Diego Ship Repair; SDWIS systems such as SAN DIEGO, CITY OF; HELIX WATER DISTRICT; OTAY WATER DISTRICT; NPL sites such as Camp Pendleton Marine Corps Base anchor San Diego, CA's EPA extract. Derived burden score 76/100 (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 Diego total 6.2M lbs; health-flagged SDWIS rows include CAL-AM WATER CORONADO; CAMP PENDLETON (SOUTH); Pala North, while US Marine Corps Mcb Camp Pendleton leads TRI pounds. AQS median AQI 71 / peak 161 in 2024.
Largest TRI sites in the extract: US Marine Corps Mcb Camp Pendleton; General Dynamics (nassco); Bae Systems San Diego Ship Repair. Named SDWIS systems: SAN DIEGO, CITY OF; HELIX WATER DISTRICT; OTAY WATER DISTRICT. NPL sites on record: Camp Pendleton Marine Corps Base. Burden score 76/100 (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 Diego, CA: EPA TRI 2023 reporting year
Same facilities, both years
-18.3%
72 facilities that filed in 2022 and 2023
Whole inventory
-18.4%
1.7 million lb → 1.4 million lb, every facility that filed
Between the two reporting years, 4 facilities filed for the first time and 3 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- San Diego, CA's total reported releases fell from 1.7 million lb in 2022 to 1.4 million lb in 2023, based on EPA TRI filings.
- San Diego, CA's off-site transfers rose from 220.3 thousand lb in 2022 to 470.8 thousand lb in 2023, based on EPA TRI filings.
- San Diego, CA's water releases rose from 52.0 thousand lb in 2022 to 110.0 thousand lb in 2023, based on EPA TRI filings.
- San Diego, CA's land releases fell from 1.1 million lb in 2022 to 480.1 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 | 47 (13%) | 267 | 48 | 161 |
| 2023 | 61 (17%) | 260 | 44 | 150 |
| 2022 | 42 (12%) | 297 | 25 | 156 |
| 2021 | 52 (14%) | 297 | 16 | 133 |
| 2020 | 33 (9%) | 284 | 35 | 192 |
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 (117)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| SAN DIEGO, CITY OF | 1,385,379 | 0 |
| HELIX WATER DISTRICT | 277,668 | 0 |
| OTAY WATER DISTRICT | 238,008 | 0 |
| SWEETWATER AUTHORITY | 191,282 | 0 |
| OCEANSIDE, CITY OF | 171,483 | 0 |
| ESCONDIDO, CITY OF | 137,044 | 0 |
| VISTA IRRIGATION DISTRICT | 132,430 | 0 |
| VALLECITOS WD | 113,500 | 0 |
| CAL-AM WATER CORONADO | 106,000 | 2 |
| CARLSBAD MWD | 95,158 | 0 |
| OLIVENHAIN MWD | 86,458 | 0 |
| CITY OF SAN CLEMENTE | 51,545 | 0 |
| CAMP PENDLETON (SOUTH) | 42,219 | 16 |
| SAN DIEGUITO WD | 40,405 | 0 |
| RAMONA MUNICIPAL WD | 37,047 | 0 |
| NAS NORTH ISLAND & NAB CORONADO | 36,990 | 0 |
| LAKESIDE WD | 35,500 | 0 |
| FALLBROOK PUD | 35,237 | 0 |
| RINCON DEL DIABLO MWD (ID-1) | 30,757 | 0 |
| VALLEY CENTER MWD | 29,938 | 0 |
| RAINBOW MUNICIPAL WD | 23,536 | 0 |
| SANTA FE I.D. | 21,578 | 0 |
| Pala North | 14,280 | 45 |
| PALOMAR CHRISTIAN CONFERENCE CENTER | 13,050 | 0 |
| INDIAN HILLS CAMP | 13,032 | 38 |
| CAMP PENDLETON (NORTH) | 12,651 | 4 |
| Sycuan | 12,350 | 0 |
| LAKE HENSHAW RESORT INC. | 9,913 | 1 |
| Viejas Community System | 9,600 | 0 |
| Rincon Northern | 7,003 | 0 |
| Pauma | 5,700 | 0 |
| PALOMAR OBSERVATORY | 4,416 | 0 |
| DEL MAR, CITY OF | 3,919 | 0 |
| BORREGO WD | 3,429 | 0 |
| RINCON DEL DIABLO MWD (ID-A) | 3,275 | 0 |
| CUYAMACA WATER DISTRICT | 2,923 | 13 |
| PINE VALLEY MUTUAL WC | 2,645 | 16 |
| MAJESTIC PINES COMMUNITY SD | 1,768 | 1 |
| JULIAN COMMUNITY SERVICES DISTRICT | 1,517 | 1 |
| San Pasqual District A | 1,225 | 0 |
| Barona North | 1,171 | 0 |
| La Jolla Eastern | 1,076 | 0 |
| RANCHO PAUMA MUTUAL WC | 899 | 0 |
| YUIMA MUNICIPAL WATER DISTRICT IDA | 769 | 1 |
| PINE HILLS MUTUAL WATER COMPANY | 760 | 3 |
| San Pasqual District B | 705 | 0 |
| LAKE MORENA'S OAK SHORES MWC | 670 | 1 |
| JACUMBA COMMUNITY SD | 561 | 0 |
| CAMPO HILLS-COUNTY PUBLIC WORKS WASTEWTR | 500 | 0 |
| Campo Church Road System (HUD Homes) | 400 | 8 |
| TWIN LAKES RESORT | 400 | 73 |
| Pala South | 360 | 10 |
| YUIMA MUNICIPAL WATER DISTRICT | 360 | 1 |
| BUTTERFIELD RANCH | 353 | 13 |
| YMCA CAMP MARSTON/RAINTREE | 338 | 4 |
| DEL DIOS MUTUAL WATER COMPANY | 330 | 1 |
| Santa Ysabel Main | 325 | 11 |
| LIVE OAK SPRINGS WATER SYSTEM | 317 | 0 |
| Rincon Paradise Creek | 305 | 0 |
| BARRETT LAKE MH AND RV LLC | 300 | 8 |
| HEAVENLY OAKS | 300 | 0 |
| SAN PASQUAL ACADEMY | 298 | 0 |
| NORTH PEAK MUTUAL WATER COMPANY | 298 | 0 |
| La Jolla Western | 296 | 0 |
| RANCHO DEL CAMPO WATER SYSTEM | 290 | 0 |
| OAKVALE PARK | 260 | 27 |
| PINE VALLEY BIBLE CONFERENCE CENTER | 255 | 0 |
| NORTHCREST MOBILE HOME PARK | 250 | 0 |
| STONEYBROOKE VILLAGE MHP | 250 | 0 |
| LOS TULES MUTUAL WATER COMPANY | 238 | 0 |
| COTTONWOOD RIDGE MANUFACTURED HOUSING CO | 205 | 2 |
| RANCHO ESTATES MUTUAL WATER CO. | 200 | 8 |
| HIDDEN VALLEY OWNER LLC | 200 | 2 |
| PALOMAR MOUNTAIN MUTUAL WATER CO. | 193 | 0 |
| PAUMA VALLEY WATER COMPANY | 185 | 113 |
| SUNRISE ESTATES MUTUAL WATER COMPANY | 150 | 0 |
| PINE GROVE MOBILE HOME PARK | 142 | 0 |
| LAZY H MUTUAL WATER COMPANY | 142 | 0 |
| WYNOLA WATER DISTRICT | 140 | 0 |
| KINGS CANYON MOBILE HOME PARK | 120 | 3 |
| Los Coyotes | 114 | 20 |
| PORT OF CALL - WEST | 105 | 2 |
| Old Campo | 102 | 0 |
| RANCHO SANTA TERESA MW CO. | 102 | 32 |
| LAGUNA MOUNTAIN MUTUAL WATER CO. | 100 | 0 |
| GUATAY MUTUAL BENEFIT CORPORATION | 100 | 54 |
| OCOTILLO OASIS, LLC | 96 | 53 |
| TALL TIMBER TRAVEL TRAILER PARK | 95 | 0 |
| Mesa Grande - Black Canyon | 81 | 2 |
| OLD WEST MOBILE HOME PARK | 80 | 0 |
| CAMP STEVENS | 78 | 0 |
| La Posta Upper | 73 | 10 |
| RIVER RV RANCH | 71 | 2 |
| Arviso - Mobile Home Park | 70 | 2 |
| Turner Trailer Park | 70 | 3 |
| Wagon Wheel Mobile Home Park | 70 | 0 |
| Muro Trailer Park | 68 | 0 |
| SUNCREST MHP | 65 | 0 |
| South Campo | 63 | 0 |
| La Posta Lower Community | 60 | 0 |
| LA CIMA FIRE CENTER | 60 | 0 |
| KATHERINE RESORTS WATER COMPANY | 58 | 6 |
| San Felipe Water System | 52 | 0 |
| KINGSTON APARTMENTS | 50 | 0 |
| Mesa Grande (Tract 2) | 43 | 0 |
| HARDYVILLE ON THE RIVER | 42 | 0 |
| IMPERIAL LAKES INC. | 40 | 0 |
| MCKEE BRIDGE MOBILE HOME PARK | 40 | 91 |
| VIVOS XPOINT | 40 | 1 |
| Duro Water System | 35 | 0 |
| BLYTHE MOBILE HOME ESTATES | 35 | 0 |
| COTTAGE PARK APARTMENTS | 35 | 1 |
| RICHARDSON BEARDSLEY PARK INC. | 28 | 0 |
| PUERTA LA CRUZ CC #14 | 27 | 0 |
| RIVERFRONT MUTUAL WATER COMPANY | 25 | 0 |
| SAN DIEGO COUNTY WATER AUTHORITY | 0 | 1 |
| CARLSBAD DESALINATION PLANT | 0 | 0 |
TRI Facilities (50)
Superfund Sites (1)
| Site Name | Status | HRS Score |
|---|---|---|
| Camp Pendleton Marine Corps Base | NPL Site | 33.79 |
Cities in San Diego (44)
Frequently Asked Questions
What is the environmental risk level in San Diego, California? ▼
Are there Superfund sites in San Diego? ▼
How many toxic release facilities are in San Diego? ▼
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What environmental agencies cover San Diego? ▼
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.