San Diego, CA

High Risk (76/100)

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

2022 → 2023

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.
County population (Census ACS)
3,282,782
TRI Facilities
50
Water Systems
117
Superfund Sites
1
Total Releases
6.2M lbs

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
2024 Good Air Quality: 13% of days
Unhealthy days: 52
Median AQI: 71

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)

# Facility Total Releases
1 US Marine Corps Mcb Camp Pendleton 3.3M lbs
2 General Dynamics (nassco) 812.7K lbs
3 Bae Systems San Diego Ship Repair 397.8K lbs
4 Sumitomo Electric Interconnect Products Inc 393.7K lbs
5 Gkn Aerospace Chem-Tronics Inc 351.0K lbs
6 U.S. Naval Air Station North Island 206.9K lbs
7 US Marine Corps Air Station Miramar 151.3K lbs
8 US Navy Silver Strand Training Complex (sstc) 81.7K lbs
9 US Cbp Border Patrol Firearms Range Be # CA0180 64.8K lbs
10 US Navy Camp Michael Monsoor - la Posta (ranges) (part) 62.8K lbs
11 Hydranautics 51.2K lbs
12 Solar Turbines Inc Harbor Drive 35.5K lbs
13 Rohr Inc a Collins Aerospace Co 34.9K lbs
14 Solecta Inc. 33.6K lbs
15 Integrated Dna Technologies 32.6K lbs
16 Polypeptide Laboratories San Diego 31.8K lbs
17 San Diego Galvanizing Inc 16.0K lbs
18 US Naval Submarine Base San Diego 15.0K lbs
19 Watkins Manufacturing 14.8K lbs
20 Illumina 13.9K lbs
21 Saint Gobain Solar Gard LLC 11.4K lbs
22 Piercan USA Inc. 11.1K lbs
23 Sherwin-Williams Co 9.0K lbs
24 US Cbp Boulevard Border Patrol Station #CA11560 8.9K lbs
25 Ademco Inc 6.4K lbs
26 Vision Systems Inc. 6.3K lbs
27 Somacis Inc 5.1K lbs
28 Costco Optical Lab #908 4.8K lbs
29 Tesoro - San Diego Terminal 4.5K lbs
30 California Crafted Marble Inc 4.5K lbs
31 Integrated Dna Technologies 4.2K lbs
32 Kyocera International Inc 3.9K lbs
33 Designer Molecules Inc 3.6K lbs
34 Bachem Americas Inc. 3.6K lbs
35 U.s Coast Guard Sector San Diego Ca 3.5K lbs
36 Teledyne Instruments Inc. DBA Teledyne Rd Instruments 2.1K lbs
37 Cp Kelco 1.9K lbs
38 Teledyne Instruments Inc DBA Teledyne Impulse 1.5K lbs
39 K-Tube Corp 1.2K lbs
40 Quidel Inc 1.1K lbs
41 Chevron San Diego Terminal 857 lbs
42 Senior Aerospace Ketema Div 663 lbs
43 Ttm Technologies N.a. LLC 563 lbs
44 New Leaf Biofuel 472 lbs
45 Mitsubishi Chemical Carbon Fiber & Composites I 440 lbs
46 Pacira Pharmaceuticals Inc 293 lbs
47 U.S. Naval Base San Diego 184 lbs
48 Ametek Programmable Power 181 lbs
49 Survival Systems International Inc 141 lbs
50 Versum Materials US LLC 69 lbs

Superfund Sites (1)

Site Name Status HRS Score
Camp Pendleton Marine Corps Base NPL Site 33.79

Cities in San Diego (44)

San Diego
50 facilities · 15 water
San Marcos
5 facilities · 2 water
El Cajon
5 facilities · 1 water
Oceanside
5 facilities · 1 water
Poway
5 facilities · 1 water
Escondido
4 facilities · 6 water
Carlsbad
4 facilities · 2 water
Santee
2 facilities · 3 water
Vista
2 facilities · 2 water
Chula Vista
2 facilities · 1 water
National City
2 facilities · 0 water
Valley Center
1 facilities · 8 water
Campo
1 facilities · 4 water
Boulevard
1 facilities · 2 water
Camp Pendleton
1 facilities · 2 water
Lakeside
1 facilities · 2 water
Coronado
1 facilities · 0 water
Pauma Valley
0 facilities · 10 water
Julian
0 facilities · 9 water
Santa Ysabel
0 facilities · 5 water
Spring Valley
0 facilities · 5 water
Alpine
0 facilities · 4 water
Encinitas
0 facilities · 3 water
Pala
0 facilities · 3 water
Rancho Santa Fe
0 facilities · 3 water
Warner Springs
0 facilities · 3 water
Bonita
0 facilities · 2 water
Del Mar
0 facilities · 2 water
Fallbrook
0 facilities · 2 water
Jamul
0 facilities · 2 water
La Jolla
0 facilities · 2 water
La Mesa
0 facilities · 2 water
Palomar Mountain
0 facilities · 2 water
Pine Valley
0 facilities · 2 water
Ramona
0 facilities · 2 water
Borrego Springs
0 facilities · 1 water
Guatay
0 facilities · 1 water
Imperial Beach
0 facilities · 1 water
Jacumba
0 facilities · 1 water
Mt Laguna
0 facilities · 1 water
Rancho Sante Fe
0 facilities · 1 water
San Clemente
0 facilities · 1 water
San Ysabel
0 facilities · 1 water
San Diego County
0 facilities · 0 water

Frequently Asked Questions

What is the environmental risk level in San Diego, California?
San Diego, CA has an environmental risk score of 76/100 (High Risk), based on 50 TRI facilities, 1 Superfund sites, and 117 water systems on record. 43 water systems have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.
Are there Superfund sites in San Diego?
Yes, San Diego, CA has 1 Superfund site on the EPA National Priorities List (NPL). Superfund sites are contaminated locations that require long-term cleanup under the EPA Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).
How many toxic release facilities are in San Diego?
San Diego, CA has 50 TRI-reporting facilities on record with the EPA Toxic Release Inventory, with a combined total of 6.2M lbs in reported toxic releases. TRI facilities self-report annual chemical release data to the EPA.
What is the air quality in San Diego?
In 2024, San Diego, CA recorded a median AQI of 71 and a peak AQI of 161. 13% of monitored days had "Good" air quality (AQI 0–50). Source: EPA Air Quality System (AQS) Annual AQI by County.
Is the drinking water safe in San Diego?
San Diego, CA has 117 EPA-regulated water systems. 43 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 agencies cover San Diego?
Environmental compliance in San Diego, California is overseen by the U.S. Environmental Protection Agency (EPA) at the federal level and the California state environmental agency. Facilities report to the EPA Toxic Release Inventory, water systems are regulated under the Safe Drinking Water Act, and contaminated sites are managed under the Superfund program. Contact your state environmental agency for local concerns.

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.

Related

Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro