PlainEnviro

San Joaquin, CA

High Risk (81/100)

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.

Environmental data for San Joaquin in California · Population: 787,416

TRI sites such as J R Simplot Co Lathrop; Owens-Brockway Glass Container Inc Plant #22; California Natural Products; SDWIS systems such as CITY OF STOCKTON; TRACY, CITY OF; MANTECA, CITY OF; NPL sites such as McCormick & Baxter Creosoting Co.; Sharpe Army Depot; Tracy Defense Depot (USARMY) anchor San Joaquin, CA's EPA extract. Derived burden score 81/100 (High Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.

Health-flagged SDWIS rows in San Joaquin include CITY OF STOCKTON; TRACY, CITY OF; CDCR CALIFORNIA HEALTH CARE FACILITY, while J R Simplot Co Lathrop leads reported TRI pounds among local Form R filers. AQS median AQI 51 / peak 140 in 2024.

Burden score 81/100 (High Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for San Joaquin -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.

Release-over-release change

What changed for San Joaquin, CA: EPA TRI 2023 reporting year

2022 → 2023

Same facilities, both years

+19.0%

31 facilities that filed in 2022 and 2023

Whole inventory

+17.8%

41.8 thousand lb → 49.2 thousand lb, every facility that filed

Between the two reporting years, 2 facilities filed for the first time and 5 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.

  • San Joaquin, CA's total reported releases rose from 41.4 thousand lb in 2022 to 49.2 thousand lb in 2023, based on EPA TRI filings.
  • San Joaquin, CA's off-site transfers rose from 7.6 thousand lb in 2022 to 20.8 thousand lb in 2023, based on EPA TRI filings.
  • San Joaquin, CA's land releases fell from 21.0 thousand lb in 2022 to 17.5 thousand lb in 2023, based on EPA TRI filings.
  • San Joaquin, CA's air releases fell from 12.8 thousand lb in 2022 to 10.9 thousand lb in 2023, based on EPA TRI filings.
County population (Census ACS)
787,416
TRI Facilities
49
Water Systems
96
Superfund Sites
3
Total Releases
209.3K 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 178 (49%) 177 11 140
2023 208 (57%) 148 9 119
2022 192 (53%) 164 8 208
2021 140 (38%) 209 15 153
2020 162 (44%) 173 16 215
2024 Good Air Quality: 49% of days
Unhealthy days: 11
Median AQI: 51

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 (96)

System System pop (SDWIS) Violations
CITY OF STOCKTON 191,302 17
TRACY, CITY OF 96,609 3
MANTECA, CITY OF 84,928 0
LODI, CITY OF 68,272 0
CITY OF LATHROP 35,080 0
RIPON, CITY OF 15,741 0
ESCALON, CITY OF 7,429 0
SAN JOAQUIN COUNTY - LINCOLN VILLAGE 5,841 0
CDCR CALIFORNIA HEALTH CARE FACILITY 5,551 16
SAN JOAQUIN COUNTY-MOKELUMNE ACRES 3,802 0
LOCKEFORD COMMUNITY SERV. DIST. 3,572 0
SAN JOAQUIN COUNTY - COLONIAL HEIGHTS 1,841 0
LINDEN COUNTY WATER DISTRICT 1,784 0
LITTLE POTATO SLOUGH MUTUAL 1,510 5
FAIROAKS PWS #44 1,172 0
SAN JOAQUIN COUNTY-RAYMUS VILLAGE 1,086 19
SAN JOAQUIN COUNTY - THORNTON 964 0
SAN JOAQUIN COUNTY - WILKINSON MANOR 851 0
STOCKTON VERDE MOBILE HOME PARK 711 1
SNOWSHOE SPRINGS ASSN. 686 3
SAN JOAQUIN RIVER CLUB INC 600 0
MORADA ESTATES N PWS #46 426 0
BEL AIR MOBILE ESTATE 325 0
DOUBLE L MOBILE ESTATES 320 0
SANTOS RANCH PWS #5-CSA #35 320 0
SAN JOAQUIN WATER WORKS #2 310 0
MORADA ESTATES PWS 290 0
PEPPERMINT CREEK MHP 280 1
ROUGH & READY VILLAGE 268 0
CLEMENTS WATER WORKS #43 264 0
RIVERLAND MOBILEHOME PARK 260 0
CAL 20 VILLAGE AND MEADOW POINTE PARK 255 0
132 INVESTMENTS WATER SYSTEM 252 2
SHADED TERRACE PWS 238 0
TWIN OAKS MOBILE PARK 238 0
KING ISLAND TRAILER PARK WATER SYSTEM 236 0
ELKHORN ESTATES WATER SYSTEM 234 0
ACAMPO WATER SYSTEM 231 0
CAPELL VALLEY ESTATES 208 5
CASA DE AMIGOS MANUFACTURED HOUSING COMM 204 0
SAN JUAN VISTA 201 0
BETHEL ISLAND MHC 185 0
CARIBOU MOBILE PARK PWS 180 0
GAYLA MANOR PWS 178 0
PAR COUNTRY ESTATES CSA-16 178 0
WESTERN MOBILE HOME PARK 178 1
RANCHO SAN JOAQUIN WATER SYS 172 0
PLAZA MOBILE HOME PARK 169 1
OLIVE LANE MOBILEHOME PARK 153 0
BUEHNER WATER SYSTEM 150 2
SECURITY MHP 150 1
FAIRWAY ESTATES PWS CSA-18 149 0
CURRIER ESTATES WATER CORP 148 0
MULBERRY MHP 148 0
CORRAL HOLLOW PWS 145 0
GOLD BEACH PARK 134 8
WILKINSON MANOR A-ZONE PWS 125 0
QUIET OAKS MOBILE HOME PARK 120 102
BIG WHEEL MOBILE HOME PARK 120 1
AMBERWOOD ESTATES, LLC 120 0
SPRING CREEK ESTATES PWS 119 0
MORADA MANOR WATER SYSTEM 112 2
DEL RIO EAST HOA WATER SYSTEM 110 0
WALNUT ACRES 106 0
MORADA ACRES WATER SYSTEM 105 0
LODI LAKE MOBILE HOME PARK 104 0
HAVEN ACRES RIVER CLUB INC 100 0
CHERRY LANE TRAILER PARK 100 0
DESERT MOBILE HOME ESTATES 100 3
MAURLAND MANOR WATER SYSTEM 92 0
A1 WINSTONS MOBILE HOME PARK 75 1
COUNTRY CLUB VISTA MUTUAL WATER CO 75 0
WAYSIDE MOTEL APARTMENTS WTR SYS 70 0
SUNNYSIDE ESTATES WATER SYSTEM 69 0
MARY LOU MOBILE HOME PARK 68 0
EVERGREEN MOBILE ESTATES 65 0
FOREST POINT MHC 62 0
OAKMONT WATER SYSTEM 61 0
ALMOND PARK WATER SYSTEM 60 0
EL RIO MOBILE HOME PARK 60 0
RENO SAHARA TRAILER PARK 60 0
15TH AVENUE 50 0
STOCKTON EAST WATER DISTRICT 50 1
HAYNES BOARD & CARE HOME 41 2
WINE COUNTRY APARTMENTS 40 0
LA TORRES PARK 40 1
LODI HOMES 39 0
ENCLAVE AT THE DELTA 39 2
FREMONT ONE 39 24
HANOT FOUNDATION INC 38 0
MAZE BLVD MOBILEHOME PARK 36 0
V & P TRAILER COURT WATER SYSTEM 35 8
CARDOZA VILLA CORP 30 1
MARTINEZ APARTMENTS 26 41
BUEHNER HOUSES 25 4
SOUTH SAN JOAQUIN IRRIGATION DISTRICT 25 0

TRI Facilities (49)

# Facility Total Releases
1 J R Simplot Co Lathrop 74.9K lbs
2 Owens-Brockway Glass Container Inc Plant #22 27.8K lbs
3 California Natural Products 25.3K lbs
4 Cbc Steel Buildings 18.0K lbs
5 Tesla Inc 17.3K lbs
6 Tesoro - Stockton Terminal 8.5K lbs
7 Pacific Ethanol Stockton LLC 7.6K lbs
8 US Doe Llnl Experimental Test Site (site 300) 6.6K lbs
9 Westlake Royal Roofing - French Camp 4.1K lbs
10 Westlake Royal Roofing - Lathrop 3.9K lbs
11 Barbosa Cabinets 3.4K lbs
12 Gcp Applied Technologies Inc 1.8K lbs
13 Leprino Foods Co 1.8K lbs
14 Canary Renewables Corp 1.4K lbs
15 Equilon Stockton Terminal 1.3K lbs
16 Hogan Manufacturing Inc 1.1K lbs
17 Thatcher Co of California Inc 926 lbs
18 Schuff Steel Co 814 lbs
19 Concrete Inc 590 lbs
20 Gaf Materials Mfg LLC 484 lbs
21 Valimet Inc 270 lbs
22 Northwest Pipe Co 267 lbs
23 Stockton Steel 257 lbs
24 Hogan Manufacturing Inc Lift-U Div 240 lbs
25 Marble Palace 224 lbs
26 Concrete Inc 124 lbs
27 Oldcastle Precast Inc 89 lbs
28 Oldcastle Infrastructures Inc 72 lbs
29 Hj Baker & Bro LLC 55 lbs
30 Leggett & Platt Urethane Div Branch 6014 10 lbs
31 Kent's Oil Service Inc. 9 lbs
32 Oldcastle Pacific Stockton 1 lbs
33 Pioneer Americas LLC D/b/a Olin Chlor Alkali Products Tracy 1 lbs
34 Basalite 0 lbs
35 Custom Building Products - Sckc Stockton Ca 0 lbs
36 Oldcastle Pacific Tracy-Oldcastle Apg 0 lbs
37 Calaveras Materials Inc - Lathrop Rmc 0 lbs
38 Calportland Tracy Rmc 0 lbs
39 Jensen Precast 0 lbs
40 Dynatect Ro-Lab Inc. 0 lbs
41 Westway Feed Products LLC 0 lbs
42 Cargill Feed & Nutrition Stockton 0 lbs
43 Chemstation of Northern California 0 lbs
44 Shepard Bros Inc - Stockton 0 lbs
45 Cemex Stockton Plant 0 lbs
46 Cmc Rebar Tracy 0 lbs
47 Cemex Tracy 0 lbs
48 Surtec Inc. 0 lbs
49 Sunny Valley Smoked Meats 0 lbs

Superfund Sites (3)

Site Name Status HRS Score
McCormick & Baxter Creosoting Co. NPL Site 74.86
Sharpe Army Depot NPL Site 42.24
Tracy Defense Depot (USARMY) NPL Site 37.16

Cities in San Joaquin (12)

Stockton
21 facilities · 71 water
Tracy
16 facilities · 9 water
Lathrop
6 facilities · 2 water
Escalon
2 facilities · 1 water
French Camp
2 facilities · 1 water
Lockeford
1 facilities · 3 water
Manteca
1 facilities · 2 water
Lodi
0 facilities · 4 water
Ripon
0 facilities · 2 water
Woodbridge
0 facilities · 2 water
Acampo
0 facilities · 1 water
Linden
0 facilities · 1 water

Frequently Asked Questions

What is the environmental risk level in San Joaquin, California? ▼
San Joaquin, CA has an environmental risk score of 81/100 (High Risk), based on 49 TRI facilities, 3 Superfund sites, and 96 water systems on record. 29 water systems have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.
Are there Superfund sites in San Joaquin? ▼
Yes, San Joaquin, CA has 3 Superfund sites 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 Joaquin? ▼
San Joaquin, CA has 49 TRI-reporting facilities on record with the EPA Toxic Release Inventory, with a combined total of 209.3K lbs in reported toxic releases. TRI facilities self-report annual chemical release data to the EPA.
What is the air quality in San Joaquin? ▼
In 2024, San Joaquin, CA recorded a median AQI of 51 and a peak AQI of 140. 49% 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 Joaquin? ▼
San Joaquin, CA has 96 EPA-regulated water systems. 29 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 Joaquin? ▼
Environmental compliance in San Joaquin, 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 Guides

Understanding EPA Data
How EPA collects and publishes environmental data
Environmental Justice
Who lives near polluters and environmental hazards
How to Check Environmental Quality
Step-by-step guide to checking your local environment

Read our methodology - how this data is sourced, computed, and verified.

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