Orange, CA

High Risk (90/100)

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 Orange in California · Population: 3,164,063

TRI sites such as Xerxes Corp; Newport Fab LLC (dba Towerjazz); Ttm Technologies N.a. LLC; SDWIS systems such as CITY OF ANAHEIM; CITY OF SANTA ANA; CITY OF HUNTINGTON BEACH; NPL sites such as El Toro Marine Corps Air Station; McColl; Orange County North Basin anchor Orange, CA's EPA extract. Derived burden score 90/100 (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 Orange include CITY OF FULLERTON; TRABUCO CANYON WATER DISTRICT; BROOKSIDE VILLAGE MHP PWS, while Xerxes Corp leads reported TRI pounds among local Form R filers. AQS median AQI 54 / peak 172 in 2024.

Burden score 90/100 (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 Orange -- 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 Orange, CA: EPA TRI 2023 reporting year

2022 → 2023

Same facilities, both years

-15.4%

95 facilities that filed in 2022 and 2023

Whole inventory

-15.5%

505.6 thousand lb → 427.1 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.

  • Orange, CA's total reported releases fell from 503.4 thousand lb in 2022 to 425.8 thousand lb in 2023, based on EPA TRI filings.
  • Orange, CA's water releases fell from 300 lb in 2022 to 79 lb in 2023, based on EPA TRI filings.
  • Orange, CA's off-site transfers fell from 278.5 thousand lb in 2022 to 205.7 thousand lb in 2023, based on EPA TRI filings.
  • Orange, CA's chemicals reported rose from 51 in 2022 to 55 in 2023, based on EPA TRI filings.
County population (Census ACS)
3,164,063
TRI Facilities
50
Water Systems
93
Superfund Sites
4
Total Releases
2.4M 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 119 (33%) 231 13 172
2023 160 (44%) 195 9 166
2022 143 (39%) 215 5 156
2021 109 (30%) 238 18 148
2020 118 (32%) 207 28 218
2024 Good Air Quality: 33% of days
Unhealthy days: 16
Median AQI: 54

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 (93)

System System pop (SDWIS) Violations
CITY OF ANAHEIM 348,593 0
CITY OF SANTA ANA 310,539 0
CITY OF HUNTINGTON BEACH 201,000 0
CITY OF GARDEN GROVE 174,226 0
SANTA MARGARITA WATER DISTRICT 168,289 0
CITY OF FULLERTON 139,461 2
CITY OF ORANGE 120,770 0
GOLDEN STATE WC - WEST ORANGE COUNTY 114,379 0
MESA WATER DISTRICT 110,000 0
CITY OF WESTMINSTER 90,911 0
YORBA LINDA WATER DISTRICT 84,292 0
CITY OF BUENA PARK 81,998 0
CITY OF NEWPORT BEACH 68,572 0
CITY OF TUSTIN 66,600 0
GSWC - FLORENCE/GRAHAM 63,472 0
CITY OF LA HABRA 63,118 0
CITY OF FOUNTAIN VALLEY 56,747 0
GSWC - BELL, BELL GARDENS 55,050 0
EL TORO WATER DISTRICT 51,800 0
GSWC - ARTESIA 50,415 0
GOLDEN STATE WC - PLACENTIA/YORBA LINDA 50,381 0
CITY OF BREA 48,479 0
GSWC - NORWALK 43,167 0
SOUTH COAST WATER DISTRICT 41,118 0
SANTA MARGARITA WATER DISTRICT-ID9 39,684 0
CITY OF SEAL BEACH 24,937 0
LAGUNA BEACH COUNTY WD 18,404 0
CITY OF LA PALMA 15,948 0
TRABUCO CANYON WATER DISTRICT 13,659 1
GSWC - WILLOWBROOK 10,793 0
GSWC - HOLLYDALE 8,099 0
GOLDEN STATE WC - COWAN HEIGHTS 6,997 0
SERRANO WATER DISTRICT 5,659 0
LA HABRA HEIGHTS CWD 5,325 0
JOINT REGIONAL WATER SUPPLY SYSTEM 3,947 0
EAST ORANGE COUNTY WD - RZ 3,464 0
EASTSIDE WATER ASSOCIATION 2,000 0
BIG BASIN WATER COMPANY 1,120 0
OAK GLEN RETREAT 576 0
CABANA HOLIDAY WS 506 0
BROOKSIDE VILLAGE MHP PWS 475 1
HIDDEN HOLLOW MHC 400 0
SPIRIT MOUNTAIN UTILITY COMPANY 375 2
FOREST GLEN ESTATES MHP 367 0
EL DORADO MOBILE HOME PARK 318 0
RIVERDALE ESTATES 300 0
R&K WEIMAN MHP 279 1
LAKE WOHLFORD RESORT 250 1
MOUNTAIN VIEW MOBILE ESTATES, LLC 250 0
OAKS MOBILE HOME PARK 250 1
SONORA ESTATES MOBILE HOME PARK 235 0
DOT MHP 229 1
TAMARRON MOBILE HOME PARK 225 0
DINGERVILLE USA PARK 220 0
RANCHO CARRILLO MWC 210 3
EL DORADO WEST MHP 203 0
PINE VALLEY TRAILER PARK 200 54
ROLLING HILLS COMMUNITY, LLC 200 4
ALPINE OAKS ESTATES LLC 185 0
ORTEGA OAKS RV PARK&CAMPGROUND 180 43
APPLE VALLEY VILLAGE MHE 180 0
VICTORIA CREEK ESTATES 180 0
SHARP'S MOBILE HOME PARK 179 1
CARAVAN VILLAGE MHP 170 0
HYNES ESTATES MUTUAL WATER CO. 168 2
CAL ORE MOBILE ESTATES 146 0
EVERGREEN ESTATES 145 0
GREENBRIER ESTATES 142 0
OAKHURST MOBILE HOME ESTATES 138 1
ABRAMS LAKE MOBILE ESTATES 135 1
ROSELAND MOBILE HOME PARK 130 0
BROOKSIDE MOBILE HOME PARK 126 0
Thirty-Twenty Estates 125 0
PAGE AVENUE MUTUAL WATER COMPANY 119 3
MONETT VILLAGE 112 0
COUNTRYSIDE VILLAGE 108 0
PARADISE MOBILE ESTATES 106 0
KAMMERER MOBILE HOME PARK 100 0
ALTURAS FILLMORE MHP 99 0
RUSTIC ACRES MHP 90 2
COLUMBIA MOBILE HOME PARK 89 1
LIBERTY PARK WATER ASSOCIATION 85 12
BALDY MOUNTAIN RANCH 80 0
BOARDWALK MHC 71 0
NORTH SHORE TRAILER PARK 68 0
BARCELONA APARTMENTS 56 1
MEADOWLARK MOBILE HOME PARK 55 1
PONDEROSA MOBILE HOME PARK 52 2
TWIN CREEKS MOBILE AND RV VILLAGE 50 1
MINERVA MHP, LLC 45 0
TRAPPERS CROSSING SUBDIVISION 40 2
EAST ORANGE COUNTY WD - WZ 0 0
SMWD - SJ GROUND WATER PLANT 0 0

TRI Facilities (50)

# Facility Total Releases
1 Xerxes Corp 758.4K lbs
2 Newport Fab LLC (dba Towerjazz) 182.7K lbs
3 Ttm Technologies N.a. LLC 161.6K lbs
4 Howmet Global Fastening Systems Inc. 140.7K lbs
5 Newport Laminates Inc 111.5K lbs
6 Continuous Coating Corp 93.9K lbs
7 Coastline Metal Finishing 74.1K lbs
8 Triumph Processing-Embee Div 71.5K lbs
9 Hood Manufacturing Inc 66.6K lbs
10 Stremicks Heritage Foods 60.8K lbs
11 Air Industries Co a Pcc Co 56.7K lbs
12 Electronic Precision Specialties Inc 50.6K lbs
13 Ducommun Aerostructures Inc Orange Facility 47.7K lbs
14 Cherry Aerospace 43.0K lbs
15 Aluminum Precision Products Inc 42.0K lbs
16 Behr Process Corp - Garry & Yale 38.5K lbs
17 Graphic Packaging International 36.1K lbs
18 Summit Interconnect Inc. Orange 31.3K lbs
19 Trend Offset Printing Services Inc 25.8K lbs
20 Aluminum Precision Products Alton St Facility Div 23.2K lbs
21 Hixson Metal Finishing 21.7K lbs
22 Arlon Graphics LLC 20.5K lbs
23 Reid Metal Finishing 17.3K lbs
24 Summit Interconnect Inc 17.1K lbs
25 Bristol Industries LLC 14.3K lbs
26 Cytec Solvay Composite Materials Orange 12.6K lbs
27 Holcim Solutions & Products US LLC 12.2K lbs
28 Behr Process Corp - Alton 11.6K lbs
29 Brasstech Inc. 10.5K lbs
30 Griswold Industries 10.1K lbs
31 Kerr Dental Materials Center 9.9K lbs
32 Gkn Aerospace Transparency Systems Inc. 9.5K lbs
33 Northwest Pipe Co 9.4K lbs
34 Cytec Solvay Composite Materials Anaheim 9.1K lbs
35 Oakley Inc 8.8K lbs
36 Anillo Industries Inc. 8.2K lbs
37 Markland Manufacturing Inc. 7.3K lbs
38 Vista Paint Corp 7.2K lbs
39 Kinsbursky Brothers Supply Inc. 6.9K lbs
40 Arrowhead Products Corp 6.8K lbs
41 Pcc Rollmet Inc 5.8K lbs
42 Nor-Cal Beverage Co Inc. 5.5K lbs
43 Dynacast Inc 5.1K lbs
44 Uop LLC 5.0K lbs
45 Mitsubishi Chemical Carbon Fiber & Composites Inc 5.0K lbs
46 All Metals Processing of Orange County LLC 3.9K lbs
47 Ttm Technologies N.a. LLC 3.6K lbs
48 Brasstech Inc. 3.6K lbs
49 Stepan Co 2.9K lbs
50 Gallade Chemical Inc 2.5K lbs

Superfund Sites (4)

Site Name Status HRS Score
El Toro Marine Corps Air Station NPL Site 37.43
McColl NPL Site 41.77
Orange County North Basin NPL Site 50.00
Ralph Gray Trucking Co. Deleted NPL Site 35.04

Cities in Orange (37)

Santa Ana
29 facilities · 2 water
Anaheim
19 facilities · 11 water
Irvine
14 facilities · 12 water
Orange
13 facilities · 4 water
Huntington Beach
8 facilities · 5 water
Brea
7 facilities · 1 water
Fullerton
6 facilities · 2 water
Garden Grove
6 facilities · 2 water
Costa Mesa
3 facilities · 6 water
Buena Park
3 facilities · 2 water
Lake Forest
3 facilities · 2 water
Placentia
3 facilities · 1 water
Newport Beach
2 facilities · 10 water
Tustin
2 facilities · 4 water
Foothill Ranch
2 facilities · 0 water
Los Alamitos
2 facilities · 0 water
San Juan Capistrano
1 facilities · 4 water
Rancho Santa Margarita
1 facilities · 3 water
Fountain Valley
1 facilities · 1 water
La Habra
1 facilities · 1 water
Seal Beach
1 facilities · 1 water
Stanton
1 facilities · 0 water
Yorba Linda
0 facilities · 7 water
Mountain Center
0 facilities · 6 water
Laguna Beach
0 facilities · 5 water
Corona Del Mar
0 facilities · 2 water
Dana Point
0 facilities · 2 water
Ladera Ranch
0 facilities · 2 water
Westminster
0 facilities · 2 water
La Habra Heights
0 facilities · 1 water
La Palma
0 facilities · 1 water
Midway City
0 facilities · 1 water
Rancho Mission Viejo
0 facilities · 1 water
Trabuco Canyon
0 facilities · 1 water
Villa Park
0 facilities · 1 water
El Toro
0 facilities · 0 water
Orange County
0 facilities · 0 water

Frequently Asked Questions

What is the environmental risk level in Orange, California?
Orange, CA has an environmental risk score of 90/100 (High Risk), based on 50 TRI facilities, 4 Superfund sites, and 93 water systems on record. 25 water systems have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.
Are there Superfund sites in Orange?
Yes, Orange, CA has 4 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 Orange?
Orange, CA has 50 TRI-reporting facilities on record with the EPA Toxic Release Inventory, with a combined total of 2.4M lbs in reported toxic releases. TRI facilities self-report annual chemical release data to the EPA.
What is the air quality in Orange?
In 2024, Orange, CA recorded a median AQI of 54 and a peak AQI of 172. 33% 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 Orange?
Orange, CA has 93 EPA-regulated water systems. 25 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 Orange?
Environmental compliance in Orange, 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