Orange, CA

High Risk (70/100)

A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology.

Environmental data for Orange in California · Population: 3,164,063

Orange, CA is tracked across three EPA datasets covering 50 Toxics Release Inventory (TRI) facilities, 96 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 70/100 (High Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.

Industrial disclosures inside the county total 2.4M lbs of reported toxic releases under EPCRA Section 313, while 26 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 54 and a peak AQI of 172 in 2024, with 33% of observed days rated "Good" (0–50).

All figures below draw directly from federal EPA records, TRI self-reported emissions, SDWIS compliance history, NPL Hazard Ranking System scores, and AQS daily AQI summaries, and are not adjusted, weighted, or forecast. A past violation or elevated score does not itself indicate current unsafe conditions; it documents the regulatory and disclosure history publicly filed with the U.S. Environmental Protection Agency through the most recent reporting cycle.

Population
3,164,063
TRI Facilities
50
Water Systems
96
Superfund Sites
0
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 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 Population 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 63,500 0
CITY OF LA HABRA 63,118 0
CITY OF FOUNTAIN VALLEY 56,747 0
GSWC - BELL, BELL GARDENS 54,877 0
EL TORO WATER DISTRICT 51,800 0
GOLDEN STATE WC - PLACENTIA/YORBA LINDA 50,381 0
GSWC - ARTESIA 50,375 0
CITY OF BREA 48,479 0
GSWC - NORWALK 43,176 0
SOUTH COAST WATER DISTRICT 41,118 0
SANTA MARGARITA WATER DISTRICT-ID9 39,684 0
GSWC - CULVER CITY 38,213 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 10,747 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
DELTA MOBILE HOME PK & APT 230 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
SHARP'S MOBILE HOME PARK 179 1
CARAVAN VILLAGE MHP 170 0
HYNES ESTATES MUTUAL WATER CO. 168 2
TABLE ROCK MOBILE ESTATES (SOUTH) 150 0
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
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
RESTHAVEN MOBILE HOME PARK 99 31
BEND MOBILEHOME & RV PARK 99 0
ALTURAS FILLMORE MHP 99 0
RUSTIC ACRES MHP 90 2
COLUMBIA MOBILE HOME PARK 89 1
LIBERTY PARK WATER ASSOCIATION 85 12
ST WILLIAMS MOBILE HOME PARK 82 6
BALDY MOUNTAIN RANCH 80 0
BOARDWALK MHC 71 0
LASSEN MOBILE HOME PARK 62 0
BARCELONA APARTMENTS 56 1
MEADOWLARK MOBILE HOME PARK 55 1
TWIN CREEKS MOBILE AND RV VILLAGE 50 1
TABLE ROCK MOBILE ESTATES (NORTH) 50 0
MINERVA MHP, LLC 45 0
TRAPPERS CROSSING SUBDIVISION 40 1
EAST ORANGE COUNTY WD - WZ 0 0
SAN JUAN BASIN AUTHORITY 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

Cities in Orange (24)

Buena Park
Pop: -
3 facilities · 2 water
La Habra
Pop: -
1 facilities · 1 water
Stanton
Pop: -
1 facilities · 0 water
Los Alamitos
Pop: -
2 facilities · 0 water
Seal Beach
Pop: -
1 facilities · 1 water
Irvine
Pop: -
14 facilities · 15 water
Foothill Ranch
Pop: -
2 facilities · 0 water
Lake Forest
Pop: -
3 facilities · 2 water
Brea
Pop: -
7 facilities · 1 water
Costa Mesa
Pop: -
3 facilities · 5 water
Fullerton
Pop: -
6 facilities · 2 water
Garden Grove
Pop: -
6 facilities · 2 water
Huntington Beach
Pop: -
8 facilities · 5 water
Newport Beach
Pop: -
2 facilities · 9 water
Orange
Pop: -
13 facilities · 4 water
San Juan Capistrano
Pop: -
1 facilities · 4 water
Santa Ana
Pop: -
29 facilities · 2 water
Fountain Valley
Pop: -
1 facilities · 1 water
Tustin
Pop: -
2 facilities · 7 water
Anaheim
Pop: -
19 facilities · 12 water
Placentia
Pop: -
3 facilities · 1 water
Rancho Santa Margarita
Pop: -
1 facilities · 3 water
El Toro
Pop: -
0 facilities · 0 water
Orange County
Pop: -
0 facilities · 0 water

Frequently Asked Questions

What is the environmental risk level in Orange, California?
Orange, CA has an environmental risk score of 70/100 (High Risk), based on 50 TRI facilities, 0 Superfund sites, and 96 water systems on record. 26 water systems have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.
Are there Superfund sites in Orange?
No Superfund National Priorities List (NPL) sites are currently registered in Orange, CA in the EPA database.
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 96 EPA-regulated water systems. 26 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 Editorial