PlainEnviro

Riverside, CA

High Risk (78/100)

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 Riverside in California · Population: 2,449,909

TRI sites such as Metal Container Corp-Mira Loma Can Plant; Imperial Western Products Inc; Newbasis LLC; SDWIS systems such as EASTERN MUNICIPAL WD; RIVERSIDE, CITY OF; COACHELLA VWD: COVE COMMUNITY; NPL sites such as Alark Hard Chrome; March Air Force Base; Stringfellow anchor Riverside, CA's EPA extract. Derived burden score 78/100 (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 Riverside total 1.0M lbs; health-flagged SDWIS rows include LAKE HEMET MWD; NORCO, CITY OF; BLYTHE - CITY OF, while Metal Container Corp-Mira Loma Can Plant leads TRI pounds. AQS median AQI 87 / peak 213 in 2024.

Largest TRI sites in the extract: Metal Container Corp-Mira Loma Can Plant; Imperial Western Products Inc; Newbasis LLC. Named SDWIS systems: EASTERN MUNICIPAL WD; RIVERSIDE, CITY OF; COACHELLA VWD: COVE COMMUNITY. NPL sites on record: Alark Hard Chrome; March Air Force Base; Stringfellow. Burden score 78/100 (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 Riverside, CA: EPA TRI 2023 reporting year

2022 → 2023

Same facilities, both years

-8.5%

44 facilities that filed in 2022 and 2023

Whole inventory

-9.3%

179.8 thousand lb → 163.1 thousand lb, every facility that filed

Between the two reporting years, 3 facilities filed for the first time and 4 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.

  • Riverside, CA's total reported releases fell from 178.2 thousand lb in 2022 to 163.1 thousand lb in 2023, based on EPA TRI filings.
  • Riverside, CA's land releases rose from 42 lb in 2022 to 497 lb in 2023, based on EPA TRI filings.
  • Riverside, CA's water releases rose from 10 lb in 2022 to 26 lb in 2023, based on EPA TRI filings.
  • Riverside, CA's air releases fell from 173.6 thousand lb in 2022 to 158.3 thousand lb in 2023, based on EPA TRI filings.
County population (Census ACS)
2,449,909
TRI Facilities
50
Water Systems
105
Superfund Sites
3
Total Releases
1.0M 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 43 (12%) 176 80 213
2023 62 (17%) 187 73 660
2022 41 (11%) 198 86 1683
2021 19 (5%) 210 89 329
2020 42 (11%) 179 98 584
2024 Good Air Quality: 12% of days
Unhealthy days: 147
Median AQI: 87

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 (105)

System System pop (SDWIS) Violations
EASTERN MUNICIPAL WD 666,581 0
RIVERSIDE, CITY OF 298,398 0
COACHELLA VWD: COVE COMMUNITY 270,000 0
ELSINORE VALLEY MWD 169,455 0
RANCHO CALIFORNIA WATER DISTRICT 146,147 0
JURUPA COMMUNITY SD 135,093 0
WESTERN MWD 86,062 0
INDIO WATER AUTHORITY 84,757 0
BEAUMONT CHERRY VALLEY WD 66,841 0
LAKE HEMET MWD 52,913 2
COACHELLA WATER AUTHORITY 43,590 0
MISSION SPRINGS WD 43,484 0
RUBIDOUX COMMUNITY SD 36,827 0
HEMET, CITY OF 33,828 0
BANNING, CITY OF 31,680 0
NORCO, CITY OF 25,068 1
TEMESCAL VALLEY WATER DISTRICT 21,971 0
SAN JACINTO, CITY OF 18,950 0
WESTERN MWD - MURRIETA DIVISION 17,453 0
Morongo 16,000 0
SOUTH MESA WC 10,108 0
BLYTHE - CITY OF 9,798 4
MYOMA DUNES MUTUAL WATER COMPANY 9,445 0
NUEVO WATER COMPANY 6,733 10
SANTA ANA RIVER WATER COMPANY 5,848 0
COACHELLA VWD: I.D. NO. 8 4,600 0
CALIFORNIA REHABILITATION CENTER - NORCO 4,300 0
CHUCKAWALLA VALLEY STATE PRISON 4,090 0
FARM MUTUAL W.C. (THE) 4,026 0
IDYLLWILD WATER DISTRICT 3,762 4
BOX SPRINGS MUTUAL WC 3,382 0
HOME GARDENS COUNTY WD 3,095 0
CABAZON WATER DISTRICT 2,010 0
PINE COVE WATER DISTRICT 1,540 0
GLEN IVY HOT SPRINGS 1,087 1
FERN VALLEY WD 900 0
PLANTATION ON THE LAKE PARK 897 0
Oasis Mobile Home Park 826 43
RIVERSIDE CSA #122-MESA VERDE 766 0
HIGH VALLEYS WATER DISTRICT 733 0
LAKE HEMET-GARNER VALLEY 709 0
CARVER TRACT MUTUAL WATER COMP 600 1
LAKE HEMET MWD-CAMP GROUND 600 0
BANNING HTS. MUTUAL WATER CO. 567 0
GLEN EDEN SUN CLUB 566 3
BLYTHE - MESA RANCH 558 0
CHIRIACO SUMMIT WATER DIST. 544 0
WEST PALM SPRINGS VILLAGE 517 0
GOLDEN ERA PRODUCTIONS 500 0
WARNER SPRINGS ESTATES 448 2
CSA 51 400 0
PALM SPRINGS CREST 399 0
BLYTHE - HIDDEN BEACHES 393 0
Torres-Martinez Clinic 379 3
SHARONDALE MESA HOA 340 0
RANCHO CALIMESA MOBILE HOME PARK 296 0
DD Mobile Home Park 275 27
RAMONA WATER COMPANY 250 29
MURRIETA PALMS MOBILE HOME PARK 237 0
PINYON PINES COUNTY WATER DIST 232 0
ANZA MUTUAL WATER COMPANY 224 1
CHERRY VALLEY WATER COMPANY 210 0
ANZA RV RESORT 203 0
ALPINE VILLAGE 198 31
WESTERN MWD (ID A - RAINBOW) 192 0
Santa Rosa Reservation 185 0
AMEZCUA - GARCIA WATER 170 7
THOMAS MOUNTAIN WATER COMPANY 157 1
STONE CREEK WATER COMPANY 152 1
DRAPER ESTATES WATER SYSTEM 123 3
OAK HAVEN ASSOCIATION 120 0
Torres-Martinez Avenue 64 110 1
PINYON CREST HOA 104 1
ANZA PINES MOBILE HOME PARK 90 0
MOUNTAIN CENTER CAFE 77 0
BRADFORD RUN RV 75 0
THERMAL PARK 73 3
BAUTISTA CC NO. 36 73 0
Montano Ranch 72 4
SOFTWINDS MOBILE HOME PARK 70 20
INDIAN OAKS TRAILER PARK 70 86
Toledo MHP 68 5
MT TERRACE MHP 60 9
TRAILS END MUTUAL WATER COMPANY 52 0
Ramon Zaragoza Water 51 0
Angelique Maelee Properties 50 15
GALINDO HOUSING FACILITY 50 0
37 MOBILE HOMES 50 17
Gamez MHP 48 0
El Mesquite MHP 48 0
Ruiz MHP 46 0
Rodriguez MHP 45 0
Castro Ranch 44 0
Gonzalez MHP 41 0
Ranchos Los Ferro MHP 41 0
Sandoval MHP 38 0
Vargas MHP 35 0
Indian Village 35 3
Arellano MHP 30 3
Desert Rose MHP 30 10
MAMMOTH POOL MOBILE HOME PARK 30 5
PARADISE VALLEY MWC 30 0
Barajas MHP 25 0
Garcia MHP 25 0
WESTERN MWD (ARLINGTON) 0 0

TRI Facilities (50)

# Facility Total Releases
1 Metal Container Corp-Mira Loma Can Plant 578.8K lbs
2 Imperial Western Products Inc 163.6K lbs
3 Newbasis LLC 77.7K lbs
4 Oldcastle Infrastructure Inc 74.3K lbs
5 Stremicks Heritage Foods 22.9K lbs
6 Qg Printing II LLC 16.7K lbs
7 Aoc L.L.C. 13.2K lbs
8 Anaco & Clow Valve 12.6K lbs
9 Infineon Technologies Americas Corp 12.1K lbs
10 Armtec Defense Technologies 7.7K lbs
11 Dura Coat Products Inc (axalta Coating Systems) 6.6K lbs
12 Qg Printing II LLC 5.2K lbs
13 Airgas Specialty Products-Riverside Ca 4.7K lbs
14 Ralphs Grocery Co-Riverside Distribution 3.9K lbs
15 G & B Fiberglass Products Co Inc 2.9K lbs
16 Carpenter Co 2.6K lbs
17 Pepsi Bottling Group LLC 2.1K lbs
18 Abbott Cardiovascular Systems Inc 2.0K lbs
19 Central Wire 741 lbs
20 3M Co - Corona 553 lbs
21 Plz Corp. 550 lbs
22 Tyco Electronics Corp 250 lbs
23 Rw Lyall & Co Inc 109 lbs
24 Wabash National L.P. 98 lbs
25 Moreno Valley Plant 2 86 lbs
26 Sun City Plant 8 70 lbs
27 Riverside Plant 1 65 lbs
28 Westlake Royal Roofing - Corona 64 lbs
29 Corona Plant 30 50 lbs
30 US Dod Usaf March Air Reserve Base 49 lbs
31 Murrieta Plant 27 46 lbs
32 Robertson's Ready Mix 43 lbs
33 Steris Inc 42 lbs
34 US Battery Mfg Co 40 lbs
35 McCrometer 17 lbs
36 Thousand Palms Plant 26 16 lbs
37 Cabazon Plant 11 9 lbs
38 Precision Stampings Solutions Inc. DBA Small Parts Inc. 9 lbs
39 Main Steel Polishing Co Inc 7 lbs
40 3V Fastners Co Inc 7 lbs
41 Robertsons San Jacinto Plant 7 lbs
42 Quikrete - Corona Ca Plant 5 lbs
43 Gs Polymers Inc. 4 lbs
44 Morgan Truck Body LLC Mca 3 lbs
45 Cemex Perris Plant 2 lbs
46 Oldcastle Precast Inc 1 lbs
47 Vulcan Materials Co Corona 0 lbs
48 Forterra Pipe & Precast - Riverside 0 lbs
49 1000PALMS Vista Chino Plant 0 lbs
50 Brooks Instrument 0 lbs

Superfund Sites (3)

Site Name Status HRS Score
Alark Hard Chrome NPL Site 50.50
March Air Force Base NPL Site 31.94
Stringfellow NPL Site 0.00

Cities in Riverside (37)

Riverside
17 facilities · 7 water
Corona
17 facilities · 5 water
Temecula
6 facilities · 4 water
Perris
5 facilities · 1 water
Hemet
2 facilities · 7 water
Coachella
2 facilities · 3 water
Beaumont
2 facilities · 1 water
Mira Loma
2 facilities · 1 water
Moreno Valley
2 facilities · 1 water
Sun City
2 facilities · 0 water
Thousand Palms
2 facilities · 0 water
Banning
1 facilities · 4 water
Jurupa Valley
1 facilities · 3 water
San Jacinto
1 facilities · 3 water
Cabazon
1 facilities · 1 water
Murrieta
1 facilities · 1 water
Nuevo
1 facilities · 1 water
March Arb
1 facilities · 0 water
Thermal
0 facilities · 17 water
Palm Desert
0 facilities · 6 water
Anza
0 facilities · 5 water
Idyllwild
0 facilities · 5 water
Calimesa
0 facilities · 4 water
Desert Hot Springs
0 facilities · 3 water
Mecca
0 facilities · 2 water
Norco
0 facilities · 2 water
Palm Springs
0 facilities · 2 water
Aguanga
0 facilities · 1 water
Bermuda Dunes
0 facilities · 1 water
Cherry Valley
0 facilities · 1 water
Chiriaco Summit
0 facilities · 1 water
Desert Center
0 facilities · 1 water
East Vale
0 facilities · 1 water
Lake Elsinore
0 facilities · 1 water
Temescal Valley
0 facilities · 1 water
Wildomar
0 facilities · 1 water
Glen Avon Heights
0 facilities · 0 water

Frequently Asked Questions

What is the environmental risk level in Riverside, California? ▼
Riverside, CA has an environmental risk score of 78/100 (High Risk), based on 50 TRI facilities, 3 Superfund sites, and 105 water systems on record. 33 water systems have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.
Are there Superfund sites in Riverside? ▼
Yes, Riverside, 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 Riverside? ▼
Riverside, CA has 50 TRI-reporting facilities on record with the EPA Toxic Release Inventory, with a combined total of 1.0M lbs in reported toxic releases. TRI facilities self-report annual chemical release data to the EPA.
What is the air quality in Riverside? ▼
In 2024, Riverside, CA recorded a median AQI of 87 and a peak AQI of 213. 12% 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 Riverside? ▼
Riverside, CA has 105 EPA-regulated water systems. 33 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 Riverside? ▼
Environmental compliance in Riverside, 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.

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How to Check Environmental Quality
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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