Riverside County, CA
The federal environmental record for Riverside County (population 2,492,442): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
3
Superfund NPL sites
19
federal cleanup sites
14
PFAS-detecting water systems
48
TRI facilities
79
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| Alark Hard Chrome | Riverside | on the NPL | 12/01/2000 |
| March Air Force Base | Riverside | on the NPL | 11/21/1989 |
| Stringfellow | Glen Avon Heights | on the NPL | 09/08/1983 |
Drinking water: PFAS testing
Public water systems serving Riverside with at least one PFAS detection under UCMR5. The federal limit for PFOA and PFOS is 4 ng/L; EPA proposed in May 2026 to rescind the limits for the other compounds, which are shown for information.
| System | Highest results | Reading |
|---|---|---|
| NORCO, CITY OF CA3310025 | PFOS: 31.4 ng/L PFBA: 17.9 ng/L PFHxS: 13.8 ng/L | above final limit |
| NUEVO WATER COMPANY CA3310026 | PFOA: 7 ng/L PFOS: 4.6 ng/L PFHxS: 4.4 ng/L | above final limit |
| WESTERN MWD - MURRIETA DIVISION CA3310036 | PFOS: 5.7 ng/L PFOA: 5.5 ng/L PFHxS: 4.1 ng/L | above final limit |
| RANCHO CALIFORNIA WATER DISTRICT CA3310038 | PFOS: 16 ng/L PFOA: 11 ng/L PFBA: 7.8 ng/L | above final limit |
| FARM MUTUAL W.C. (THE) CA3310046 | PFHxS: 5.1 ng/L PFOS: 4.3 ng/L PFOA: 4.2 ng/L | above final limit |
| BANNING, CITY OF CA3310006 | PFBA: 8 ng/L | detected |
| ELSINORE VALLEY MWD CA3310012 | PFBA: 7 ng/L | detected |
| SOUTH MESA WC CA3310017 | PFPeA: 8.9 ng/L PFHxA: 6.8 ng/L PFBS: 4.7 ng/L | detected |
| PERRIS, CITY OF CA3310029 | PFPeA: 25 ng/L PFHxA: 11 ng/L PFBA: 11 ng/L | detected |
| RIVERSIDE, CITY OF CA3310031 | PFPeA: 6.7 ng/L PFHxA: 4.1 ng/L PFOS: 4 ng/L | detected |
| CORONA, CITY OF CA3310037 | PFBA: 7.6 ng/L PFPeA: 6.1 ng/L PFHxA: 3.8 ng/L | detected |
| RUBIDOUX COMMUNITY SD CA3310044 | PFPeA: 28 ng/L PFBA: 22 ng/L PFHxA: 8.2 ng/L | detected |
| WESTERN MWD CA3310049 | PFPeA: 4.7 ng/L PFHxS: 3.4 ng/L PFBS: 3 ng/L | detected |
| CALIFORNIA REHABILITATION CENTER - NORCO CA3310800 | PFHxS: 3.5 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
48 facilities in Riverside filed TRI reports for 2024, totalling 145k lb released. The 25 largest by volume:
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| METAL CONTAINER CORP-MIRA LOMA CAN PLANT | JURUPA VALLEY | n-Butyl alcohol, Certain glycol ethers | 70k lb |
| IMPERIAL WESTERN PRODUCTS INC | COACHELLA | Ammonia, Methanol | 25k lb |
| OLDCASTLE INFRASTRUCTURE INC | NUEVO | Styrene, Lead compounds | 16k lb |
| NEWBASIS LLC | RIVERSIDE | Styrene, Dimethyl phthalate | 9k lb |
| AIRGAS SPECIALTY PRODUCTS-RIVERSIDE CA | RIVERSIDE | Ammonia | 7k lb |
| STREMICKS HERITAGE FOODS | RIVERSIDE | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Nitric acid | 4k lb |
| RALPHS GROCERY CO-RIVERSIDE DISTRIBUTION | RIVERSIDE | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 3k lb |
| AOC L.L.C. | PERRIS | Styrene, Dicyclopentadiene | 3k lb |
| BALDWIN RICHARDSON FOODS CO | CORONA | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 2k lb |
| ARMTEC DEFENSE TECHNOLOGIES | COACHELLA | Xylene (mixed isomers), Ethylbenzene | 2k lb |
| DURA COAT PRODUCTS INC (AXALTA COATING SYSTEMS) | RIVERSIDE | Certain glycol ethers, 1,2,4-Trimethylbenzene | 1k lb |
| CARPENTER CO | RIVERSIDE | Diisocyanates, Toluene diisocyanate (mixed isomers) | 941 lb |
| 3M CO - CORONA | CORONA | Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region), Zinc compounds | 777 lb |
| PLZ CORP. | RIVERSIDE | Certain glycol ethers | 545 lb |
| ABBOTT CARDIOVASCULAR SYSTEMS INC | TEMECULA | Methanol | 241 lb |
| CENTRAL WIRE | PERRIS | Nickel, Copper | 116 lb |
| OSI-RIVERSIDE | RIVERSIDE | Ammonia | 100 lb |
| US BATTERY MFG CO | CORONA | Lead And Lead Compounds | 18 lb |
| WESTLAKE ROYAL ROOFING - CORONA | CORONA | Manganese, Lead | 17 lb |
| SUN CITY PLANT 8 | SUN CITY | Lead compounds | 14 lb |
| US DOD USAF MARCH AIR RESERVE BASE | MARCH ARB | Ethylbenzene, Naphthalene | 14 lb |
| MORENO VALLEY PLANT 2 | MORENO VALLEY | Lead compounds | 13 lb |
| WABASH NATIONAL L.P. | MORENO VALLEY | Manganese, Chromium | 11 lb |
| RIVERSIDE PLANT 1 | RIVERSIDE | Lead compounds | 9 lb |
| ALL AMERICAN ASPHALT | PERRIS | Lead compounds, Polycyclic aromatic compounds | 9 lb |
Underground fuel tanks
EPA's UST Finder records 704 tank facilities in Riverside: 1,984 tanks in service and 48 closed. 1,358 fuel releases are on record, of which 79 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Riverside as Zone 2, moderate predicted indoor radon (2 to 4 pCi/L average). Radon and air quality are covered in depth on lung.com.
The record for one specific address
County figures blur what matters: distance. The Address Environmental Report runs these same federal datasets against one address and reports every site, tank, polluter and water result around it, with distances, in about a minute.
Get the report - $39All federal cleanup sites on file
The wider Superfund enterprise inventory (SEMS) for Riverside, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- ADVANCED FUELS FILTRATION SYSTEMSCORONA
- ALARK HARD CHROMERIVERSIDE
- AUCLAIR DUMP SITETHERMAL
- BANAIRE ENTERPRISESCABAZON,
- BLYTHE SANITARY LANDFILLBLYTHE
- CARBONLITE INDUSTRIES LLCRIVERSIDE
- DEVOE COATINGS CORIVERSIDE
- FAIRFIELD CHEMICALSRIVERSIDE
- HAMMOND UPRR DERAILMENTMECCA
- KAISER EAGLE MOUNTAINDESERT CENTER
- LISTON BRICK COMPANYCORONA
- MITCHELL AVENUE DRUG LABRIVERSIDE
- MORENO VALLEY TANK CARPERRIS
- NAVAL WPNS STATION SEAL BEACH DET. CORONANORCO
- PERRIS DRUM SITEPERRIS
- RIVERSIDE CEMENT CORIVERSIDE
- RIVERSIDE CHROME PLATING INCRIVERSIDE
- ROMOLAND MERCURY ERHEMET
- WYLE LABS - NORCO FACILITYNORCO