Sonoma County, CA
The federal environmental record for Sonoma County (population 481,812): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
2
Superfund NPL sites
12
federal cleanup sites
5
PFAS-detecting water systems
11
TRI facilities
101
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| MGM Brakes | Cloverdale | deleted | 09/08/1983 |
| Sola Optical USA, Inc. | Petaluma | deleted | 02/21/1990 |
Drinking water: PFAS testing
Public water systems serving Sonoma 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 |
|---|---|---|
| SONOMA, CITY OF CA4910012 | PFOA: 6.2 ng/L PFHxA: 6.1 ng/L | above final limit |
| VALLEY OF THE MOON WATER DISTRICT CA4910013 | PFOS: 5.4 ng/L PFOA: 5.2 ng/L PFBS: 4.2 ng/L | above final limit |
| ROHNERT PARK, CITY OF CA4910014 | 6:2 FTS: 7.1 ng/L PFHxS: 5.7 ng/L PFOS: 4.5 ng/L | above final limit |
| HEALDSBURG, CITY OF CA4910005 | PFBS: 5.2 ng/L PFHxS: 4.5 ng/L PFDoA: 3.1 ng/L | detected |
| SEA RANCH WATER COMPANY,THE (PUC) CA4910007 | PFHxS: 3.3 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
11 facilities in Sonoma filed TRI reports for 2024, totalling 12k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| LGC BIOSEARCH TECHNOLOGIES INC | PETALUMA | Dichloromethane, Methanol | 6k lb |
| NORTHGATE READY MIX | WINDSOR | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Lead And Lead Compounds | 3k lb |
| NICK BARBIERI TRUCKING LLC | SANTA ROSA | Toluene, Xylene (mixed isomers) | 2k lb |
| PERDUE FOODS LLC - PETALUMA POULTRY PROCESSING PLANT | PETALUMA | Peracetic acid | 504 lb |
| CLOVER STORNETTA FARMS INC | PETALUMA | Peracetic acid | 221 lb |
| U.S. COAST GUARD TRAINING CENTER PETALUMA | PETALUMA | Lead | 200 lb |
| ITT CANNON LLC DBA BIW CONNECTOR SYSTEMS | SANTA ROSA | Lead compounds | 83 lb |
| KEYSIGHT TECHNOLOGIES INC | SANTA ROSA | Nitric acid | 10 lb |
| BODEAN CO INC | SANTA ROSA | Polycyclic aromatic compounds, Benzo[g,h,i]perylene | 0 lb |
| GENERAL HYDROPONICS | SANTA ROSA | - | 0 lb |
| PARKER HANNIFIN CORP EMN NA | ROHNERT PARK | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 166 tank facilities in Sonoma: 488 tanks in service and 0 closed. 1,204 fuel releases are on record, of which 101 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Sonoma as Zone 3, the lowest predicted indoor radon (under 2 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 Sonoma, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- BRADLEY PROPERTYSANTA ROSA
- ELTRA CORP C & D BATTERIES DIVSANTA ROSA
- FOUCHE AUTO WRECKERSSANTA ROSA
- GAMBONINI MERCURY MINEPETALUMA
- GEO OPERATOR CORP/UNIT 15GEYSERVILLE
- MILL CREEK CYLINDERSHEALDSBURG
- PETALUMA PRECEDENTPETALUMA
- PETER PAN CLEANERSSANTA ROSA
- SANTA ROSA RESIDENTIAL MERCURYSANTA ROSA
- SOLA OPTICAL USA, INC.PETALUMA
- USNAVY NAVSECGRUACT SKAGGS ISLANDSONOMA
- WEST AVENUE MERCURYSANTA ROSA