Yolo County, CA
The federal environmental record for Yolo County (population 220,544): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
1
Superfund NPL sites
5
federal cleanup sites
1
PFAS-detecting water systems
5
TRI facilities
14
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| Frontier Fertilizer | Davis | on the NPL | 05/31/1994 |
Drinking water: PFAS testing
Public water systems serving Yolo 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 |
|---|---|---|
| CITY OF WINTERS CA5710005 | PFNA: 4.2 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
5 facilities in Yolo filed TRI reports for 2024, totalling 2k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| WATTS REGULATOR CO. | WOODLAND | Chromium, Nickel | 2k lb |
| VERITIV OPERATING CO - CA515 WEST SACRAMENTO | WEST SACRAMENTO | Diisocyanates | 22 lb |
| CEMEX CONSTRUCTION MATERIALS PACIFIC LLC | WEST SACRAMENTO | - | 0 lb |
| PAVESTONE - WINTERS CA PLANT | WINTERS | Lead | 0 lb |
| WOODLAND WOOD PRESERVERS LTD. | WOODLAND | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 97 tank facilities in Yolo: 294 tanks in service and 2 closed. 290 fuel releases are on record, of which 14 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Yolo 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 Yolo, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- DAVIS TRANSMITTER SITEDAVIS
- FRONTIER FERTILIZERDAVIS
- LABORATORY FOR ENERGY-RELATED HEALTH RESEARCHDAVIS
- SACRAMENTO PLATINGWEST SACRAMENTO
- USDA ARS CA UNIVERSITY OF CALIFORNIA DAVISDAVIS