San Benito County, CA
The federal environmental record for San Benito County (population 68,175): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
1
Superfund NPL sites
1
federal cleanup sites
1
PFAS-detecting water systems
5
TRI facilities
0
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| New Idria Mercury Mine | Idria | on the NPL | 09/16/2011 |
Drinking water: PFAS testing
Public water systems serving San Benito 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 |
|---|---|---|
| SUNNYSLOPE COUNTY WATER DIST CA3510003 | PFOA: 5.8 ng/L PFOS: 5.1 ng/L PFHxA: 3.5 ng/L | above final limit |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
5 facilities in San Benito filed TRI reports for 2024, totalling 37k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| FUJIFILM ELECTRONIC MATERIALS USA INC. | HOLLISTER | N-Methyl-2-pyrrolidone, Ethylene glycol | 31k lb |
| PACIFIC SCIENTIFIC ENERGETICS MATERIALS CO CALIFORNIA | HOLLISTER | Lead And Lead Compounds | 3k lb |
| TRICAL INC | HOLLISTER | Chloropicrin, 1,3-Dichloropropylene | 3k lb |
| ROYAL CIRCUIT SOLUTIONS INC. | HOLLISTER | Lead And Lead Compounds | 22 lb |
| PRIDE CONVEYANCE SYSTEMS | HOLLISTER | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 23 tank facilities in San Benito: 57 tanks in service and 0 closed. 55 fuel releases are on record, of which 0 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps San Benito 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 San Benito, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- US BUREAU OF LAND MGMT VALLECITOS OILFLDHOLLISTER