Clay County, MN
The federal environmental record for Clay County (population 66,258): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
0
Superfund NPL sites
0
federal cleanup sites
2
PFAS-detecting water systems
2
TRI facilities
5
open tank releases
Drinking water: PFAS testing
Public water systems serving Clay 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 |
|---|---|---|
| Dilworth MN1140003 | PFBA: 7.3 ng/L | detected |
| Moorhead MN1140008 | PFBA: 7.6 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
2 facilities in Clay filed TRI reports for 2024, totalling 285k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| AMERICAN CRYSTAL SUGAR CO | MOORHEAD | Ammonia, Methanol | 285k lb |
| FORTERRA CONCRETE PRODUCTS - HAWLEY | HAWLEY | Lead | 0 lb |
Underground fuel tanks
EPA's UST Finder records 152 tank facilities in Clay: 104 tanks in service and 387 closed. 131 fuel releases are on record, of which 5 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Clay as Zone 1, the highest predicted indoor radon levels (over 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 - $39