Delaware County, OK
The federal environmental record for Delaware County (population 41,703): 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
1
PFAS-detecting water systems
1
TRI facilities
1
open tank releases
Drinking water: PFAS testing
Public water systems serving Delaware 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 |
|---|---|---|
| DELAWARE CO RWD # 7 OK3002138 | PFBA: 6.7 ng/L PFPeA: 3.2 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
1 facilities in Delaware filed TRI reports for 2024, totalling 39k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| PRIDE PLATING INC | GROVE | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region) | 39k lb |
Underground fuel tanks
EPA's UST Finder records 108 tank facilities in Delaware: 78 tanks in service and 180 closed. 22 fuel releases are on record, of which 1 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Delaware 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 - $39