Delaware County, NY
The federal environmental record for Delaware County (population 44,410): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
3
Superfund NPL sites
8
federal cleanup sites
1
PFAS-detecting water systems
5
TRI facilities
1
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| GCL Tie and Treating Inc. | Village of Sidney | on the NPL | 05/31/1994 |
| Richardson Hill Road Landfill/Pond | Sidney Center | on the NPL | 07/22/1987 |
| Sidney Landfill | Sidney | on the NPL | 03/31/1989 |
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 |
|---|---|---|
| SIDNEY VILLAGE NY1200270 | PFOA: 10.4 ng/L PFHxS: 8.6 ng/L PFOS: 7.1 ng/L | above final limit |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
5 facilities in Delaware filed TRI reports for 2024, totalling 163k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| AMPHENOL CORP | SIDNEY | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Nickel compounds | 113k lb |
| SAPUTO CHEESE USA INC. | DELHI | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 38k lb |
| LACTALIS HERITAGE DAIRY CORP | WALTON | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 6k lb |
| FRIESLAND CAMPINA | DELHI | Toluene | 6k lb |
| AMPHENOL CORP | SIDNEY | Copper, Lead | 36 lb |
Underground fuel tanks
EPA's UST Finder records 289 tank facilities in Delaware: 207 tanks in service and 857 closed. 202 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 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 - $39All federal cleanup sites on file
The wider Superfund enterprise inventory (SEMS) for Delaware, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- CADOSIA LUMBERHANCOCK
- DEPOSIT TRAIN DERAILMENTDEPOSIT
- GCL TIE AND TREATING INC.VILLAGE OF SIDNEY
- KERRY CHEMHANCOCK
- READBURN WOOD TAR SITEHANCOCK
- RICHARDSON HILL ROAD LANDFILL/PONDDELANCEY
- SIDNEY LANDFILLSIDNEY
- WADESON'S SURPLUSHANCOCK