Windham County, CT
The federal environmental record for Windham County: what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
4
Superfund NPL sites
8
federal cleanup sites
3
PFAS-detecting water systems
14
TRI facilities
35
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| Gallup's Quarry | Plainfield | on the NPL | 10/04/1989 |
| Linemaster Switch Corp. | Woodstock | on the NPL | 02/21/1990 |
| Revere Textile Prints Corp. | Sterling | deleted | 07/22/1987 |
| Yaworski Waste Lagoon | Canterbury | on the NPL | 09/08/1983 |
Drinking water: PFAS testing
Public water systems serving Windham 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 |
|---|---|---|
| CTWC - CRYSTAL SYSTEM CT0690011 | PFOA: 9.9 ng/L PFOS: 6.8 ng/L PFHxS: 4 ng/L | above final limit |
| PUTNAM WATER POLLUTION CONTROL AUTHORITY CT1160011 | PFOA: 8.5 ng/L PFOS: 7.5 ng/L PFHxS: 4 ng/L | above final limit |
| WINDHAM WATER WORKS CT1630011 | PFHxA: 3.4 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
14 facilities in Windham filed TRI reports for 2024, totalling 49k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| PRYSMIAN CABLE & SYSTEMS LLC | WILLIMANTIC | Ozone, Antimony compounds | 31k lb |
| BROOKWOOD LAMINATING INC | WAUREGAN | N,N-Dimethylformamide, Toluene | 8k lb |
| UNITED ABRASIVES INC | NORTH WINDHAM | Phenol | 4k lb |
| DIMENSION-POLYANT INC. | PUTNAM | Toluene | 3k lb |
| ROGERS CORP - WOODSTOCK | WOODSTOCK | N-Methyl-2-pyrrolidone, Propylene | 2k lb |
| FRITO-LAY INC | DAYVILLE | Ammonia | 638 lb |
| WINCHESTER INTERCONNECT CM CORP | DAYVILLE | Antimony, Di(2-ethylhexyl) phthalate | 331 lb |
| PALL CORP | PUTNAM | Certain glycol ethers, N-Methyl-2-pyrrolidone | 141 lb |
| NATIONAL CHROMIUM CO INC | PUTNAM | Lead And Lead Compounds | 31 lb |
| BST SYSTEMS INC | PLAINFIELD | Lead And Lead Compounds | 21 lb |
| WHITCRAFT LLC (EASTFORD) | EASTFORD | Chromium, Nickel | 4 lb |
| QUIKRETE - CONNECTICUT PLANT | MOOSUP | Lead | 1 lb |
| NUTMEG CONTAINER CORP | PUTNAM | - | 0 lb |
| MORGAN TRUCK BODY LLC - MCT | MOOSUP | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 374 tank facilities in Windham: 172 tanks in service and 1,057 closed. 74 fuel releases are on record, of which 35 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Windham 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 Windham, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- AMERICAN THREAD COMPANY (FORMER)WINDHAM (WILIMANTIC)
- BALLOUVILLE MILLDANIELSON
- C. E. M. COMPANY, INC.KILLINGLY
- DOT GARAGEBROOKLYN
- GALLUP'S QUARRYPLAINFIELD
- LINEMASTER SWITCH CORP-TREATMENT PLANTWOODSTOCK
- REVERE TEXTILE PRINTS SITESTERLING
- WINDHAM MUNICIPAL DUMPWINDHAM