EPA Air · stack tests by county and year
Air-emissions stack tests in Windham County, Connecticut, 2025
- 9Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row below is one stack test recorded against a source in Windham County, Connecticut during 2025. A facility can appear several times: this is the year’s record of what happened, not a list of places. The sources themselves are on the Windham County facility page.
Windham County, Connecticut, 2025
Air-emissions stack tests in Windham County, other years
Air-emissions stack tests recorded in Windham County, Connecticut, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-11-18 | SONOCO PROTECTIVE SOLUTIONS | Pass | State |
| 2025-10-15 | ALGONQUIN GAS TRANSMISSION, LLC - CHAPLIN COMPRESSOR STATION | Pass | State |
| 2025-09-11 | UNITED ABRASIVES, INC — high-priority violation on file | Fail | State |
| 2025-09-10 | UNITED ABRASIVES, INC — high-priority violation on file | Fail | State |
| 2025-09-09 | UNITED ABRASIVES, INC — high-priority violation on file | Fail | State |
| 2025-09-09 | UNITED ABRASIVES, INC — high-priority violation on file | Fail | State |
| 2025-09-03 | ALGONQUIN GAS TRANSMISSION, LLC - CHAPLIN COMPRESSOR STATION | Pass | State |
| 2025-08-08 | TILCON CONNECTICUT INC. - PLAINFIELD (WAUREGAN) | Pass | State |
| 2025-01-22 | FORT HILL AG GRID, LLC | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.