EPA Air · stack tests by county and year
Air-emissions stack tests in Grafton County, New Hampshire, 2025
- 4Stack 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 Grafton County, New Hampshire 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 Grafton County facility page.
Grafton County, New Hampshire, 2025
Air-emissions stack tests in Grafton County, other years
Air-emissions stack tests recorded in Grafton County, New Hampshire, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-08-14 | BRIDGEWATER POWER COMPANY, L.P. | Pass | State |
| 2025-08-14 | BRIDGEWATER POWER COMPANY, L.P. | Pass | State |
| 2025-04-16 | BRITTON LUMBER COMPANY, LLC | Pass | State |
| 2025-02-25 | DARTMOUTH COLLEGE | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.