EPA Air · stack tests by county and year
Air-emissions stack tests in Rockingham County, New Hampshire, 2025
- 14Stack 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 Rockingham 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 Rockingham County facility page.
Rockingham County, New Hampshire, 2025
Air-emissions stack tests in Rockingham County, other years
What stands out
- Stack tests in Rockingham County, New Hampshire, rose from 11 in 2024, the previous year on file, to 14 in 2025.
- The county’s file for stack tests holds 10 years of events, from 2017 through 2026.
- Its 14 stack tests rank 1st of the 7 county cells in New Hampshire for 2025.
- Its 14 stack tests are 23.7% of the 59 the state’s file holds for 2025.
Every line is computed by formula from the state’s stored file; nothing is estimated.
Air-emissions stack tests recorded in Rockingham County, New Hampshire, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-09-17 | AJ NONWOVENS-HAMPTON, LLC | Pass | State |
| 2025-08-12 | NEWINGTON ENERGY | Pass | State |
| 2025-08-12 | NEWINGTON ENERGY | Pass | State |
| 2025-06-26 | SCHILLER STATION COMBUSTION TURBINE | Pass | State |
| 2025-06-18 | GRANITE RIDGE ENERGY, LLC | Pass | State |
| 2025-06-17 | GRANITE RIDGE ENERGY, LLC | Pass | State |
| 2025-05-13 | GEORGIA-PACIFIC GYPSUM LLC | Pass | State |
| 2025-05-13 | GEORGIA-PACIFIC GYPSUM LLC | Pass | State |
| 2025-05-13 | GEORGIA-PACIFIC GYPSUM LLC | Pass | State |
| 2025-05-07 | LINDT & SPRUNGLI (USA) INC. | Pass | State |
| 2025-04-02 | NEXTERA ENERGY SEABROOK, LLC | Pass | State |
| 2025-04-02 | NEXTERA ENERGY SEABROOK, LLC | Pass | State |
| 2025-03-06 | GSP NEWINGTON LLC | Pass | State |
| 2025-03-06 | GSP NEWINGTON LLC | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.
What this page shows
This page covers stack tests for Clean Air Act facilities in the EPA air register in Rockingham county, NH, for 2025. It lists 14 stack tests recorded in 2025.