EPA Air · stack tests by county and year
Air-emissions stack tests in Merrimack County, New Hampshire, 2025
- 13Stack 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 Merrimack 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 Merrimack County facility page.
Merrimack County, New Hampshire, 2025
Air-emissions stack tests in Merrimack County, other years
Air-emissions stack tests recorded in Merrimack County, New Hampshire, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-11-20 | WATTS REGULATOR CO. | Pass | State |
| 2025-07-31 | MERRIMACK STATION | Pass | State |
| 2025-07-31 | MERRIMACK STATION | Pass | State |
| 2025-07-31 | MERRIMACK STATION | Fail | State |
| 2025-06-26 | WHEELABRATOR CONCORD COMPANY, L.P. | Pass | State |
| 2025-06-25 | WHEELABRATOR CONCORD COMPANY, L.P. | Pass | State |
| 2025-06-03 | CONTINENTAL PAVING INC | Pass | State |
| 2025-05-29 | WHEELABRATOR CONCORD COMPANY, L.P. | Pass | State |
| 2025-05-28 | WHEELABRATOR CONCORD COMPANY, L.P. | Pass | State |
| 2025-04-29 | CUMMINGS PRINTING COMPANY | Pass | State |
| 2025-04-04 | MERRIMACK STATION | Pass | State |
| 2025-04-04 | MERRIMACK STATION | Pass | State |
| 2025-01-10 | MERRIMACK STATION | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.