EPA Air · stack tests by state and year
Air-emissions stack tests in New Hampshire, 2025
- 59Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Every stack test below was recorded against a source in New Hampshire during 2025; one facility can appear more than once, because this is a record of what happened rather than a list of places.
Counties in New Hampshire, 2025
- Rockingham County 14
- Merrimack County 13
- Hillsborough County 9
- Coos County 8
- Carroll County 5
- Grafton County 4
- Sullivan County 3
New Hampshire, other years
Air-emissions stack tests recorded in New Hampshire, 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-12-10 | DURGIN AND CROWELL LUMBER COMPANY, INC. | SPRINGFIELD, Sullivan, NH | Pass | State |
| 2025-11-20 | WATTS REGULATOR CO. | FRANKLIN, Merrimack, NH | Pass | State |
| 2025-11-04 | GORHAM ACQUISITION, LLC — high-priority violation on file | GORHAM, Coos, NH | Pass | State |
| 2025-10-07 | WORTHEN INDUSTRIES | NASHUA, Hillsborough, NH | Pass | State |
| 2025-09-25 | NE RENEWABLE POWER SPRINGFIELD | SPRINGFIELD, Sullivan, NH | Pass | State |
| 2025-09-25 | NE RENEWABLE POWER SPRINGFIELD | SPRINGFIELD, Sullivan, NH | Pass | State |
| 2025-09-17 | AJ NONWOVENS-HAMPTON, LLC | HAMPTON, Rockingham, NH | Pass | State |
| 2025-08-29 | GOFFSTOWN TRANSFER STATION | GOFFSTOWN, Hillsborough, NH | Pass | State |
| 2025-08-19 | NE RENEWABLE POWER TAMWORTH — high-priority violation on file | TAMWORTH, Carroll, NH | Pass | State |
| 2025-08-19 | NE RENEWABLE POWER TAMWORTH — high-priority violation on file | TAMWORTH, Carroll, NH | Pass | State |
| 2025-08-14 | BRIDGEWATER POWER COMPANY, L.P. | BRIDGEWATER, Grafton, NH | Pass | State |
| 2025-08-14 | BRIDGEWATER POWER COMPANY, L.P. | BRIDGEWATER, Grafton, NH | Pass | State |
| 2025-08-13 | NASHUA, CITY OF - WASTEWATER TREATMENT FACILITY | NASHUA, Hillsborough, NH | Pass | State |
| 2025-08-12 | NASHUA, CITY OF - WASTEWATER TREATMENT FACILITY | NASHUA, Hillsborough, NH | Pass | State |
| 2025-08-12 | NEWINGTON ENERGY | NEWINGTON, Rockingham, NH | Pass | State |
| 2025-08-12 | NEWINGTON ENERGY | NEWINGTON, Rockingham, NH | Pass | State |
| 2025-07-31 | MERRIMACK STATION | BOW, Merrimack, NH | Pass | State |
| 2025-07-31 | MERRIMACK STATION | BOW, Merrimack, NH | Pass | State |
| 2025-07-31 | MERRIMACK STATION | BOW, Merrimack, NH | Fail | State |
| 2025-07-22 | CRANE SECURITY TECHNOLOGIES, INC. — high-priority violation on file | NASHUA, Hillsborough, NH | Pass | State |
| 2025-07-16 | NEVILLE MATERIALS LLC | NEW BOSTON, Hillsborough, NH | Pass | State |
| 2025-07-11 | BURGESS BIOPOWER | BERLIN, Coos, NH | Pass | State |
| 2025-07-09 | BURGESS BIOPOWER | BERLIN, Coos, NH | Pass | State |
| 2025-07-09 | HITCHINER MANUFACTURING CO., INC. | MILFORD, Hillsborough, NH | Pass | State |
| 2025-06-26 | WHEELABRATOR CONCORD COMPANY, L.P. | CONCORD, Merrimack, NH | Pass | State |
| 2025-06-26 | SCHILLER STATION COMBUSTION TURBINE | PORTSMOUTH, Rockingham, NH | Pass | State |
| 2025-06-25 | WHEELABRATOR CONCORD COMPANY, L.P. | CONCORD, Merrimack, NH | Pass | State |
| 2025-06-18 | GRANITE RIDGE ENERGY, LLC | LONDONDERRY, Rockingham, NH | Pass | State |
| 2025-06-17 | GRANITE RIDGE ENERGY, LLC | LONDONDERRY, Rockingham, NH | Pass | State |
| 2025-06-03 | CONTINENTAL PAVING INC | CONCORD, Merrimack, NH | Pass | State |
| 2025-05-29 | LOST NATION GENERATING STATION | NORTHUMBERLAND, Coos, NH | Pass | State |
| 2025-05-29 | WHEELABRATOR CONCORD COMPANY, L.P. | CONCORD, Merrimack, NH | Pass | State |
| 2025-05-28 | WHITE LAKE STATION | TAMWORTH, Carroll, NH | Pass | State |
| 2025-05-28 | WHEELABRATOR CONCORD COMPANY, L.P. | CONCORD, Merrimack, NH | Pass | State |
| 2025-05-13 | GEORGIA-PACIFIC GYPSUM LLC | NEWINGTON, Rockingham, NH | Pass | State |
| 2025-05-13 | GEORGIA-PACIFIC GYPSUM LLC | NEWINGTON, Rockingham, NH | Pass | State |
| 2025-05-13 | GEORGIA-PACIFIC GYPSUM LLC | NEWINGTON, Rockingham, NH | Pass | State |
| 2025-05-08 | UNIVERSITY OF NEW HAMPSHIRE | DURHAM, Strafford, NH | Pass | State |
| 2025-05-07 | LINDT & SPRUNGLI (USA) INC. | STRATHAM, Rockingham, NH | Pass | State |
| 2025-05-06 | NORTH COUNTRY GROWERS, LLC | BERLIN, Coos, NH | Pass | State |
| 2025-04-29 | ANDROSCOGGIN VALLEY HOSPITAL, INC. | BERLIN, Coos, NH | Pass | State |
| 2025-04-29 | CUMMINGS PRINTING COMPANY | HOOKSETT, Merrimack, NH | Pass | State |
| 2025-04-16 | BRITTON LUMBER COMPANY, LLC | BATH, Grafton, NH | Pass | State |
| 2025-04-08 | COLD RIVER MATERIALS - WALPOLE (S&G) | WALPOLE, Cheshire, NH | Pass | State |
| 2025-04-04 | MERRIMACK STATION | BOW, Merrimack, NH | Pass | State |
| 2025-04-04 | MERRIMACK STATION | BOW, Merrimack, NH | Pass | State |
| 2025-04-02 | NEXTERA ENERGY SEABROOK, LLC | SEABROOK, Rockingham, NH | Pass | State |
| 2025-04-02 | NEXTERA ENERGY SEABROOK, LLC | SEABROOK, Rockingham, NH | Pass | State |
| 2025-03-27 | NE RENEWABLE POWER WHITEFIELD | WHITEFIELD, Coos, NH | Pass | State |
| 2025-03-27 | NE RENEWABLE POWER WHITEFIELD | WHITEFIELD, Coos, NH | Pass | State |
| 2025-03-26 | EPIC MEDTEC OEM LLC | JAFFREY, Cheshire, NH | Pass | State |
| 2025-03-25 | WARWICK MILLS, INC. | NEW IPSWICH, Hillsborough, NH | Pass | State |
| 2025-03-21 | NE RENEWABLE POWER TAMWORTH — high-priority violation on file | TAMWORTH, Carroll, NH | Pass | State |
| 2025-03-21 | NE RENEWABLE POWER TAMWORTH — high-priority violation on file | TAMWORTH, Carroll, NH | Pass | State |
| 2025-03-06 | GSP NEWINGTON LLC | NEWINGTON, Rockingham, NH | Pass | State |
| 2025-03-06 | GSP NEWINGTON LLC | NEWINGTON, Rockingham, NH | Pass | State |
| 2025-02-25 | DARTMOUTH COLLEGE | HANOVER, Grafton, NH | Pass | State |
| 2025-02-11 | HITCHINER MANUFACTURING CO., INC. | MILFORD, Hillsborough, NH | Pass | State |
| 2025-01-10 | MERRIMACK STATION | BOW, Merrimack, NH | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.