EPA Air · stack tests by state and year
Air-emissions stack tests in Connecticut, 2025
- 178Stack 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 Connecticut 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 Connecticut, 2025
- New Haven County 63
- Hartford County 33
- New London County 24
- Middlesex County 18
- Fairfield County 13
- Litchfield County 10
- Windham County 9
- Tolland County 4
- Undetermined County 4
Connecticut, other years
Air-emissions stack tests recorded in Connecticut, 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-05-07 | CONNECTICUT JET POWER - TORRINGTON TERMINAL | TORRINGTON, Litchfield, CT | Pass | State |
| 2025-05-07 | CONNECTICUT JET POWER - TORRINGTON TERMINAL | TORRINGTON, Litchfield, CT | Pass | State |
| 2025-05-07 | MIDDLETOWN POWER LLC | MIDDLETOWN, Middlesex, CT | Pass | State |
| 2025-05-07 | DEVON POWER LLC | DEVON, New Haven, CT | Pass | State |
| 2025-05-06 | WHEELABRATOR BRIDGEPORT LP | BRIDGEPORT, Fairfield, CT | Pass | State |
| 2025-05-06 | MIDDLETOWN POWER LLC | MIDDLETOWN, Middlesex, CT | Pass | State |
| 2025-05-06 | DEVON POWER LLC | DEVON, New Haven, CT | Pass | State |
| 2025-05-06 | DEVON POWER LLC | DEVON, New Haven, CT | Pass | State |
| 2025-05-02 | DEVON POWER LLC | DEVON, New Haven, CT | Pass | State |
| 2025-05-02 | DEVON POWER LLC | DEVON, New Haven, CT | Pass | State |
| 2025-05-01 | DEVON POWER LLC | DEVON, New Haven, CT | Pass | State |
| 2025-05-01 | DEVON POWER LLC | DEVON, New Haven, CT | Pass | State |
| 2025-04-30 | YALE UNIVERSITY, SCHOOL OF MEDICINE PREMISES | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-04-24 | BRADLEY INTERNATIONAL AIRPORT / AMERESCO SELECT, INC. | WINDSOR LOCKS, Hartford, CT | Pass | State |
| 2025-04-23 | BRADLEY INTERNATIONAL AIRPORT / AMERESCO SELECT, INC. | WINDSOR LOCKS, Hartford, CT | Pass | State |
| 2025-04-23 | BRADLEY INTERNATIONAL AIRPORT / AMERESCO SELECT, INC. | WINDSOR LOCKS, Hartford, CT | Pass | State |
| 2025-04-16 | ALGONQUIN GAS TRANSMISSION, LLC - CROMWELL COMPRESSOR STATION | CROMWELL, Middlesex, CT | Pass | State |
| 2025-04-16 | ELECTRIC BOAT CORPORATION — high-priority violation on file | GROTON (HISTORICAL), New London, CT | Pass | State |
| 2025-04-15 | ELECTRIC BOAT CORPORATION — high-priority violation on file | GROTON (HISTORICAL), New London, CT | Pass | State |
| 2025-04-14 | ELECTRIC BOAT CORPORATION — high-priority violation on file | GROTON (HISTORICAL), New London, CT | Fail | State |
| 2025-04-11 | MIDDLETOWN POWER LLC | MIDDLETOWN, Middlesex, CT | Pass | State |
| 2025-04-11 | MIDDLETOWN POWER LLC | MIDDLETOWN, Middlesex, CT | Pass | State |
| 2025-04-11 | ELECTRIC BOAT CORPORATION — high-priority violation on file | GROTON (HISTORICAL), New London, CT | Pass | State |
| 2025-04-10 | ELECTRIC BOAT CORPORATION — high-priority violation on file | GROTON (HISTORICAL), New London, CT | Pass | State |
| 2025-04-10 | ELECTRIC BOAT CORPORATION — high-priority violation on file | GROTON (HISTORICAL), New London, CT | Pass | State |
| 2025-04-09 | MIDDLETOWN POWER LLC | MIDDLETOWN, Middlesex, CT | Pass | State |
| 2025-04-02 | LUVATA WATERBURY, INC. | WATERBURY, New Haven, CT | Pass | State |
| 2025-04-01 | MEC DBA EYELET CRAFTERS, INC | WATERBURY, New Haven, CT | Pass | State |
| 2025-03-27 | YALE UNIVERSITY / CENTRAL POWER PLANT | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-03-27 | YALE UNIVERSITY / CENTRAL POWER PLANT | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-03-26 | YALE UNIVERSITY / CENTRAL POWER PLANT | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-03-21 | GB II NEW HAVEN, LLC - NEW HAVEN HARBOR STATION | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-03-21 | GB II NEW HAVEN, LLC - NEW HAVEN HARBOR STATION | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-03-19 | YALE UNIVERSITY, SCHOOL OF MEDICINE PREMISES | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-03-19 | YALE UNIVERSITY, SCHOOL OF MEDICINE PREMISES | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-03-13 | HAMILTON SUNDSTRAND CORPORATION - COLLINS AEROSPACE | WINDSOR LOCKS, Hartford, CT | Pass | State |
| 2025-03-13 | YALE UNIVERSITY, SCHOOL OF MEDICINE PREMISES | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-03-13 | WALLINGFORD ENERGY, LLC | WALLINGFORD, New Haven, CT | Pass | State |
| 2025-03-12 | PRATT & WHITNEY, DIVISION OF RTX CORPORATION | EAST HARTFORD, Hartford, CT | Pass | State |
| 2025-03-12 | YALE UNIVERSITY, SCHOOL OF MEDICINE PREMISES | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-03-12 | YALE UNIVERSITY, SCHOOL OF MEDICINE PREMISES | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-03-11 | PRATT & WHITNEY, DIVISION OF RTX CORPORATION | EAST HARTFORD, Hartford, CT | Pass | State |
| 2025-03-11 | PRATT & WHITNEY, DIVISION OF RTX CORPORATION | EAST HARTFORD, Hartford, CT | Pass | State |
| 2025-03-06 | PRATT & WHITNEY, DIVISION OF RTX CORPORATION | MIDDLETOWN, Middlesex, CT | Pass | State |
| 2025-03-06 | PRATT & WHITNEY, DIVISION OF RTX CORPORATION | MIDDLETOWN, Middlesex, CT | Pass | State |
| 2025-03-05 | DUNN PAPER - EAST HARTFORD, LLC | EAST HARTFORD, Hartford, CT | Pass | State |
| 2025-03-05 | PRATT & WHITNEY, DIVISION OF RTX CORPORATION | MIDDLETOWN, Middlesex, CT | Pass | State |
| 2025-02-28 | HOTCHKISS SCHOOL | LAKEVILLE, Litchfield, CT | Pass | State |
| 2025-02-27 | STANLEY TOOLS | NEW BRITAIN, Hartford, CT | Pass | State |
| 2025-02-26 | STANLEY TOOLS | NEW BRITAIN, Hartford, CT | Pass | State |
| 2025-02-26 | BRADLEY INTERNATIONAL AIRPORT / AMERESCO SELECT, INC. | WINDSOR LOCKS, Hartford, CT | Pass | State |
| 2025-02-26 | HOTCHKISS SCHOOL | LAKEVILLE, Litchfield, CT | Pass | State |
| 2025-02-25 | STANLEY TOOLS | NEW BRITAIN, Hartford, CT | Pass | State |
| 2025-02-19 | NAUGATUCK WPCA/POTW | NAUGATUCK (HISTORICAL), New Haven, CT | Pass | State |
| 2025-02-13 | YALE UNIVERSITY, SCHOOL OF MEDICINE PREMISES | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-02-13 | YALE UNIVERSITY, SCHOOL OF MEDICINE PREMISES | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-02-13 | THE GILMAN BROTHERS COMPANY | GILMAN, New London, CT | Fail | State |
| 2025-02-11 | YALE UNIVERSITY, SCHOOL OF MEDICINE PREMISES | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-02-11 | YALE UNIVERSITY, SCHOOL OF MEDICINE PREMISES | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-02-04 | PEPPERIDGE FARM, INC | BLOOMFIELD, Hartford, CT | Pass | State |
| 2025-02-04 | ALGONQUIN GAS TRANSMISSION LLC - OXFORD COMPRESSOR STATION | OXFORD, New Haven, CT | Pass | State |
| 2025-02-04 | ALGONQUIN GAS TRANSMISSION LLC - OXFORD COMPRESSOR STATION | OXFORD, New Haven, CT | Pass | State |
| 2025-01-30 | PRATT & WHITNEY, DIVISION OF RTX CORPORATION | MIDDLETOWN, Middlesex, CT | Pass | State |
| 2025-01-30 | MONTVILLE POWER LLC | CONNECTICUT, Undetermined, CT | Pass | State |
| 2025-01-30 | MONTVILLE POWER LLC | CONNECTICUT, Undetermined, CT | Pass | State |
| 2025-01-23 | GB II CONNECTICUT, LLC - BRIDGEPORT HARBOR STATION | BRIDGEPORT, Fairfield, CT | Pass | State |
| 2025-01-23 | GB II CONNECTICUT, LLC - BRIDGEPORT HARBOR STATION | BRIDGEPORT, Fairfield, CT | Pass | State |
| 2025-01-23 | ROEHM AMERICA, LLC — high-priority violation on file | WALLINGFORD, New Haven, CT | Fail | State |
| 2025-01-22 | PALM ENERGY LLC | BRISTOL, Hartford, CT | Fail | State |
| 2025-01-22 | FORT HILL AG GRID, LLC | THOMPSON, Windham, CT | Pass | State |
| 2025-01-16 | IROQUOIS - MILFORD COMPRESSOR STATION | MILFORD, New Haven, CT | Pass | State |
| 2025-01-16 | IROQUOIS - MILFORD COMPRESSOR STATION | MILFORD, New Haven, CT | Pass | State |
| 2025-01-15 | YALE UNIVERSITY / CENTRAL POWER PLANT | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-01-15 | YALE UNIVERSITY / CENTRAL POWER PLANT | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-01-15 | YALE UNIVERSITY / CENTRAL POWER PLANT | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-01-07 | BOEHRINGER INGELHEIM PHARMACEUTICALS INC | RIDGEFIELD, Fairfield, CT | Pass | State |
| 2025-01-07 | BOEHRINGER INGELHEIM PHARMACEUTICALS INC | RIDGEFIELD, Fairfield, CT | Pass | State |
| 2025-01-06 | YALE UNIVERSITY WEST CAMPUS | WEST HAVEN, New Haven, CT | Pass | State |
PreviousPage 1Page 2 of 2
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.