EPA Air · stack tests by state, industry and year
Utilities (NAICS 2211): stack tests in Connecticut, 2025
- 57Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row is one stack test recorded during 2025 at a Connecticut source whose primary industry code is NAICS 2211. A facility filing more than one industry code is counted under the first one on its record.
Utilities (NAICS 2211) in Connecticut, other years
Other industries in Connecticut, 2025
- Educational services (NAICS 6113) 21
- Transportation equipment manufacturing (NAICS 3364) 12
- Pipeline transportation (NAICS 4862) 10
- Waste management and remediation (NAICS 5622) 8
- Utilities (NAICS 2213) 8
- Transportation equipment manufacturing (NAICS 3366) 6
- Support activities for transportation (NAICS 4881) 4
- Nonmetallic mineral product manufacturing (NAICS 3279) 4
- Paper manufacturing (NAICS 3221) 4
- Chemical manufacturing (NAICS 3254) 4
- Plastics and rubber products manufacturing (NAICS 3261) 3
- Fabricated metal product manufacturing (NAICS 3322) 3
- Paper manufacturing (NAICS 3222) 3
- Merchant wholesalers, nondurable goods (NAICS 4247) 3
Air-emissions stack tests recorded in Connecticut, 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-10-30 | GB II NEW HAVEN, LLC - NEW HAVEN HARBOR STATION | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-10-29 | GB II NEW HAVEN, LLC - NEW HAVEN HARBOR STATION | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-10-29 | GB II NEW HAVEN, LLC - NEW HAVEN HARBOR STATION | NEW HAVEN, New Haven, CT | Pass | State |
| 2025-09-17 | CONNECTICUT MUNICIPAL ELECTRIC ENERGY COOPERATIVE - BRIDGE STREET SITE — high-priority violation on file | GROTON, New London, CT | Pass | State |
| 2025-09-16 | CONNECTICUT MUNICIPAL ELECTRIC ENERGY COOPERATIVE - WATER TREATMENT PLANT — high-priority violation on file | GROTON, New London, CT | Pass | State |
| 2025-09-11 | CONNECTICUT MUNICIPAL ELECTRIC ENERGY COOPERATIVE - JEWETT CITY SITE — high-priority violation on file | GRISWOLD, New London, CT | Pass | State |
| 2025-08-21 | DEVON POWER LLC | DEVON, New Haven, CT | Pass | State |
| 2025-08-20 | DEVON POWER LLC | DEVON, New Haven, CT | Pass | State |
| 2025-08-19 | DEVON POWER LLC | DEVON, New Haven, CT | Pass | State |
| 2025-08-19 | CONNECTICUT MUNICIPAL ELECTRIC ENERGY COOPERATIVE | NORWICH, New London, CT | Pass | State |
| 2025-08-19 | CONNECTICUT MUNICIPAL ELECTRIC ENERGY COOPERATIVE | NORWICH, New London, CT | Pass | State |
| 2025-08-15 | DEVON POWER LLC | DEVON, New Haven, CT | Pass | State |
| 2025-07-29 | CONNECTICUT MUNICIPAL ELECTRIC ENERGY COOPERATIVE - GARY COURT SUBSTATION | GROTON, New London, CT | Pass | State |
| 2025-07-29 | CONNECTICUT MUNICIPAL ELECTRIC ENERGY COOPERATIVE - GARY COURT SUBSTATION | GROTON, New London, CT | Pass | State |
| 2025-07-22 | HYTONE AG-GRID, LLC | COVENTRY, Tolland, CT | Pass | State |
| 2025-07-17 | CONNECTICUT MUNICIPAL ELECTRIC ENERGY COOPERATIVE - BRIDGE STREET SITE — high-priority violation on file | GROTON, New London, CT | Pass | State |
| 2025-07-15 | CONNECTICUT MUNICIPAL ELECTRIC ENERGY COOPERATIVE - WATER TREATMENT PLANT — high-priority violation on file | GROTON, New London, CT | Pass | State |
| 2025-06-19 | PLAINFIELD RENEWABLE ENERGY LLC | PLAINFIELD, Litchfield, CT | Pass | State |
| 2025-06-12 | U S NAVAL SUBMARINE BASE — high-priority violation on file | GROTON (HISTORICAL), New London, CT | Pass | State |
| 2025-06-11 | U S NAVAL SUBMARINE BASE — high-priority violation on file | GROTON (HISTORICAL), New London, CT | Pass | State |
| 2025-05-23 | CONNECTICUT MUNICIPAL ELECTRIC ENERGY COOPERATIVE - LEBANON PINES SITE | LEBANON, New London, CT | Pass | State |
| 2025-05-23 | CONNECTICUT MUNICIPAL ELECTRIC ENERGY COOPERATIVE - LEBANON PINES SITE | LEBANON, New London, CT | Pass | State |
| 2025-05-14 | PALM ENERGY LLC | BRISTOL, Hartford, CT | Pass | State |
| 2025-05-13 | DEVON POWER LLC | DEVON, New Haven, CT | Pass | State |
| 2025-05-12 | MIDDLETOWN POWER LLC | MIDDLETOWN, Middlesex, CT | Pass | State |
| 2025-05-09 | MIDDLETOWN POWER LLC | MIDDLETOWN, Middlesex, CT | Pass | State |
| 2025-05-09 | DEVON POWER LLC | DEVON, New Haven, CT | Pass | State |
| 2025-05-09 | CONNECTICUT JET POWER - BRANFORD STATION | BRANFORD, New Haven, CT | Pass | State |
| 2025-05-09 | CONNECTICUT JET POWER - BRANFORD STATION | BRANFORD, New Haven, CT | Pass | State |
| 2025-05-08 | CONNECTICUT JET POWER - COS COB STATION | GREENWICH, Fairfield, CT | Pass | State |
| 2025-05-08 | CONNECTICUT JET POWER - COS COB STATION | GREENWICH, Fairfield, CT | Pass | State |
| 2025-05-08 | DEVON POWER LLC | DEVON, New Haven, CT | Pass | State |
| 2025-05-07 | CONNECTICUT JET POWER - FRANKLIN DRIVE STATION | TORRINGTON, Litchfield, CT | Pass | State |
| 2025-05-07 | CONNECTICUT JET POWER - FRANKLIN DRIVE STATION | TORRINGTON, Litchfield, CT | Pass | State |
| 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 | 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 |
| 2025-04-11 | MIDDLETOWN POWER LLC | MIDDLETOWN, Middlesex, CT | Pass | State |
| 2025-04-11 | MIDDLETOWN POWER LLC | MIDDLETOWN, Middlesex, CT | Pass | State |
| 2025-04-09 | MIDDLETOWN POWER LLC | MIDDLETOWN, Middlesex, 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 |
| 2025-03-13 | WALLINGFORD ENERGY, LLC | WALLINGFORD, New Haven, 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 |
| 2025-01-22 | PALM ENERGY LLC | BRISTOL, Hartford, CT | Fail | State |
| 2025-01-22 | FORT HILL AG GRID, LLC | THOMPSON, Windham, CT | Pass | State |
Primary NAICS code as filed on the facility record; dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.