EPA Air · stack tests by state, industry and year
Utilities (NAICS 2211): stack tests in Connecticut, 2026
- 20Stack 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 2026 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, 2026
- Utilities (NAICS 2213) 9
- Educational services (NAICS 6113) 6
- Pipeline transportation (NAICS 4862) 6
- Waste management and remediation (NAICS 5622) 5
- NAICS 9999 5
- Chemical manufacturing (NAICS 3254) 4
Air-emissions stack tests recorded in Connecticut, 2026
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2026-07-30 | HYTONE AG-GRID, LLC | COVENTRY, Tolland, CT | Pass | State |
| 2026-07-16 | GB II NEW HAVEN, LLC - NEW HAVEN HARBOR STATION | NEW HAVEN, New Haven, CT | Pending | State |
| 2026-07-15 | GB II NEW HAVEN, LLC - NEW HAVEN HARBOR STATION | NEW HAVEN, New Haven, CT | Pending | State |
| 2026-07-15 | GB II NEW HAVEN, LLC - NEW HAVEN HARBOR STATION | NEW HAVEN, New Haven, CT | Pending | State |
| 2026-07-01 | BRIDGEPORT ENERGY LLC | BRIDGEPORT, Fairfield, CT | Pass | State |
| 2026-06-30 | BRIDGEPORT ENERGY LLC | BRIDGEPORT, Fairfield, CT | Pass | State |
| 2026-06-25 | U S NAVAL SUBMARINE BASE — high-priority violation on file | GROTON (HISTORICAL), New London, CT | Pass | State |
| 2026-06-25 | U S NAVAL SUBMARINE BASE — high-priority violation on file | GROTON (HISTORICAL), New London, CT | Pass | State |
| 2026-06-24 | U S NAVAL SUBMARINE BASE — high-priority violation on file | GROTON (HISTORICAL), New London, CT | Pass | State |
| 2026-06-23 | U S NAVAL SUBMARINE BASE — high-priority violation on file | GROTON (HISTORICAL), New London, CT | Pass | State |
| 2026-06-15 | MONTVILLE POWER LLC | CONNECTICUT, Undetermined, CT | Pass | State |
| 2026-06-15 | MONTVILLE POWER LLC | CONNECTICUT, Undetermined, CT | Pass | State |
| 2026-06-03 | PLAINFIELD RENEWABLE ENERGY LLC | PLAINFIELD, Litchfield, CT | Pass | State |
| 2026-06-03 | PLAINFIELD RENEWABLE ENERGY LLC | PLAINFIELD, Litchfield, CT | Fail | State |
| 2026-05-01 | MIDDLETOWN POWER LLC | MIDDLETOWN, Middlesex, CT | Pending | State |
| 2026-04-29 | MIDDLETOWN POWER LLC | MIDDLETOWN, Middlesex, CT | Pass | State |
| 2026-04-27 | MIDDLETOWN POWER LLC | MIDDLETOWN, Middlesex, CT | Pass | State |
| 2026-04-21 | FORT HILL AG GRID, LLC | THOMPSON, Windham, CT | Pass | State |
| 2026-01-15 | MONTVILLE POWER LLC | CONNECTICUT, Undetermined, CT | Pass | State |
| 2026-01-15 | MONTVILLE POWER LLC | CONNECTICUT, Undetermined, 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.