EPA Air · stack tests by state, industry and year
Utilities (NAICS 2211): stack tests in Massachusetts, 2025
- 18Stack 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 Massachusetts 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 Massachusetts, other years
Other industries in Massachusetts, 2025
- Utilities (NAICS 2213) 5
- Printing and related support (NAICS 3231) 5
- Waste management and remediation (NAICS 5622) 5
Air-emissions stack tests recorded in Massachusetts, 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-10-28 | CONSTELLATION WEST MEDWAY LLC | MEDWAY, Norfolk, MA | Pending | State |
| 2025-10-16 | BLACKSTONE POWER GENERATING LLC | BLACKSTONE, Worcester, MA | Pending | State |
| 2025-10-01 | CONSTELLATION WEST MEDWAY LLC | MEDWAY, Norfolk, MA | Pass | State |
| 2025-09-11 | PITTSFIELD GENERATING COMPANY LP — high-priority violation on file | PITTSFIELD, TOWN OF, Berkshire, MA | Pass | State |
| 2025-09-10 | MEDICAL AREA TOTAL ENERGY | BOSTON, CITY OF, Suffolk, MA | Pass | State |
| 2025-08-19 | SHREWSBURY ELECTRIC AND CABLE OPERATIONS | SHREWSBURY, TOWN OF, Worcester, MA | Pass | State |
| 2025-07-24 | CONSTELLATION WEST MEDWAY LLC | MEDWAY, Norfolk, MA | Pass | State |
| 2025-07-23 | BARWAY FARM ORGANICS RECYCLERY | DEERFIELD, Franklin, MA | Pass | State |
| 2025-07-11 | PEABODY MUNICIPAL LIGHT PLANT | PEABODY, CITY OF, Essex, MA | Pass | State |
| 2025-05-23 | SEMASS PARTNERSHIP | ROCHESTER, Plymouth, MA | Pass | State |
| 2025-04-17 | MEDICAL AREA TOTAL ENERGY | BOSTON, CITY OF, Suffolk, MA | Pass | State |
| 2025-03-24 | STONY BROOK ENERGY CENTER — high-priority violation on file | LUDLOW, TOWN OF, Hampden, MA | Pass | State |
| 2025-02-25 | CHICOPEE ELECTRIC LIGHT — high-priority violation on file | CHICOPEE, TOWN OF, Hampden, MA | Pass | State |
| 2025-02-12 | CONSTELLATION WEST MEDWAY LLC | MEDWAY, Norfolk, MA | Pass | State |
| 2025-02-11 | MASS MUNICIPAL WHOLESALE ELECTRIC CO | PEABODY, Essex, MA | Pass | State |
| 2025-01-21 | CONSTELLATION WEST MEDWAY LLC | MEDWAY, Norfolk, MA | Pass | State |
| 2025-01-09 | SEMASS PARTNERSHIP | ROCHESTER, Plymouth, MA | Pass | State |
| 2025-01-02 | HARVARD UNIVERSITY | CAMBRIDGE, TOWN OF, Middlesex, MA | 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.