EPA Air · stack tests by state, industry and year
Chemical manufacturing (NAICS 3254): stack tests in Pennsylvania, 2025
- 6Stack 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 Pennsylvania source whose primary industry code is NAICS 3254. A facility filing more than one industry code is counted under the first one on its record.
Chemical manufacturing (NAICS 3254) in Pennsylvania, other years
Other industries in Pennsylvania, 2025
- Oil and gas extraction (NAICS 2111) 455
- Pipeline transportation (NAICS 4862) 88
- Utilities (NAICS 2211) 60
- Mining support (NAICS 2131) 41
- Waste management and remediation (NAICS 5622) 30
- Petroleum and coal products manufacturing (NAICS 3241) 19
- Nonmetallic mineral product manufacturing (NAICS 3273) 18
- Primary metal manufacturing (NAICS 3311) 16
- Primary metal manufacturing (NAICS 3312) 15
- Merchant wholesalers, nondurable goods (NAICS 4247) 15
- Utilities (NAICS 2213) 12
- Chemical manufacturing (NAICS 3251) 11
- Plastics and rubber products manufacturing (NAICS 3261) 11
- Electrical equipment and appliance manufacturing (NAICS 3359) 11
- Educational services (NAICS 6113) 9
- Paper manufacturing (NAICS 3221) 9
- Chemical manufacturing (NAICS 3252) 8
- Utilities (NAICS 2212) 6
- Primary metal manufacturing (NAICS 3314) 6
- Printing and related support (NAICS 3231) 6
- Nonmetallic mineral product manufacturing (NAICS 3272) 5
- Mining and quarrying (NAICS 2123) 5
- Hospitals (NAICS 6221) 5
- Food manufacturing (NAICS 3118) 4
- Nonmetallic mineral product manufacturing (NAICS 3271) 4
- Primary metal manufacturing (NAICS 3313) 4
- Merchant wholesalers, durable goods (NAICS 4233) 4
- Fabricated metal product manufacturing (NAICS 3324) 4
- Primary metal manufacturing (NAICS 3315) 4
- Mining and quarrying (NAICS 2121) 4
- Machinery manufacturing (NAICS 3339) 3
- Fabricated metal product manufacturing (NAICS 3321) 3
- Administration of environmental programs (NAICS 9241) 3
- National security and international affairs (NAICS 9281) 3
- Food manufacturing (NAICS 3112) 3
- Chemical manufacturing (NAICS 3259) 3
Air-emissions stack tests recorded in Pennsylvania, 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-10-28 | MERCK SHARP & DOHME LLC/WEST PT | WEST POINT, Montgomery, PA | Pass | State |
| 2025-10-09 | GLAXO SMITHKLINE/UPPER PROVIDENCE — high-priority violation on file | COLLEGEVILLE, Montgomery, PA | Pass | State |
| 2025-06-12 | MERCK SHARP & DOHME LLC/WEST PT | WEST POINT, Montgomery, PA | Pass | State |
| 2025-04-03 | MERCK SHARP & DOHME LLC/WEST PT | WEST POINT, Montgomery, PA | Pass | State |
| 2025-02-27 | FRONTIDA BIOPHARM INC (FORMERLY MUTUAL PHARMACEUTICAL INC) | PHILADELPHIA, Philadelphia, PA | Pass | Local |
| 2025-02-19 | FRONTIDA BIOPHARM INC (FORMERLY MUTUAL PHARMACEUTICAL INC) | PHILADELPHIA, Philadelphia, PA | Pass | Local |
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.