EPA Air · stack tests by state, industry and year
Chemical manufacturing (NAICS 3251): stack tests in Maryland, 2024
- 3Stack 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 2024 at a Maryland source whose primary industry code is NAICS 3251. A facility filing more than one industry code is counted under the first one on its record.
Chemical manufacturing (NAICS 3251) in Maryland, other years
- 2021 3
Other industries in Maryland, 2024
- Utilities (NAICS 2211) 13
- Waste management and remediation (NAICS 5622) 8
- Pipeline transportation (NAICS 4862) 7
- Nonmetallic mineral product manufacturing (NAICS 3273) 6
- Hospitals (NAICS 6221) 4
Air-emissions stack tests recorded in Maryland, 2024
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2024-08-16 | W. R. GRACE & CO. - CONN. | CURTIS BAY, Baltimore (city), MD | Pass | State |
| 2024-07-11 | W. R. GRACE & CO. - CONN. | CURTIS BAY, Baltimore (city), MD | Pass | State |
| 2024-04-19 | W. R. GRACE & CO. - CONN. | CURTIS BAY, Baltimore (city), MD | 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.