EPA Air · stack tests by state, industry and year
Hospitals (NAICS 6221): stack tests in Maryland, 2025
- 4Stack 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 Maryland source whose primary industry code is NAICS 6221. A facility filing more than one industry code is counted under the first one on its record.
Hospitals (NAICS 6221) in Maryland, other years
Other industries in Maryland, 2025
- Utilities (NAICS 2211) 12
- Waste management and remediation (NAICS 5622) 11
- Pipeline transportation (NAICS 4862) 7
- Nonmetallic mineral product manufacturing (NAICS 3273) 4
- Food manufacturing (NAICS 3118) 3
Air-emissions stack tests recorded in Maryland, 2025
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2025-12-02 | UNIVERSITY OF MARYLAND MEDICAL CENTER | BALTIMORE, Baltimore (city), MD | Pass | State |
| 2025-05-29 | UPPER CHESAPEAKE MEDICAL CENTER | BEL AIR, Harford, MD | Pass | State |
| 2025-05-08 | UNION HOSPITAL | ELKTON, Cecil, MD | Pass | State |
| 2025-03-12 | ADVENTIST HEALTH CARE WHITE OAK MEDICAL CENTER | SILVER SPRING, Montgomery, 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.