EPA Air · stack tests by state, industry and year
Utilities (NAICS 2212): stack tests in Illinois, 2026
- 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 2026 at a Illinois source whose primary industry code is NAICS 2212. A facility filing more than one industry code is counted under the first one on its record.
Utilities (NAICS 2212) in Illinois, other years
Other industries in Illinois, 2026
- Utilities (NAICS 2211) 37
- Mining and quarrying (NAICS 2121) 29
- Mining and quarrying (NAICS 2123) 25
- Food manufacturing (NAICS 3112) 14
- Petroleum and coal products manufacturing (NAICS 3241) 11
- Electrical equipment and appliance manufacturing (NAICS 3359) 10
- Pipeline transportation (NAICS 4862) 8
- Primary metal manufacturing (NAICS 3315) 5
- Waste management and remediation (NAICS 5622) 5
- Nonmetallic mineral product manufacturing (NAICS 3273) 5
- Oil and gas extraction (NAICS 2111) 4
- Hospitals (NAICS 6221) 4
Air-emissions stack tests recorded in Illinois, 2026
| Date | Facility | Where | Kind | Agency |
|---|---|---|---|---|
| 2026-04-01 | NICOR GAS | TROY GROVE, La Salle, IL | Pass | State |
| 2026-04-01 | NICOR GAS | TROY GROVE, La Salle, IL | Pass | State |
| 2026-04-01 | NICOR GAS | TROY GROVE, La Salle, IL | 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.