EPA Air · by county
Air-emissions sources in St. Clair County, Michigan
- 59Facilities
Every stationary source in St. Clair County, Michigan that holds a Clean Air Act permit or is otherwise tracked by an air agency — planned, under construction, operating, seasonal or temporarily closed. Sources EPA records as permanently closed are not listed.
Every source’s record in St. Clair County
Each of the 59 operating major, synthetic minor and minor sources in St. Clair County, Michigan has a record page: every source in St. Clair County, A to Z.
By emissions classification in St. Clair County
A source’s classification is the size band its potential emissions put it in: a major source is large enough to need a Title V operating permit, a synthetic minor has accepted limits to stay below that line, and a minor source sits below it outright.
Inspections in St. Clair County, by year
A compliance evaluation is the on-site or file review a state, local or federal air agency records against a permitted source.
- 2026 inspections 23
- 2025 inspections 30
- 2024 inspections 24
- 2023 inspections 24
- 2022 inspections 30
- 2021 inspections 36
- 2020 inspections 35
- 2019 inspections 27
- 2018 inspections 27
- 2017 inspections 38
Violations in St. Clair County, by year
A high-priority violation is the most serious class of Clean Air Act non-compliance an agency records against a source; a federally reportable violation is the next step down in severity.
- 2024 violations 3
- 2023 violations 10
- 2022 violations 4
- 2020 violations 3
- 2019 violations 8
- 2018 violations 5
Stack tests in St. Clair County, by year
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
- 2026 stack tests 23
- 2025 stack tests 30
- 2024 stack tests 9
- 2023 stack tests 16
- 2022 stack tests 38
- 2021 stack tests 26
- 2020 stack tests 26
- 2019 stack tests 22
- 2018 stack tests 27
- 2017 stack tests 25
Inspections in St. Clair County, year by year · Violations in St. Clair County, year by year · Stack tests in St. Clair County, year by year
Other counties in Michigan
Every county in the state with at least three sources on file.
- Oceana County 4
- Ogemaw County 8
- Ontonagon County 4
- Osceola County 13
- Oscoda County 10
- Otsego County 143
- Ottawa County 82
- Presque Isle County 7
- Saginaw County 38
- Sanilac County 14
- Schoolcraft County 5
- Shiawassee County 20
- St. Joseph County 33
- Tuscola County 19
- Undetermined County 7
- Van Buren County 19
- Washtenaw County 59
- Wayne County 351
- Wexford County 20
Facilities
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.
What this page shows
This page covers Clean Air Act facilities in St. Clair county, MI. It lists 59 facilities in St. Clair county, of which 9 are major sources.