EPA Air · by county
Air-emissions sources in Bay County, Michigan
- 31Facilities
Every stationary source in Bay 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 Bay County
Each of the 29 operating major, synthetic minor and minor sources in Bay County, Michigan has a record page: every source in Bay County, A to Z.
By emissions classification in Bay 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 Bay 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 10
- 2025 inspections 13
- 2024 inspections 21
- 2023 inspections 21
- 2022 inspections 15
- 2021 inspections 16
- 2020 inspections 17
- 2019 inspections 21
- 2018 inspections 25
- 2017 inspections 54
Violations in Bay 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.
Stack tests in Bay County, by year
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
- 2026 stack tests 4
- 2025 stack tests 8
- 2023 stack tests 3
- 2022 stack tests 3
- 2019 stack tests 3
- 2018 stack tests 3
Inspections in Bay County, year by year · Violations in Bay County, year by year · Stack tests in Bay County, year by year
Other counties in Michigan
Every county in the state with at least three sources on file.
- Alcona County 9
- Alger County 6
- Allegan County 50
- Alpena County 22
- Antrim County 38
- Arenac County 4
- Baraga County 10
- Barry County 14
- Benzie County 4
- Berrien County 69
- Branch County 27
- Calhoun County 69
- Cass County 16
- Charlevoix County 17
- Cheboygan County 5
- Chippewa County 15
- Clare County 13
- Clinton County 11
- Crawford County 16
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 the EPA air register for Bay county, MI. It lists 31 facilities in Bay county, of which 5 are major sources.