EPA Air · by county
Air-emissions sources in Monroe County, Wisconsin
- 46Facilities
Every stationary source in Monroe County, Wisconsin 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 Monroe County
Each of the 46 operating major, synthetic minor and minor sources in Monroe County, Wisconsin has a record page: every source in Monroe County, A to Z.
By emissions classification in Monroe 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 Monroe 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 78
- 2025 inspections 77
- 2024 inspections 67
- 2023 inspections 23
- 2022 inspections 27
- 2021 inspections 11
- 2020 inspections 14
- 2019 inspections 13
- 2018 inspections 17
- 2017 inspections 22
Violations in Monroe 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.
- 2026 violations 25
- 2025 violations 19
- 2024 violations 11
- 2023 violations 26
- 2022 violations 4
- 2021 violations 4
- 2018 violations 4
- 2017 violations 10
Stack tests in Monroe County, by year
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
- 2026 stack tests 20
- 2025 stack tests 25
- 2024 stack tests 35
- 2023 stack tests 41
- 2022 stack tests 35
- 2021 stack tests 37
- 2020 stack tests 28
- 2019 stack tests 35
- 2018 stack tests 32
- 2017 stack tests 34
Inspections in Monroe County, year by year · Violations in Monroe County, year by year · Stack tests in Monroe County, year by year
Other counties in Wisconsin
Every county in the state with at least three sources on file.
- Juneau County 7
- Kenosha County 16
- Kewaunee County 8
- La Crosse County 30
- Lincoln County 7
- Manitowoc County 20
- Marathon County 31
- Marinette County 12
- Menominee County 16
- Milwaukee County 50
- Oconto County 14
- Oneida County 6
- Outagamie County 6
- Ozaukee County 21
- Pepin County 3
- Polk County 5
- Portage County 4
- Price County 12
- Racine County 15
Facilities
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.