EPA Air · by county
Air-emissions sources in St. Clair County, Illinois
- 328Facilities
Every stationary source in St. Clair County, Illinois 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 324 operating major, synthetic minor and minor sources in St. Clair County, Illinois 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 12
- 2025 inspections 19
- 2024 inspections 26
- 2023 inspections 24
- 2022 inspections 12
- 2021 inspections 9
- 2020 inspections 19
- 2019 inspections 8
- 2018 inspections 7
- 2017 inspections 10
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.
- 2026 violations 5
- 2025 violations 5
- 2024 violations 4
- 2023 violations 7
- 2022 violations 4
- 2021 violations 6
- 2020 violations 4
- 2018 violations 4
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.
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 Illinois
Every county in the state with at least three sources on file.
- Pulaski County 13
- Putnam County 21
- Randolph County 57
- Richland County 26
- Rock Island County 166
- Saline County 53
- Sangamon County 195
- Schuyler County 18
- Scott County 12
- Shelby County 48
- Stark County 14
- Stephenson County 84
- Tazewell County 163
- Undetermined County 3
- Union County 15
- Vermilion County 131
- Wabash County 19
- Warren County 37
- Washington County 39
Facilities
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.