EPA Air · by county
Air-emissions sources in Mason County, Illinois
- 40Facilities
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Every stationary source in Mason 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 Mason County
Each of the 40 operating major, synthetic minor and minor sources in Mason County, Illinois has a record page: every source in Mason County, A to Z.
By emissions classification in Mason 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.
- Minor source 39
Stack tests in Mason County, by year
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
Stack tests in Mason County, year by year
Other counties in Illinois
Every county in the state with at least three sources on file.
- Lake County 673
- Lawrence County 25
- Lee County 74
- Livingston County 103
- Logan County 51
- Macon County 150
- Macoupin County 70
- Madison County 326
- Marion County 101
- Marshall County 37
- Massac County 21
- McDonough County 57
- McHenry County 342
- McLean County 200
- Menard County 17
- Mercer County 26
- Monroe County 35
- Montgomery County 65
- Morgan County 65
Facilities
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.