EPA Air · by county
Air-emissions sources in Mason County, Michigan
- 16Facilities
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Every stationary source in Mason 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 Mason County
Each of the 16 operating major, synthetic minor and minor sources in Mason County, Michigan 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.
Inspections in Mason 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 4
- 2025 inspections 8
- 2024 inspections 8
- 2023 inspections 4
- 2022 inspections 7
- 2021 inspections 10
- 2020 inspections 6
- 2018 inspections 7
- 2017 inspections 6
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.
Inspections in Mason County, year by year · Stack tests in Mason County, year by year
Other counties in Michigan
Every county in the state with at least three sources on file.
- Kent County 193
- Lapeer County 11
- Leelanau County 4
- Lenawee County 36
- Livingston County 35
- Luce County 4
- Mackinac County 3
- Macomb County 172
- Manistee County 38
- Marquette County 22
- Mecosta County 8
- Menominee County 18
- Midland County 28
- Missaukee County 8
- Monroe County 40
- Montcalm County 19
- Montmorency County 71
- Muskegon County 61
- Newaygo County 9
Facilities
| Facility↑↓ | Classification↑↓ | HPV |
|---|---|---|
| CARROM COMPANY | Synthetic minor source | No |
| COMPONENT SERVICES | Minor source | No |
| CONSUMERS ENERGY-LUDINGTON PUMPED STORAGE FACILITY | Synthetic minor source | No |
| DTE MICHIGAN POWER, LLC | Major source | No |
| FLORACRAFT CORPORATION | Synthetic minor source | No |
| GREAT LAKES CASTINGS LLC | Major source | No |
| HARSCO RAIL | Minor source | No |
| KAINES WEST MICHIGAN | Minor source | No |
| LAKE MICHIGAN CAR FERRY SERVICE | Minor source | No |
| METALWORKS INC | Minor source | No |
| OCCIDENTAL CHEMICAL CORPORATION | Major source | No |
| OMIMEX - VICTORY 32 FACILITY | Synthetic minor source | No |
| RIETH RILEY CONSTRUCTION COMPANY, INC. | Synthetic minor source | No |
| SARGENT SAND COMPANY | Minor source | No |
| STRAITS STEEL & WIRE | Minor source | No |
| THOROUGHBRED BOAT COMPANY | Minor source | No |
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 Mason county, MI. It lists 16 facilities in Mason county, of which 3 are major sources.