EPA-regulated facilities in Mason County, MI

There are 255 EPA-regulated facilities inside Mason County, Michigan. The most common kinds are hazardous waste (169), water discharge (58), air emissions (41). None is in significant noncompliance, but 10 have a violation on record. Penalties over the last five years total $5.3M across 1 site.

Open the map of Mason County

255facilities in the county
0in significant noncompliance
10with a violation on record
$5.3Min penalties, last 5 years

By category

CategoryFacilities
Hazardous waste169
Small quantity generators85
Transporters1
Chemical (RMP/TRI)14
Superfund5
Air emissions41
Major sources4
Synthetic minor sources7
Minor sources8
Water discharge58
Major permits2
Minor permits38
Drinking water systems12
Greenhouse gas reporters3

A facility enrolled in several programs counts once in the total and once in each of its categories.

Largest penalties

Penalties assessed over the last five years.

Superfund sites

Bordering counties

Reading these numbers

These are regulatory records, not measurements of pollution. Most facilities appear because they hold a permit or file reports, and most of them are compliant; a listing is not a claim that a facility has polluted anything. Compliance status and penalties are the EPA's own determinations in data retrieved Oct 9, 2026. The Data page explains where each record comes from and how it can mislead.