EPA-regulated facilities in Madison County, MT

There are 634 EPA-regulated facilities inside Madison County, Montana. The most common kinds are water discharge (557), drinking water systems (50), hazardous waste (18). None is in significant noncompliance, but 7 have a violation on record.

Open the map of Madison County

634facilities in the county

0in significant noncompliance

7with a violation on record

$0in penalties, last 5 years

By category

Category	Facilities
Hazardous waste	18
Large quantity generators	1
Small quantity generators	10
Superfund	2
Air emissions	16
Minor sources	3
Water discharge	557
Minor permits	507
Drinking water systems	50
Scrap yards	1

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

Superfund sites

USDA FS ENNIS LYONS STATION 45 MI S OF ENNIS ON HWY 287, ENNIS, MT, 59729
NORRIS LABS 104 STERLING ROAD, NORRIS, MT, 59745

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.