EPA-regulated facilities in Lake County, MT

There are 645 EPA-regulated facilities inside Lake County, Montana. The most common kinds are water discharge (480), drinking water systems (121), hazardous waste (54). 5 are currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 18 have a violation on record.

Open the map of Lake County

645facilities in the county

5in significant noncompliance

18with a violation on record

$0in penalties, last 5 years

By category

Category	Facilities
Hazardous waste	54
Small quantity generators	31
Transporters	2
Chemical (RMP/TRI)	2
Superfund	3
Air emissions	15
Major sources	1
Minor sources	3
Water discharge	480
Minor permits	171
Drinking water systems	121
Greenhouse gas reporters	1
Scrap yards	2

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

In significant noncompliance

The EPA's designation for its most serious or persistent violations, as of the latest data.

RONAN CITY WWTF 205 MINK LN, RONAN, MT, 59864 Significant noncompliance
TIMBERLANE AUTO LLC 36970 TIMBERLANE ROAD, RONAN, MT, 59864 Significant noncompliance
CONSOLIDATED CHARLO-LAKE COUNTY WATER&SEWER DIST 106 4TH AVENUE EAST, CHARLO, MT, 59824 Significant noncompliance
ST. IGNATIUS-SOUTHSIDE NE1/4 OF SW1/4 OF S14 T18 R20, ST. IGNATIUS, MT, 59865 Significant noncompliance
AUNTIES EMPORIUM-TREATMENT PLANT PO BOX 481, ARLEE, MT, 59821 Significant noncompliance

Superfund sites

PABLO TIRE FIRE US HIGHWAY 93, PABLO, MT, 59855
CSKT ACID 301 MAIN STREET, POLSEN, MT, 59860
FWS-NATIONAL BISON RANGE CNTY RD 212 IN MOIESE, MOIESE, MT, 59824

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.