Montana

Superfund NPL sites

water systems with PFAS detections

systems above a final limit

41.6M lb

reported 2024 releases

Superfund NPL sites, by county

Counties

County	NPL	Cleanup sites	PFAS systems	TRI facilities	Open tank releases
Yellowstone County	2	5	0	13	151
Gallatin County	1	2	0	4	18
Missoula County	2	8	0	4	22
Flathead County	1	7	2	5	63
Cascade County	3	8	1	3	83
Lewis and Clark County	2	12	0	2	52
Ravalli County	0	1	1	2	0
Silver Bow County	1	5	0	5	25
Lake County	0	3	0	0	36
Lincoln County	2	6	0	1	6
Park County	0	5	0	0	6
Hill County	0	1	0	0	47
Sanders County	0	2	0	1	6
Glacier County	0	4	0	1	26
Jefferson County	1	10	0	3	7
Big Horn County	0	2	0	2	30
Custer County	0	1	0	1	27
Fergus County	0	2	0	0	22
Carbon County	0	1	0	0	10
Richland County	0	0	0	1	16
Roosevelt County	0	1	0	0	37
Beaverhead County	0	3	0	0	6
Deer Lodge County	2	2	0	1	3
Madison County	0	2	1	0	14
Stillwater County	1	3	0	3	16
Dawson County	0	0	0	1	33
Rosebud County	0	2	0	1	34
Broadwater County	0	0	0	2	11
Valley County	0	3	0	0	36
Powell County	0	1	0	0	2
Blaine County	0	2	0	0	16
Teton County	0	0	0	0	10
Pondera County	0	0	0	0	16
Chouteau County	0	1	0	0	15
Musselshell County	0	2	0	0	5
Toole County	0	0	0	2	14
Mineral County	1	2	0	0	1
Phillips County	0	0	0	0	18
Sweet Grass County	0	0	0	1	2
Granite County	0	2	0	0	4
Sheridan County	0	0	0	1	4
Fallon County	0	0	0	0	9
Judith Basin County	0	0	0	0	7
Meagher County	0	0	0	0	6
Wheatland County	0	1	0	0	9
Liberty County	0	0	0	0	6
Powder River County	0	0	0	0	8
McCone County	0	0	0	1	3
Daniels County	0	0	0	0	3
Carter County	0	0	0	0	7
Garfield County	0	1	0	0	4
Prairie County	0	0	0	0	6
Wibaux County	0	0	0	0	1
Golden Valley County	0	0	0	0	1
Treasure County	0	0	0	0	4
Petroleum County	0	0	0	0	3