Tap WaterIndex

← All states

Tap water quality report

Montana

Across Montana's 818 community water suppliers, 0.8% exceed the EPA lead action level and 5% have detectable PFAS.

0.8%
exceed lead action level
(6/800 suppliers)
5%
PFOA/PFOS detected
(2/40 suppliers)
818
water suppliers
Lead by supplier PFAS by supplier

Largest water suppliers

Lead is the LCR 90th-percentile result; a value above 0.015 mg/L exceeds the EPA action level. “—” means no lead sample is on file for that supplier.
SupplierCityPopulationLead (p90)
Billings City of Billings 114,000 0.0050 mg/L
Missoula Water Missoula 68,200 0.0010 mg/L
Great Falls City of Great Falls 60,000 0.0120 mg/L
Bozeman City of Bozeman 56,000 0.0016 mg/L
Butte Silverbow Water Dept Butte 33,000 0.0020 mg/L
Helena Water System Helena 32,091 0.0030 mg/L
Kalispell Public Works Kalispell 25,000 0.0020 mg/L
Billings Heights Co Water Dist of Billings 12,000 0.0030 mg/L
Belgrade City of Belgrade 10,460 0.0018 mg/L
Whitefish City of Whitefish 10,418 0.0020 mg/L
Havre City of Havre 9,921 0.0030 mg/L
West Yellowstone Town of West Yellowstone 9,899 0.0013 mg/L
Miles City City of Miles City 9,565 0.0030 mg/L
Malmstrom Air Force Base Great Falls 8,850 0.0000 mg/L
Flathead County Water and Sewer Kalispell 7,775 0.0010 mg/L
Livingston City of Livingston 7,500 0.0020 mg/L
Anaconda Water Department Anaconda 6,750 0.0080 mg/L
Laurel Municipal Water System Laurel 6,339 0.0020 mg/L
Bigfork County Water and Sewer Bigfork 6,100 0.0010 mg/L
Lewistown City of Lewistown 5,923 0.0000 mg/L
Lockwood Water and Sewer District Billings 5,900 0.0030 mg/L
Hamilton City of Hamilton 5,660 0.0010 mg/L
Polson City of Polson 5,300 0.0020 mg/L
Sidney City of Sidney 5,000 0.0040 mg/L
Libby City of Libby 4,892 0.0020 mg/L
Glendive City of Glendive 4,873 0.0060 mg/L
Town of Browning Browning 4,671 0.0020 mg/L
Columbia Falls City of Columbia Falls 4,450 0.0040 mg/L
North Star Zoot Water Bozeman 4,323 0.0030 mg/L
Dillon City of Dillon 4,300 0.0030 mg/L
River Rock County Water and Sewer Dist Belgrade 4,200 0.0028 mg/L
Big Sky County Water and Sewer Dist 363 Big Sky 4,132 0.0048 mg/L
Shelby City of Shelby 3,970 0.0020 mg/L
Hardin City of Hardin 3,500 0.0000 mg/L
Lolo Water and Sewer Dist Lolo 3,315 0.0020 mg/L
Glasgow City of Glasgow 3,253 0.0060 mg/L
Cut Bank City of Cut Bank 3,105 0.0000 mg/L
Poplar, City of Poplar 3,025 0.0000 mg/L
Dry Prairie Rural Water Authority Culbertson 3,005 0.0030 mg/L
Wolf Point City of Wolf Point 3,000 0.0000 mg/L
Deer Lodge City of Deer Lodge 2,900 0.0020 mg/L
Lame Deer Water System Lame Deer 2,605 0.0000 mg/L
Fort Belknap Agency Water System Harlem 2,600 0.0010 mg/L
Conrad Water Dept Conrad 2,500 0.0030 mg/L
Ronan City of Ronan 2,483 0.0000 mg/L
Big Mountain Water Company Whitefish 2,435 0.0070 mg/L
Colstrip City of Colstrip 2,350 0.0010 mg/L
Rae Water and Sewer Dist 313 Bozeman 2,325 0.0020 mg/L
Forsyth City of Forsyth 2,260 0.0020 mg/L
Pablo Lake County Water and Sewer Dist Pablo 2,175 0.0030 mg/L
East Helena City of Helena 2,114 0.0010 mg/L
Troy City of Troy 2,100 0.0020 mg/L
Montana State Prison Deer Lodge 2,100 0.0020 mg/L
Stevensville Town of Stevensville 2,090 0.0000 mg/L
Crow Agency Water System Crow Agency 2,057 0.0010 mg/L
Rocky Boy'S Rural Water Box Elder 2,000 0.0000 mg/L
Townsend City of Townsend 2,000 0.0010 mg/L
Red Lodge Water Dept Red Lodge 2,000 0.0040 mg/L
Eastgate Village Sewer and Water East Helena 2,000 0.0010 mg/L
Eureka Town of Eureka 1,995 0.0010 mg/L
Fairmont Hot Springs Resort Anaconda 1,965 0.0020 mg/L
Thompson Falls City of Thompson Falls 1,950 0.0000 mg/L
Roundup Water Department Roundup 1,900 0.0410 mg/L
Columbus Town of Columbus 1,900 0.0040 mg/L
Three Forks City of Three Forks 1,900 0.0020 mg/L
Baker City of Baker 1,858 0.0030 mg/L
Malta City of Malta 1,800 0.0020 mg/L
Manhattan Town of Manhattan 1,800 0.0020 mg/L
Sun Prairie Village County Great Falls 1,800 0.0010 mg/L
Assiniboine & Sioux Rural Water System Poplar 1,726 0.0000 mg/L
Hill County Water Districts Havre 1,720 0.0010 mg/L
Plentywood Water Department Plentywood 1,700 0.0000 mg/L
Plains Town of Plains 1,700 0.0020 mg/L
Choteau City of Choteau 1,691 0.0040 mg/L
Big Timber City of Big Timber 1,650 0.0030 mg/L
Seeley Lake Water District Seeley Lake 1,575 0.0040 mg/L
Two Medicine Water - East Glacier Browning 1,504 0.0030 mg/L
Fort Benton City of Fort Benton 1,500 0.0020 mg/L
Virginia City Water Dept Virginia City 1,500 0.0000 mg/L
Whitehall Town of Whitehall 1,500 0.0020 mg/L
Rocky Boy Agency Water System Box Elder 1,442 0.0020 mg/L
Ennis Town of Ennis 1,400 0.0000 mg/L
Boulder City of Boulder 1,400 0.0000 mg/L
Philipsburg Town of Philipsburg 1,360 0.0010 mg/L
El Mar Estates Msla Co Water Frenchtown 1,350 0.0010 mg/L
Chinook City of Chinook 1,300 0.0000 mg/L
Va Medical Center Helena Fort Harrison 1,275 0.0070 mg/L
Black Eagle Cascade County Water Sewer Black Eagle 1,233 0.0000 mg/L
Lakeside Water System Lakeside 1,225 0.0030 mg/L
Forest Park Water Rsid 24 Glendive 1,200 0.0010 mg/L
Helena Leisure Llc Helena 1,200 0.0010 mg/L
Hungry Horse Co Water and Sewer District Hungry Horse 1,135 0.0000 mg/L
Absarokee Water and Sewer Dist Absarokee 1,100 0.0050 mg/L
Superior Town of Superior 1,100 0.0010 mg/L
Cmrwa Musselshell Judith Rural Water Sys Harlowton 1,100 —
Harlowton City of Harlowton 1,050 0.0020 mg/L
St Mary Headquarters and Cg West Glacier 1,030 0.0100 mg/L
Scobey City of Scobey 1,026 0.0000 mg/L
White Sulphur Springs City of White Sulphur Springs 1,000 0.0020 mg/L
Fairview Town of Fairview 1,000 0.0010 mg/L