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EWG's Tap Water Database

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Montana

  • 727 Utilities

  • Serving: 715,000

  • Data available: 2010-2015

  • Contaminants Found: 65

 

EWG's drinking water quality report for Montana shows results of tests conducted by the water utilities in Montana and provided to EWG by the Montana Department of Environmental Quality.

LARGE UTILITIES
ALL UTILITIES WITH VIOLATIONS
LARGE UTILITIES WITH VIOLATIONS

Below are utilities in Montana serving over 10,000 people, listed alphabetically.

Large utilities in Montana

UtilityLocationPeople
Served
Butte-Silver Bow Water DepartmentButte, MT33,000
City of BillingsBillings, MT114,000
City of BozemanBozeman, MT32,000
City of Great FallsGreat Falls, MT60,000
Co Water District of Billings HeightsBillings, MT12,000
Helena Water SystemHelena, MT31,005
Kalispell Public WorksKalispell, MT20,008
Mountain Water CompanyMissoula, MT56,335

Utilities that accumulated/accrued the most violation points as of October 2014 to September 2017 in Montana

The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.

UtilityLocationPeople
Served
Violation
Points
Beaverhead Jackson Water and Sewer DistrictJackson, MT21138
Blue Cloud SubdivisionHelena, MT6095
Clarks LookoutDillon, MT6290
Harlem, City ofHarlem, MT82059
Blue Sky Heights Wua ClancyClancy, MT25050
King Ranch ColonyLewistown, MT5650
Whitehall, Town ofWhitehall, MT1,10045
Wegner Water Service HaulerHardin, MT5036
Turner ColonyTurner, MT5536
Pinesdale, Town ofWhitefish, MT80025
St. Labre Indian SchoolAshland, MT65022
Hidden Lake ColonyCut Bank, MT8015
Eureka, Town ofEureka, MT1,6756
Huntley Yellowstone County Water and SewerHuntley, MT2306
Big Bend Ranch SubdivisionGreat Falls, MT1006
Two Buttes Water Users AssociationSun River, MT5256
Futura Trailer ParkMissoula, MT1806
Big Timber, City ofBig Timber, MT1,6505
Ronan, City ofRonan, MT2,3505
Shady Nook Trailer CourtDillon, MT345
Pine Crest Trailer ParkSan Jose, MT545
Windsor EstatesNorris, MT5305
Spring Tree RidgeGreat Falls, MT755
Denton, Town ofDenton, MT3015
Lambert Sewer and Water AssociationLambert, MT1504
Whispering Trees Mobile ParkBozeman, MT1004
Big Sky Mobile ManorColumbia Falls, MT354
High Country ParkLibby, MT764
Covered Wagon Mobile Home ParkNorris, MT5004
Prairie Water CompanyGreat Falls, MT1,0003

Large utilities that accumulated/accrued the most violation points as of October 2014 to September 2017 in Montana

The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.

UtilityLocationPeople
Served
Violation
Points
Helena Water SystemHelena, MT31,0051

Contaminants found in Montana above health guidelines

Found above health guidelinesFound
Contaminant# of UtilitiesPeople Served# of UtilitiesPeople Served

Total trihalomethanes (TTHMs)
174489,320180548,866

Bromodichloromethane
160454,199168537,465

Chloroform
141426,611160517,345

Dichloroacetic acid
132423,643135430,618

Trichloroacetic acid
125421,937125421,937

Arsenic
104382,049104382,049

Dibromochloromethane
127350,037141416,848

Chromium (hexavalent)
35344,08840384,578

Uranium
315335,392327351,838

Radium-226
230253,028252268,115

Radium-228
184227,015184227,015

Chlorate
120,0089176,234

Nitrate and nitrite
193,286633682,489

Bromoform
41,41443103,835

Manganese
1650838,640

Tetrachloroethylene (perchloroethylene)
12901290

Barium
1656490,949

Nitrate
1653824,079

Antimony
1212911

Contaminants found in Montana above legal limits