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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 2015 to September 2018 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, MT21148
Clarks LookoutDillon, MT62101
Harlem, City ofHarlem, MT82082
Whitehall, Town ofWhitehall, MT1,10065
Turner ColonyTurner, MT5556
Wegner Water Service HaulerHardin, MT5037
St. Labre Indian SchoolAshland, MT65036
Elk Creek ColonyAugusta, MT8423
Oilmont County Water DistrictShelby, MT30021
King Ranch ColonyLewistown, MT5620
City of Great FallsGreat Falls, MT60,00015
Black Eagle Cascade County Water SewerBlack Eagle, MT1,00015
Wilsall Water DistrictWilsall, MT25010
Pine Crest Trailer ParkSan Jose, MT5410
Rockport ColonyPendroy, MT8810
Whispering Trees Mobile ParkBozeman, MT1008
Milford Colony Inc.Wolf Creek, MT676
Futura Trailer ParkMissoula, MT1806
Ronan, City ofRonan, MT2,3505
Antelope County Water and SewerAntelope, MT595
Denton, Town ofDenton, MT3015
Sunny Meadows Water and Sewer DistrictMissoula, MT1225
Spring Tree RidgeGreat Falls, MT755
Riverview ColonyChester, MT1305
Spring Meadows County Water DistrictMissoula, MT1625
Big Timber, City ofBig Timber, MT1,6505
Big Sky Mobile ManorColumbia Falls, MT354
Livingston, City ofLivingston, MT7,5004
Sand Coulee Water DistrictSand Coulee, MT1614
Big Bend Ranch SubdivisionGreat Falls, MT1004

Large utilities that accumulated/accrued the most violation points as of October 2015 to September 2018 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
City of Great FallsGreat Falls, MT60,00015
Helena Water SystemHelena, MT31,0051

Contaminants found in Montana above health guidelines

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

Bromodichloromethane
168537,465168537,465

Total trihalomethanes (TTHMs)
174489,320180548,866

Chloroform
156438,406160517,345

Dichloroacetic acid
132423,643135430,618

Trichloroacetic acid
125421,937125421,937

Dibromochloromethane
140416,754141416,848

Arsenic
104382,049104382,049

Chromium (hexavalent)
35344,08840384,578

Uranium
315335,392327351,838

Radium-226
230253,028252268,115

Radium-228
184227,015184227,015

Bromoform
3433,84543103,835

Chlorate
120,0089176,234

Nitrate and nitrite
193,286633682,489

Manganese
1650838,640

Tetrachloroethylene (perchloroethylene)
12901290

Nitrate
1653824,079

Barium
1656490,949

Antimony
1212911

Contaminants found in Montana above legal limits