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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 January to March 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, MT21130
Blue Cloud SubdivisionHelena, MT60100
Clarks LookoutDillon, MT6280
King Ranch ColonyLewistown, MT5670
Blue Sky Heights Wua ClancyClancy, MT25061
Harlem, City ofHarlem, MT82046
Turner ColonyTurner, MT5536
Whitehall, Town ofWhitehall, MT1,10035
Wegner Water Service HaulerHardin, MT5030
Pinesdale, Town ofWhitefish, MT80025
Godfrey Canyon EstatesManhattan, MT8720
Rivershore Mobile Home ParkGreat Falls, MT9012
Spring Tree RidgeGreat Falls, MT7512
Huntley Yellowstone County Water and SewerHuntley, MT2307
St. Labre Indian SchoolAshland, MT6507
Futura Trailer ParkMissoula, MT1806
Big Timber, City ofBig Timber, MT1,6505
Ronan, City ofRonan, MT2,3505
Sunrise Terrace No. 1 Homeowners AssociationKalispell, MT855
Two Buttes Water Users AssociationSun River, MT5255
Eureka, Town ofEureka, MT1,6755
Phoenix ParkEast Helena, MT365
Butte-Silver Bow Water DepartmentButte, MT33,0005
Denton, Town ofDenton, MT3015
Northwoods Water System Co-op Inc.Kalispell, MT1355
Big Bend Ranch SubdivisionGreat Falls, MT1005
Big Sky Mobile ManorColumbia Falls, MT354
Tiber County Water DistrictConrad, MT7504
Lambert Sewer and Water AssociationLambert, MT1504
Wapiti Acres County Water and Sewer DistrictKalispell, MT324

Large utilities that accumulated/accrued the most violation points as of January to March 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
Butte-Silver Bow Water DepartmentButte, MT33,0005
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)
175493,235181552,781

Bromodichloromethane
161458,114169541,380

Chloroform
142430,526161521,260

Dichloroacetic acid
133427,558136434,533

Trichloroacetic acid
126425,852126425,852

Arsenic
102381,929102381,929

Dibromochloromethane
128353,952142420,763

Chromium (hexavalent)
35344,08840384,578

Uranium
317339,299330355,870

Radium-226
232256,996254272,083

Radium-228
186227,103186227,103

Chlorate
120,0089176,234

Nitrate and nitrite
183,226640686,752

Bromoform
41,41444107,750

Manganese
1650838,640

Tetrachloroethylene (perchloroethylene)
12901290

Barium
1656290,804

Nitrate
1653925,209

Antimony
1212911

Contaminants found in Montana above legal limits