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EWG's Tap Water Database — 2021 UPDATE

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Montana

  • 753 Utilities

  • Serving: 734,000

  • Data available: 2014-2019

  • 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, MT68,200

Utilities that accumulated/accrued the most violation points as of April 2019 to March 2021 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
Whitehall, Town ofWhitehall, MT1,100100
Harlem, City ofHarlem, MT82097
Elk Creek ColonyAugusta, MT8453
Riverview ColonyChester, MT13045
Tiber County Water DistrictConrad, MT75040
Tiber Service AreaHavre, MT20040
Crystal Springs Water SystemBillings, MT22540
King Ranch ColonyLewistown, MT5636
Worden Ballantine YellowstoneWorden, MT80030
Turner ColonyTurner, MT5525
Bee Hive Homes Msla UnapprovedMissoula, MT10620
White Sulphur Springs, City ofWhite Sulphur Springs, MT1,00012
Kingsbury ColonyValier, MT12010
Broadwater Estates HoaHelena, MT4010
Wegner Water Service HaulerHardin, MT509
Wilderness Plateau Water and Sewer DistrictTroy, MT2087
Western Mobile Village DillonWilsall, MT757
Crystal Lakes Utility CompanyEureka, MT857
Basin County Water and Sewer DistrictBasin, MT2506
Lambert Sewer and Water AssociationLambert, MT1506
Rivers Edge Mobile Park LibbyLibby, MT606
Avalon SubdivisionLivingston, MT1356
Milford Colony Inc.Wolf Creek, MT676
Dodson, Town ofDodson, MT1206
Baker, City ofBaker, MT1,9485
Spring Meadows County Water DistrictMissoula, MT1625
Spring Tree RidgeGreat Falls, MT805
Denton, Town ofDenton, MT2555
Bynum - Teton Co. W & S DistrictBynum, MT655
Wilsall Water DistrictWilsall, MT2505

Large utilities that accumulated/accrued the most violation points as of April 2019 to March 2021 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)
273594,854273595,529

Bromodichloromethane
231580,032230580,007

Nitrate and nitrite
540558,524689718,202

Haloacetic acids (HAA5)
237557,937237577,920

Bromochloroacetic acid
192533,306191533,281

Dibromoacetic acid
195474,136195474,166

Chloroform
214467,843235569,491

Arsenic
282460,448274457,821

Dibromochloromethane
206459,740208484,941

Dichloroacetic acid
192458,530192460,455

Trichloroacetic acid
161434,291161434,966

Haloacetic acids (HAA9)
40381,55539381,362

Radium, combined (-226 & -228)
424356,302464452,088

Chromium (hexavalent)
36356,01542396,575

Uranium
381352,266394395,251

Nitrate
121185,659154190,803

Bromoform
7149,930103151,884

Cadmium
231,045231,045

Chlorate
120,0089187,743

Barium
22,655289398,837

Thallium
21,98442,117

Manganese
51,24285424,336

Di(2-ethylhexyl) phthalate
16501813,408

Radon
13001300

Benzene
12251225

Antimony
213838,673

Beryllium
1403420

Contaminants found in Montana above legal limits