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EWG's Tap Water Database — 2021 UPDATE

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Wyoming

  • 319 Utilities

  • Serving: 491,000

  • Data available: 2014-2019

  • Contaminants Found: 59

 

EWG's drinking water quality report for Wyoming shows results of tests conducted by the water utilities in Wyoming and provided to EWG by the US EPA Region 8.

LARGE UTILITIES
ALL UTILITIES WITH VIOLATIONS
LARGE UTILITIES WITH VIOLATIONS

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

Large utilities in Wyoming

UtilityLocationPeople
Served
Cheyenne Board Public UtilitiesCheyenne, WY58,182
City of CasperCasper, WY58,343
City of EvanstonEvanston, WY12,000
City of GilletteGillette, WY32,222
City of Green RiverGreen River, WY10,500
City of LaramieLaramie, WY30,899
City of RivertonRiverton, WY10,001
City of Rock SpringsRock Springs, WY24,000
City of SheridanSheridan, WY15,500
South Cheyenne Water and Sewer DistrictCheyenne, WY10,000

Utilities that accumulated/accrued the most violation points as of April 2019 to March 2021 in Wyoming

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
Lance Creek Water DistrictLance Creek, WY4582
Mountain Village ParksJamestown, WY5338
Manville, Town OfManville, WY5237
Southfork EstatesGillette, WY14415
Marbleton, Town OfMarbleton, WY78014
Chugwater, Town OfChugwater, WY20012
Red Lane Domestic Water, Inc.Thermopolis, WY11111
Potlatch Trailer CourtTorrington, WY7010
Albin, Town OfAlbin, WY1817
Shoshoni, Town OfShoshoni, WY6507
Alpine, Town OfAlpine, WY1,1007
Rivermeadows Water DistrictJackson, WY1006
Second Fike SubdivisionRiverton, WY346
Roberts Trailer ParkHulett, WY326
Mountain View, Town OfMountain View, WY1,2506
Leisure Valley Inc/ Star Valley Rv ParkThayne, WY4336
South Riverside Acres Water Improvement DistrictEvansville, WY706
Jeffrey City Water & Sewer DistrictJeffrey City, WY595
Wrangler EstatesGillette, WY2505
Superior, Town OfSuperior, WY3565
Country Meadow EstatesLaramie, WY3755
Fairview Water & Sewer DistrictGrover, WY2305
Granger, Town OfGranger, WY1395
Broken Wrench LlcCasper, WY305
Evergreen Mobile Home ParkCheyenne, WY505
Wheatland, Town OfWheatland, WY3,6275
Turnerville Water and Sewer DistrictGrover, WY905
Kennington Springs PipelineGrover, WY455
Jackson, Town OfJackson, WY8,0004
Cokeville, Town OfCokeville, WY5354

Large utilities that accumulated/accrued the most violation points as of April 2019 to March 2021 in Wyoming

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 SheridanSheridan, WY15,5001

Contaminants found in Wyoming above health guidelines

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

Total trihalomethanes (TTHMs)		210455,614202452,361

Haloacetic acids (HAA5)		193445,456183441,927

Nitrate and nitrite		189342,322249435,560

Bromodichloromethane		175340,678165337,149

Radium, combined (-226 & -228)		172332,889152325,497

Chloroform		154332,280158333,057

Bromochloroacetic acid		140327,001130323,472

Dichloroacetic acid		127324,889117321,360

Dibromochloromethane		170318,453160314,924

Trichloroacetic acid		106310,60196307,072

Dibromoacetic acid		154309,872145309,710

Uranium		135293,730125293,913

Haloacetic acids (HAA9)		51284,42449289,519

Chromium (hexavalent)		48262,66446271,060

Arsenic		86250,58072245,400

Bromoform		89168,141108226,636

Nitrate		24110,38522108,930

Bromate		26100,7441697,215

Chlorate		1161,87235234,707

Benzene		18,00018,000

Thallium		39903990

Tetrachloroethylene (perchloroethylene)		23192319

Trichloroethylene		155155

Contaminants found in Wyoming above legal limits

Contaminant# of UtilitiesPeople Served

Total trihalomethanes (TTHMs)		12,000

Radium, combined (-226 & -228)		2219

Nitrate and nitrite		170

Uranium		152