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EWG's Tap Water Database

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Wyoming

  • 314 Utilities

  • Serving: 460,000

  • Data available: 2010-2015

  • Contaminants Found: 53

 

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

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, WY57,500
City of EvanstonEvanston, WY12,000
City of GilletteGillette, WY30,121
City of Green RiverGreen River, WY10,500
City of LaramieLaramie, WY28,000
City of RivertonRiverton, WY10,001
City of Rock SpringsRock Springs, WY19,050
City of SheridanSheridan, WY15,500
South Cheyenne Water and Sewer DistrictCheyenne, WY10,000

Utilities that accumulated/accrued the most violation points as of October 2014 to September 2017 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
Manville, Town OfManville, WY97102
Bennor Estates & Improvement DistrictGillette, WY17465
Little America Hotels & Resorts, Inc- WyLittle America, WY2,00056
Southfork Estates I & SDGillette, WY13830
Owl Creek Water DistrictThermopolis, WY6030
Lance Creek Water DistrictLance Creek, WY4527
Sweetwater Improvement & Service DistricNewcastle, WY4624
Jeffrey City Water & Sewer DistrictJeffrey City, WY4016
Snake River Mobile Home ParkJackson, WY6511
Wamsutter, Town OfWamsutter, WY45011
Bear River Regional Joint PowersBear River, WY1,20010
Wheatland, Town OfWheatland, WY3,62710
Mountain Village Park IncorporatedBig Piney, WY1508
Farson Mobile Home CourtRock Springs, WY467
Big Piney, Town OfBig Piney, WY5526
Bar Y Estates/west Gros Ventre Butte WaterTeton Village, WY2706
Lakeview Mobile Home ParkGillette, WY366
Moorcroft, Town OfGillette, WY8076
Marbleton, Town OfMarbleton, WY1,0946
Hudson, Town OfRiverton, WY4606
Cokeville, Town OfCokeville, WY5356
Leisure Valley Inc/ Star Valley Rv ParkThayne, WY4336
Star Valley Ranch, Town OfStar Valley Ranch, WY2,0006
Hoy Mobile Home ParkGillette, WY1006
Rawlins Water Supply, City OfRawlins, WY9,7496
Etna Water & Sewer DistrictEtna, WY1206
Fort Laramie, Town OfFort Laramie, WY2105
Centennial Water and SewerLaramie, WY1005
Cowley, Town OfCowley, WY5735
Pavillion, Town OfPavillion, WY2305

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

Contaminants found in Wyoming above health guidelines

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

Total trihalomethanes (TTHMs)
131387,540137398,526

Radium-228
215369,000226399,005

Radium-226
177346,887185349,892

Bromodichloromethane
119314,682120315,619

Chloroform
109299,260116304,732

Dichloroacetic acid
102293,373103293,720

Uranium
112289,940127316,870

Dibromochloromethane
96256,939103266,849

Chromium (hexavalent)
45251,03446261,035

Trichloroacetic acid
88244,92490255,020

Bromate
26128,76526128,765

Chlorate
1161,06535226,163

Arsenic
1323,4441323,444

Nitrate and nitrite
97,257201260,834

Bromoform
64,88760197,048

Thallium
18301830

Tetrachloroethylene (perchloroethylene)
14001400

Contaminants found in Wyoming above legal limits

Contaminant# of UtilitiesPeople Served

Total trihalomethanes (TTHMs)
12,000

Radium, combined (-226 & -228)
3357

Arsenic
1150

Uranium
197