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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 January to March 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, WY97101
Bennor Estates & Improvement DistrictGillette, WY17470
Little America Hotels & Resorts, Inc- WyLittle America, WY2,00051
Southfork Estates I & SDGillette, WY13835
Owl Creek Water DistrictThermopolis, WY6025
Lusk, Town OfLusk, WY1,50020
Sweetwater Improvement & Service DistricNewcastle, WY4618
Mountain Village Park IncorporatedBig Piney, WY15014
Wheatland, Town OfWheatland, WY3,62710
Lance Creek Water DistrictLance Creek, WY4510
Jeffrey City Water & Sewer DistrictJeffrey City, WY409
Snake River Mobile Home ParkJackson, WY658
Etna Water & Sewer DistrictEtna, WY1206
Farson Mobile Home CourtRock Springs, WY466
Hudson, Town OfRiverton, WY4606
Rawlins Water Supply, City OfRawlins, WY9,7496
Yellowstone Np Old FaithfulYellowstone National Park, WY1505
Wamsutter, Town OfWamsutter, WY4505
Hyattville Service & Improvement DistrictHyattville, WY664
Evergreen Properties, LlcCheyenne, WY504
High Plains RanchCheyenne, WY504
Granger, Town OfGranger, WY1353
Alcova Dam Trailer ParkCasper, WY453
Lakeview Improvement & Service DistrictMills, WY503
Rafter J Subdivision Ho AssociationAlpine, WY1,5003
Clearview Improvement ServiceRock Springs, WY1,0002
Rivermeadows Water DistrictJackson, WY1002
Ridgewater Improvement Distr.Douglas, WY3002
Jackson, Town OfJackson, WY8,0002
Lucerne Water and Sewer DistrictThermopolis, WY3002

Large utilities that accumulated/accrued the most violation points as of January to March 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
216369,100227399,105

Radium-226
178346,987186349,992

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)
61,858

Arsenic
1150

Uranium
197