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EWG's Tap Water Database

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Colorado

  • 876 Utilities

  • Serving: 5,591,000

  • Data available: 2010-2015

  • Contaminants Found: 97

 

EWG's drinking water quality report for Colorado shows results of tests conducted by the water utilities in Colorado and provided to EWG by the Colorado Department of Public Health & Environment.

LARGE UTILITIES
ALL UTILITIES WITH VIOLATIONS
LARGE UTILITIES WITH VIOLATIONS

Below are utilities in Colorado serving over 10,000 people, listed alphabetically. Click the "more" button below to get the full list of utilities serving over 10,000 people.

Large utilities in Colorado

UtilityLocationPeople
Served
Arapahoe Cnty WwwaCentennial, CO31,000
Bancroft Clover WSDLakewood, CO50,000
Bear Creek WSDLakewood, CO31,150
Canon CityCanon City, CO34,800
Castle RockCastle Rock, CO54,826
Centennial Water and Sanitation DistrictHighlands Ranch, CO88,042
Cherokee MDColorado Springs, CO20,600
Cherry Creek Valley WSDDenver, CO15,400
City and County of BroomfieldBroomfield, CO87,104
City of ArvadaArvada, CO107,161
City of AspenAspen, CO31,100
City of AuroraAurora, CO314,346
City of Black HawkBlack Hawk, CO15,167
City of BoulderBoulder, CO166,080
City of BrightonBrighton, CO32,700
City of DurangoDurango, CO23,069
City of EnglewoodEnglewood, CO46,541
City of EvansEvans, CO19,369
City of Federal HeightsFederal Heights, CO11,678
City of Fort CollinsFort Collins, CO129,100
City of FountainFountain, CO21,000
City of Ft MorganFort Morgan, CO12,000
City of GoldenGolden, CO28,232
City of GreeleyGreeley, CO91,109
City of LafayetteLafayette, CO27,651
City of LongmontLongmont, CO87,850
City of LouisvilleLouisville, CO19,500
City of LovelandLoveland, CO71,985
City of MontroseMontrose, CO17,000
City of NorthglennNorthglenn, CO35,357
More

Utilities that accumulated/accrued the most violation points as of January to March 2017 in Colorado

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
Burlington, City ofBurlington, CO4,250150
Sun Meadow EstatesGlenwood Springs, CO49111
Riverside Water CompanyRocky Ford, CO9072
Brighton Mobile Home ParkLittleton, CO7771
Rye, Town ofRye, CO24456
Asgard Subdivision WaSilt, CO8055
Alpine Village LLCColorado Springs, CO8055
Signal Mountain Ranch Property Owners Water CompanyBeulah, CO6646
Manzanola, Town ofManzanola, CO49745
Highland Lakes Water DistrictDivide, CO87540
Ute Heights Community WsSalida, CO5040
Beehive Water Company No. 1Cheraw, CO15435
Red Rock Valley Water DistrictColorado Springs, CO20034
Youtsey Water CompanyBoone, CO733
Cheraw, Town ofCheraw, CO25430
Hidden Valley Mutual Water CompanyLittleton, CO15530
Fayette Water CompanyManzanola, CO7528
Pagels TpFt Morgan, CO30027
Valley Water CompanyManzanola, CO27027
Patterson Valley Water CompanyRocky Ford, CO12027
Vroman Water CompanyManzanola, CO12527
North Holbrook Water CompanyRocky Ford, CO7526
South Swink Water CompanyLa Junta, CO60025
May Valley WaWiley, CO1,50025
Somerset, Town ofSomerset, CO10025
Eureka Water CompanySwink, CO49825
Genoa, Town ofGenoa, CO13924
Rainbow Valley Water DistrictDivide, CO11522
Merino, Town ofMerino, CO23521
Sheridan Lake Water CompanySheridan Lake, CO8021

Large utilities that accumulated/accrued the most violation points as of January to March 2017 in Colorado

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 TrinidadTrinidad, CO11,4006
Wheat Ridge Water DistrictWheat Ridge, CO24,0005
Widefield WSDColorado Springs, CO19,0005
Consolidated Mutual Maple GroveLakewood, CO30,8553
US Air Force AcademyUsaf Academy, CO16,8763
Upper Eagle Regional WAVail, CO31,5813
Cherokee MDColorado Springs, CO20,6002
City of EvansEvans, CO19,3692
Denver Water BoardDenver, CO1,000,0001
City of Black HawkBlack Hawk, CO15,1671
City of FountainFountain, CO21,0001

Contaminants found in Colorado above health guidelines

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

Total trihalomethanes (TTHMs)
5815,496,1675945,512,004

Chromium (hexavalent)
1563,848,0771894,915,700

Radium-228
3823,844,8933853,845,852

Bromodichloromethane
4423,409,3194493,423,119

Chloroform
3613,167,3114063,390,149

Radium-226
4482,529,3364783,168,490

Uranium
3671,704,2344634,017,992

Dichloroacetic acid
2821,468,7662901,517,259

Trichloroacetic acid
2581,435,3062591,443,780

Chlorite
401,024,055431,042,327

Dibromochloromethane
283994,6033672,841,397

Chlorate
17547,2831363,196,532

Radon
14261,57914261,579

Arsenic
70215,44670215,446

Bromoform
67190,318201651,365

Tetrachloroethylene (perchloroethylene)
9113,8609113,860

1,4-Dioxane
483,01820673,295

Nitrate
3774,3816554,674,190

Perfluoroheptanoic acid (PFHPA)
661,907661,907

Perfluorohexane sulfonate (PFHXS)
661,907661,907

Perfluorooctanoic acid (PFOA)
661,907661,907

Perfluorooctane sulfonate (PFOS)
661,907661,907

Bromate
632,281632,281

Thallium
630,9081054,396

Vinyl chloride
226,250226,250

Cadmium
524,599524,599

Perfluorobutane sulfonate (PFBS)
119,000119,000

Carbon tetrachloride
18,39018,390

Antimony
42,658421,485,912

Selenium
21,280111826,090

Barium
18503694,809,895

Aluminum
15251525

Manganese
152555,130

Benzene
13831383

Nitrate and nitrite
22371642,784,817

1,2,3-Trichloropropane
22292229

Chloromethane
1601110,312

Contaminants found in Colorado above legal limits

Contaminant# of UtilitiesPeople Served

Radium, combined (-226 & -228)
225,829

Nitrate
24,311

Uranium
71,664

Total trihalomethanes (TTHMs)
3234