Tapcensus

Colorado

Adams County drinking water quality

89 active public water systems serve 713,420 people in Adams County. 49 are compliant, 40 had at least one EPA violation in the past three years, 2 are designated serious violators, and 4 carry a health flag.

Active systems 89 64 community systems
People served 713K by public water systems
Systems with violations 40 45% of active systems, past 3 years
Serious violators 2 4 systems carry a health flag

Needs attention

Friendly Village of the Rockies CO0101283 · Community water system · Serves 1,046 4 rules violated in the past three years. Unresolved: Consumer Confidence Rule (CCR), Groundwater Rule (GWR), and Public Notification Rule.
Galambs Mobile Home and RV Park CO0101060 · Community water system · Serves 130 6 rules violated in the past three years. Unresolved: Consumer Confidence Rule (CCR), Public Notification Rule, and Revised Total Coliform Rule (RTCR).
Wikiup MHP CO0101180 · Community water system · Serves 2,500 2 rules violated in the past three years. Unresolved: Groundwater Rule (GWR) and Public Notification Rule.
Advance MHP CO0101104 · Community water system · Serves 175 2 rules violated in the past three years. Unresolved: Lead and Copper Rule Revisions (LCRR) and Public Notification Rule.
North Washington Wua CO0101110 · Community water system · Serves 90 6 rules violated in the past three years. Unresolved: Groundwater Rule (GWR), Lead and Copper Rule (LCR), Public Notification Rule, Revised Total Coliform Rule (RTCR), and Stage 1 Disinfectants and DBP Rule.

Community water systems

64 systems, largest first
SystemServesStatusRules violated, 3 yrUnresolved
Thornton City of
 226,465 2 0
Westminster City of
 202,078 1 0
South Adams County Wsd
 75,559 0 0
Brighton City of
 56,304 0 0
Northglenn City of
 48,927 0 0
Crestview Wsd
 23,756 0 0
North Washington Street Wsd
 14,500 0 0
Federal Heights City of
 11,678 0 0
Todd Creek Village MD
 7,363 0 0
Bennett Town of
 4,400 2 0
North Pecos Wsd
 2,500 0 0
Wikiup MHP
 2,500 2 1
Eastern Adams CO MD
 2,485 0 0
Strasburg Wsd
 2,050 3 0
Kimberly Hills MHP
 2,005 3 0
Pine Lakes Ranch
 1,905 0 0
Friendly Village of Aurora MHP
 1,786 0 0
Woodland Hills MHC
Thornton 		1,740 0 0
Hillcrest Village MHP
 1,505 1 0
Eastgate Village Manufactured Homes
 1,500 0 0
Redwood Estates
Thornton 		1,500 0 0
The Grove at Alta Ridge
Thornton 		1,300 0 0
Greatrock North Wsd
 1,250 0 0
Denver Cascade MHP
 1,200 2 0
Holiday Hills Village
 1,190 0 0
Casa Estates MHP
 1,117 2 0
Friendly Village of the Rockies
 1,046 4 3
Countryside Village of Denver
 863 0 0
Mile High WC
 700 4 0
Lamplighter MHP
 651 1 0
Franklin Mobile Home Park
 513 4 0
Belleview Christian College
 460 3 0
Avilla Eastlake
Thornton 		410 6 1
HI Land Acres Wsd
 350 0 0
Green Acres MHP
 325 0 0
Mountain View Wua
 320 3 0
Chaparral Village MHP
Thornton 		303 1 0
Thornton Estates
Thornton 		300 1 0
Cavanaugh Hills WS
 286 1 0
Hazeltine Heights Water
 261 0 0
Garden Meadows
Denver 		250 0 0
Pioneer Mobile Home Park
 250 1 0
Mile High Mobile Home Park
 209 3 0
Riverdale Peaks II MD
 209 0 0
Barr Lake Rvp
 204 0 0
High Plains Wua
 200 0 0
Advance MHP
 175 2 1
Prairie View Poa
 175 2 0
Shady Lane MHP
 165 1 0
Creekside South Estates Metro District
 160 4 0
Non-community systems (25: schools, campgrounds, workplaces, restaurants)

These systems serve places people visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Adams County Parks
 868 3 1
Barr Lake State Park
 609 0 0
Watkins Square
 515 2 0
Elmwood Baptist Academy School
 450 0 0
Mountain View Fellowship
 447 0 0
Johnson Auto Plaza
 247 0 0
Buffalo Run Golf Course
 240 1 0
Flatrock Training Center WS
 204 0 0
Wagon Wheel Skating Rink
 153 0 0
Hideaway Steakhouse
 150 0 0
Colorado Air and Space Port
 140 0 0
Copeland Enterprises, Inc.
Watkins 		104 0 0
Sunmart 525
 100 0 0
Rocky Mountain Rail Park
Watkins 		65 0 0
Riverdale Animal Shelter
 62 0 0
Lulus Inn
 57 0 0
Northglenn Moose Lodge NO2166
 55 1 1
Colorado Rifle Club
Brighton 		50 0 0
Colorado Interstate Gas Watkins
 45 0 0
Joseph T Ryerson and Son INC
 44 0 0
Petrocco Farms
 42 0 0
BP Wattenberg Gas Plant
 41 0 0
Country Manor Motel
 37 1 0
E-470 Water System Plaza D
 25 5 0
City of Aurora at Front Range Airport
 0 0 0
Inactive systems (100, no longer operating or reporting)

Kept for the record and excluded from the county totals above. Browse inactive systems.

About this data

Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Colorado records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.