Colorado tap water quality
1,108 community water systems
4.8%
exceed lead action level
(51/1064 systems)
(51/1064 systems)
9.5%
PFOA/PFOS detected
(15/158 systems)
(15/158 systems)
Largest water systems
Lead is the LCR 90th-percentile result; a value above 0.015 mg/L exceeds the
EPA action level. “—” means no lead sample is on file for that system.
| System | City | Population | Lead (p90) |
|---|---|---|---|
| DENVER WATER BOARD | 1,287,000 | 0.0130 mg/L | |
| AURORA CITY OF | 533,407 | 0.0070 mg/L | |
| COLORADO SPRINGS UTILITIES | 464,111 | 0.0067 mg/L | |
| THORNTON CITY OF | 226,465 | 0.0054 mg/L | |
| WESTMINSTER CITY OF | 202,078 | 0.0090 mg/L | |
| FT COLLINS CITY OF | 179,901 | 0.0040 mg/L | |
| ARVADA CITY OF | 171,610 | 0.0105 mg/L | |
| BOULDER CITY OF | 166,080 | 0.0088 mg/L | |
| GREELEY CITY OF | 132,310 | 0.0066 mg/L | |
| PUEBLO BOARD OF WW | 114,070 | 0.0110 mg/L | |
| CASTLE ROCK TOWN OF | 110,298 | 0.0050 mg/L | |
| BROOMFIELD CITY AND COUNTY OF | BROOMFIELD | 106,153 | 0.0085 mg/L |
| LONGMONT CITY OF | 104,178 | 0.0050 mg/L | |
| HIGHLANDS RANCH WSD | 103,444 | 0.0068 mg/L | |
| UTE WCD | 92,580 | 0.0070 mg/L | |
| LOVELAND CITY OF | 91,077 | 0.0053 mg/L | |
| CONSOLIDATED MUTUAL MAPLE GROVE | 81,400 | 0.0124 mg/L | |
| PARKER WSD | 75,949 | 0.0064 mg/L | |
| SOUTH ADAMS COUNTY WSD | 75,559 | 0.0100 mg/L | |
| EAST CHERRY CREEK VALLEY WSD | 66,130 | 0.0050 mg/L | |
| FT COLLINS LOVELAND WD | 63,532 | 0.0067 mg/L | |
| ENGLEWOOD CITY OF | 57,332 | 0.0051 mg/L | |
| BRIGHTON CITY OF | 56,304 | 0.0123 mg/L | |
| SOUTHGATE WSD | 55,000 | 0.0090 mg/L | |
| EAGLE RIVER WSD | 51,515 | 0.0072 mg/L | |
| GREEN MOUNTAIN WSD | 49,400 | 0.0090 mg/L | |
| NORTHGLENN CITY OF | 48,927 | 0.0050 mg/L | |
| SOUTHWEST METROPOLITAN WSD | 48,648 | 0.0090 mg/L | |
| US DEPARTMENT OF THE ARMY FORT CARSON | 48,000 | 0.0082 mg/L | |
| ERIE TOWN OF | 47,444 | 0.0099 mg/L | |
| BANCROFT CLOVER WSD | 44,000 | 0.0090 mg/L | |
| GOLDEN CITY OF | 38,288 | 0.0050 mg/L | |
| CANON CITY CITY OF | 34,800 | 0.0050 mg/L | |
| CLIFTON WD | 34,500 | 0.0050 mg/L | |
| DURANGO CITY OF | 33,787 | 0.0060 mg/L | |
| ASPEN CITY OF | 31,100 | 0.0050 mg/L | |
| ARAPAHOE CNTY WWWA | 31,000 | 0.0170 mg/L | |
| PUEBLO WEST MD | 30,000 | 0.0025 mg/L | |
| BEAR CREEK WSD | 30,000 | 0.0090 mg/L | |
| CHEROKEE MD | 29,610 | 0.0070 mg/L | |
| LAFAYETTE CITY OF | 28,700 | 0.0062 mg/L | |
| BRECKENRIDGE TOWN OF | 28,315 | 0.0052 mg/L | |
| EAST LARIMER COUNTY WD | 27,944 | 0.0069 mg/L | |
| FIRESTONE TOWN OF | 27,798 | 0.0184 mg/L | |
| WIDEFIELD WSD | 27,640 | 0.0058 mg/L | |
| CSU MAIN AND WEST HOUSING CAMPUS | 27,375 | 0.0051 mg/L | |
| JOHNSTOWN TOWN OF | 27,295 | 0.0040 mg/L | |
| GRAND JUNCTION CITY OF | 26,000 | 0.0103 mg/L | |
| LITTLE THOMPSON WD | 25,654 | 0.0097 mg/L | |
| FOUNTAIN CITY OF | 25,130 | 0.0082 mg/L | |
| CRESTVIEW WSD | 23,756 | 0.0110 mg/L | |
| WINDSOR TOWN OF | 23,500 | 0.0071 mg/L | |
| MERIDIAN MD | 23,415 | 0.0044 mg/L | |
| CHERRY CREEK VALLEY WSD | 22,000 | 0.0090 mg/L | |
| LOUISVILLE CITY OF | 20,975 | 0.0046 mg/L | |
| TRI COUNTY WCD | 20,490 | 0.0090 mg/L | |
| LEFT HAND WD | 20,280 | 0.0060 mg/L | |
| WHEAT RIDGE WATER DISTRICT | 20,000 | 0.0090 mg/L | |
| SECURITY WATER DISTRICT | 20,000 | 0.0045 mg/L | |
| PLATTE CANYON WSD | 19,485 | 0.0090 mg/L | |
| EVANS CITY OF | 19,369 | 0.0058 mg/L | |
| MONTROSE CITY OF | 19,305 | 0.0090 mg/L | |
| WILLOWS WD | 19,000 | 0.0143 mg/L | |
| MT WERNER WD | 19,000 | 0.0138 mg/L | |
| WOODMOOR WSD | 18,031 | 0.0060 mg/L | |
| SUPERIOR MD NO 1 | 17,900 | 0.0086 mg/L | |
| FREDERICK TOWN OF | 17,173 | 0.0127 mg/L | |
| US AIR FORCE ACADEMY | 16,876 | 0.0051 mg/L | |
| ESTES PARK TOWN OF | 16,722 | 0.0161 mg/L | |
| NORTH WELD COUNTY WD | 15,890 | 0.0070 mg/L | |
| EVERGREEN MD | 15,750 | 0.0116 mg/L | |
| STONEGATE MD | 15,295 | 0.0048 mg/L | |
| GYPSUM TOWN OF | 15,272 | 0.0038 mg/L | |
| BLACK HAWK CITY OF | 15,167 | 0.0228 mg/L | |
| STERLING CITY OF | 15,100 | 0.0080 mg/L | |
| NORTH WASHINGTON STREET WSD | 14,500 | 0.0088 mg/L | |
| BERTHOUD TOWN OF | 14,211 | 0.0150 mg/L | |
| WOODMEN HILLS MD | 13,888 | 0.0050 mg/L | |
| MONTEZUMA WC | 13,797 | 0.0090 mg/L | |
| ROXBOROUGH WSD | 13,765 | 0.0080 mg/L | |
| PINERY WWD | 12,901 | 0.0030 mg/L | |
| CASTLE PINES NORTH MD | 12,800 | 0.0052 mg/L | |
| MERIDIAN SERVICE MD | 12,760 | 0.0025 mg/L | |
| FT LUPTON CITY OF | 12,099 | 0.0290 mg/L | |
| FT MORGAN CITY OF | 12,000 | 0.0089 mg/L | |
| KEN CARYL WSD | 12,000 | — | |
| LAKEHURST WSD | 12,000 | 0.0090 mg/L | |
| SEVERANCE TOWN OF | 11,733 | 0.0031 mg/L | |
| WELLINGTON TOWN OF | 11,720 | 0.0080 mg/L | |
| FEDERAL HEIGHTS CITY OF | 11,678 | 0.0053 mg/L | |
| STERLING RANCH CAB | 11,501 | 0.0000 mg/L | |
| TRINIDAD CITY OF | 11,400 | 0.0053 mg/L | |
| ALAMOSA CITY OF | 11,271 | 0.0051 mg/L | |
| PAGOSA AREA WSD | 11,069 | 0.0042 mg/L | |
| COTTONWOOD WSD | 10,867 | 0.0057 mg/L | |
| IDAHO SPRINGS CITY OF | 10,432 | 0.0188 mg/L | |
| NORTH TABLE MOUNTAIN WSD | 10,000 | 0.0054 mg/L | |
| VALLEY WD | 10,000 | 0.0090 mg/L | |
| STEAMBOAT SPRINGS CITY OF | 9,950 | 0.0113 mg/L | |
| SNAKE RIVER WD | 9,900 | 0.0132 mg/L |