U.S. water systems

Colorado Water Systems

Colorado

1,750 community water systems on record — 1,058 active, 692 inactive.

Every active community water system nationwide must produce a Consumer Confidence Report under the EPA's revised rule, effective for reports due July 1, 2027.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Colorado’s official records. Always confirm current status with Colorado before making decisions based on this information.

Counties in Colorado

Adams County (91)Alamosa County (9)Arapahoe County (73)Archuleta County (17)Baca County (6)Bent County (7)Boulder County (73)Broomfield County (3)Chaffee County (25)Cheyenne County (3)Clear Creek County (13)Conejos County (10)Costilla County (10)Crowley County (13)Custer County (4)Delta County (39)Denver County (20)Dolores County (2)Douglas County (36)Eagle County (52)El Paso County (119)Elbert County (15)Fremont County (25)Garfield County (82)Gilpin County (2)Grand County (27)Gunnison County (35)Hinsdale County (3)Huerfano County (15)Jackson County (2)Jefferson County (96)Kiowa County (4)Kit Carson County (7)La Plata County (82)Lake County (17)Larimer County (69)Las Animas County (19)Lincoln County (7)Logan County (19)Mesa County (38)Mineral County (3)Moffat County (9)Montezuma County (15)Montrose County (31)Morgan County (13)Otero County (29)Ouray County (8)Park County (12)Phillips County (3)Pitkin County (35)Prowers County (11)Pueblo County (39)Rio Blanco County (6)Rio Grande County (12)Routt County (29)Saguache County (10)San Juan County (1)San Miguel County (14)Sedgwick County (3)Summit County (37)Teller County (39)Washington County (2)Weld County (88)Yuma County (5)

All community water systems in Colorado

System name	Mailing city	Population served	Status
DENVER WATER BOARD	DENVER	1,287,000	Active
AURORA CITY OF	AURORA	533,407	Active
COLORADO SPRINGS UTILITIES	COLORADO SPRINGS	464,111	Active
THORNTON CITY OF	THORNTON	226,465	Active
WESTMINSTER CITY OF	WESTMINSTER	202,078	Active
COLO SPGS - CITY-PINE VLY PLNT	COLO SPGS	187,000	Inactive
FT COLLINS CITY OF	FORT COLLINS	179,901	Active
ARVADA CITY OF	ARVADA	171,610	Active
BOULDER CITY OF	BOULDER	166,080	Active
GREELEY CITY OF	GREELEY	132,310	Active
PUEBLO BOARD OF WW	PUEBLO	114,070	Active
CASTLE ROCK TOWN OF	CASTLE ROCK	110,298	Active
BROOMFIELD CITY AND COUNTY OF	BROOMFIELD	106,153	Active
LONGMONT CITY OF	LONGMONT	104,178	Active
HIGHLANDS RANCH WSD	HIGHLANDS RANCH	103,444	Active
UTE WCD	GRAND JUNCTION	92,580	Active
LOVELAND CITY OF	LOVELAND	91,077	Active
CONSOLIDATED MUTUAL MAPLE GROVE	LAKEWOOD	81,400	Active
PARKER WSD	PARKER	75,949	Active
SOUTH ADAMS COUNTY WSD	COMMERCE CITY	75,559	Active
EAST CHERRY CREEK VALLEY WSD	AURORA	66,130	Active
FT COLLINS LOVELAND WD	FORT COLLINS	63,532	Active
ENGLEWOOD CITY OF	ENGLEWOOD	57,332	Active
BRIGHTON CITY OF	BRIGHTON	56,304	Active
SOUTHGATE WSD	CENTENNIAL	55,000	Active
CONSOLIDATED MUTUAL WATER COMPANY	LAKEWOOD	54,669	Inactive
EAGLE RIVER WSD	VAIL	51,515	Active
GREEN MOUNTAIN WSD	LAKEWOOD	49,400	Active
NORTHGLENN CITY OF	NORTHGLENN	48,927	Active
SOUTHWEST METROPOLITAN WSD	LITTLETON	48,648	Active
US DEPARTMENT OF THE ARMY FORT CARSON	FORT CARSON	48,000	Active
ERIE TOWN OF	ERIE	47,444	Active
BANCROFT CLOVER WSD	LAKEWOOD	44,000	Active
GOLDEN CITY OF	GOLDEN	38,288	Active
CANON CITY CITY OF	CANON CITY	34,800	Active
CLIFTON WD	CLIFTON	34,500	Active
DURANGO CITY OF	DURANGO	33,787	Active
UPPER EAGLE REGIONAL WA	VAIL	32,831	Inactive
ASPEN CITY OF	ASPEN	31,100	Active
ARAPAHOE CNTY WWWA	CENTENNIAL	31,000	Active
BEAR CREEK WSD	LAKEWOOD	30,000	Active
PUEBLO WEST MD	PUEBLO WEST	30,000	Active
CHEROKEE MD	COLORADO SPRINGS	29,610	Active
LAFAYETTE CITY OF	LAFAYETTE	28,700	Active
BRECKENRIDGE TOWN OF	BRECKENRIDGE	28,315	Active
EAST LARIMER COUNTY WD	FORT COLLINS	27,944	Active
FIRESTONE TOWN OF	FIRESTONE	27,798	Active
WIDEFIELD WSD	COLORADO SPRINGS	27,640	Active
CSU MAIN AND WEST HOUSING CAMPUS	FORT COLLINS	27,375	Active
JOHNSTOWN TOWN OF	JOHNSTOWN	27,295	Active
GRAND JUNCTION CITY OF	GRAND JUNCTION	26,000	Active
LITTLE THOMPSON WD	BERTHOUD	25,654	Active
FOUNTAIN CITY OF	FOUNTAIN	25,130	Active
CRESTVIEW WSD	DENVER	23,756	Active
WINDSOR TOWN OF	WINDSOR	23,500	Active
MERIDIAN MD	ENGLEWOOD	23,415	Active
CHERRY CREEK VALLEY WSD	DENVER	22,000	Active
LOUISVILLE CITY OF	LOUISVILLE	20,975	Active
GREEN MTN PARK WTR & SAN DIST	LAKEWOOD	20,600	Inactive
TRI COUNTY WCD	MONTROSE	20,490	Active
LEFT HAND WD	NIWOT	20,280	Active
SECURITY WATER DISTRICT	COLORADO SPRINGS	20,000	Active
WHEAT RIDGE WATER DISTRICT	WHEAT RIDGE	20,000	Active
PLATTE CANYON WSD	LITTLETON	19,485	Active
EVANS CITY OF	EVANS	19,369	Active
MONTROSE CITY OF	MONTROSE	19,305	Active
MT WERNER WD	STEAMBOAT SPRINGS	19,000	Active
WILLOWS WD	CENTENNIAL	19,000	Active
WOODMOOR WSD	MONUMENT	18,031	Active
SUPERIOR MD NO 1	SUPERIOR	17,900	Active
FREDERICK TOWN OF	FREDERICK	17,173	Active
US AIR FORCE ACADEMY	USAF ACADEMY	16,876	Active
ESTES PARK TOWN OF	ESTES PARK	16,722	Active
NORTH WELD COUNTY WD	LUCERNE	15,890	Active
EVERGREEN MD	EVERGREEN	15,750	Active
STONEGATE MD	PARKER	15,295	Active
GYPSUM TOWN OF	GYPSUM	15,272	Active
BANCROFT WTR & SAN DIST	DENVER	15,200	Inactive
BLACK HAWK CITY OF	BLACK HAWK	15,167	Active
STERLING CITY OF	STERLING	15,100	Active
NORTH WASHINGTON STREET WSD	DENVER	14,500	Active
WHEAT RIDGE WTR DIST	WHEAT RIDGE	14,400	Inactive
BERTHOUD TOWN OF	BERTHOUD	14,211	Active
WOODMEN HILLS MD	FALCON	13,888	Active
MONTEZUMA WC	DOLORES	13,797	Active
ROXBOROUGH WSD	LITTLETON	13,765	Active
PINERY WWD	PARKER	12,901	Active
CASTLE PINES NORTH MD	CASTLE PINES	12,800	Active
MERIDIAN SERVICE MD	PEYTON	12,760	Active
FT LUPTON CITY OF	FORT LUPTON	12,099	Active
FT MORGAN CITY OF	FORT MORGAN	12,000	Active
KEN CARYL WSD	LITTLETON	12,000	Active
LAKEHURST WSD	LITTLETON	12,000	Active
SEVERANCE TOWN OF	SEVERANCE	11,733	Active
WELLINGTON TOWN OF	WELLINGTON	11,720	Active
FEDERAL HEIGHTS CITY OF	FEDERAL HEIGHTS	11,678	Active
STERLING RANCH CAB	LITTLETON	11,501	Active
TRINIDAD CITY OF	TRINIDAD	11,400	Active
ALAMOSA CITY OF	ALAMOSA	11,271	Active
PAGOSA AREA WSD	PAGOSA SPRINGS	11,069	Active
COTTONWOOD WSD	ENGLEWOOD	10,867	Active
IDAHO SPRINGS CITY OF	IDAHO SPRINGS	10,432	Active
NORTH TABLE MOUNTAIN WSD	GOLDEN	10,000	Active
VALLEY WD	WHEAT RIDGE	10,000	Active
STEAMBOAT SPRINGS CITY OF	STEAMBOAT SPRINGS	9,950	Active
SNAKE RIVER WD	KEYSTONE	9,900	Active
MORRISON TOWN OF	MORRISON	9,887	Active
MOUNTAIN VILLAGE TOWN OF	REDVALE	9,700	Active
ST CHARLES MESA WD	PUEBLO	9,690	Active
GUNNISON CITY OF	GUNNISON	9,610	Active
RIFLE CITY OF	RIFLE	9,489	Active
GLENWOOD SPRINGS CITY OF	GLENWOOD SPRINGS	9,428	Active
WILLOWBROOK WSD	LAKEWOOD	9,348	Active
CHERRY CREEK VILLAGE WD	GREENWOOD VILLAGE	9,215	Active
MILLIKEN TOWN OF	MILLIKEN	9,200	Active
NORTH WASHINGTON W&S DIST	BROOMFIELD	9,000	Inactive
CRAIG CITY OF	CRAIG	8,930	Active
CORTEZ CITY OF	CORTEZ	8,770	Active
DELTA CITY OF	DELTA	8,700	Active
WOODLAND PARK CITY OF	WOODLAND	8,500	Active
SILVERTHORNE TOWN OF	SILVERTHORNE	8,400	Active
LA JUNTA CITY OF	LA JUNTA	8,320	Active
INVERNESS WSD	ENGLEWOOD	8,140	Active
MORGAN COUNTY QUALITY WD	FORT MORGAN	8,116	Active
TELLURIDE TOWN OF	TELLURIDE	7,900	Active
CENTRAL WELD CNTY WD	GREELEY	7,662	Active
EAGLE TOWN OF	EAGLE	7,511	Active
FLORENCE CITY OF	FLORENCE	7,500	Active
LAMAR CITY OF	LAMAR	7,500	Active
NORTH TABLE MTN W&S DIST	GOLDEN	7,500	Inactive
PARKVILLE WD	LEADVILLE	7,500	Active
TODD CREEK VILLAGE MD	BRIGHTON	7,363	Active
EATON TOWN OF	EATON	7,328	Active
MANITOU SPRINGS CITY OF	MANITOU SPRINGS	6,938	Active
DACONO CITY OF	DACONO	6,900	Active
CARBONDALE TOWN OF	CARBONDALE	6,700	Active
WINTER PARK WSD	WINTER PARK	6,635	Active
LOCHBUIE TOWN OF	LOCHBUIE	6,518	Active
BOULDER VALLEY WTR & SAN DIST	BOULDER	6,500	Inactive
STRATMOOR HILLS WSD	COLORADO SPRINGS	6,500	Active
DONALA WSD	COLORADO SPRINGS	6,421	Active
CLOVER WTR & SAN DIST	DENVER	6,400	Inactive
SNOWMASS VILLAGE WSD	SNOWMASS VILLAGE	6,353	Active
NORTHERN DOUGLAS COUNTY WSD	GREENWOOD VILLAGE	6,160	Active
LAKEWOOD CITY OF	LAKEWOOD	6,000	Active
COPPER MOUNTAIN CONSOLIDATED MD	COPPER MOUNTAIN	5,785	Active
MONUMENT TOWN OF	MONUMENT	5,740	Active
TRIVIEW MD	MONUMENT	5,737	Active
SALIDA CITY OF	SALIDA	5,666	Active
CASTLE PINES VILLAGE MD	CASTLE ROCK	5,656	Active
GRAND COUNTY WATER NO 1	WINTER PARK	5,400	Active
GEORGETOWN TOWN OF	GEORGETOWN	5,315	Active
EDGEWATER CITY OF	EDGEWATER	5,300	Active
BRUSH CITY OF	HILLROSE	5,122	Active
LIMON TOWN OF	LIMON	5,080	Active
NEW CASTLE TOWN OF	NEW CASTLE	5,024	Active
PAINT BRUSH HILLS	FALCON	4,994	Active
LAKEHURST WTR & SAN DIST	LITTLETON	4,850	Inactive
NORTHERN COLORADO WA	WELLINGTON	4,675	Active
KEENESBURG TOWN OF	KEENESBURG	4,650	Active
EDGEWATER - CITY OF	EDGEWATER	4,600	Inactive
MONTE VISTA CITY OF	MONTE VISTA	4,600	Active
MID VALLEY MD	CARBONDALE	4,588	Active
ELIZABETH TOWN OF	ELIZABETH	4,523	Active
MENOKEN WD	MONTROSE	4,500	Active
SABLE WTR DIST	AURORA	4,500	Inactive
FRISCO TOWN OF	FRISCO	4,495	Active
ROCKY FORD CITY OF	ROCKY FORD	4,443	Active
BENNETT TOWN OF	BENNETT	4,400	Active
GLENDALE CITY OF	GLENDALE	4,400	Active
AULT TOWN OF	AULT	4,220	Active
BATTLEMENT MESA MD	PARACHUTE	4,100	Active
YUMA CITY OF	YUMA	4,049	Active
FORT COLLINS NORTH WELLINGTON KOA	—	4,026	Inactive
COLO SPGS VII - SKYWAY	COLO SPGS	4,000	Inactive
HIGH VIEW WD	DENVER	4,000	Active
PARK CENTER WD	CANON CITY	4,000	Active
WEST FORT COLLINS WD	LA PORTE	4,000	Active
HAYDEN TOWN OF	HAYDEN	3,982	Active
GENESEE WSD	GOLDEN	3,920	Active
PERRY PARK WSD	LARKSPUR	3,890	Active
CHIPETA WD	MONTROSE	3,802	Active
BUENA VISTA TOWN OF	BUENA VISTA	3,776	Active
CENTRAL CITY CITY OF	CENTRAL CITY	3,750	Active
YMCA ROCKIES WIND RIVER	ESTES PARK	3,730	Active
BURLINGTON CITY OF	BURLINGTON	3,720	Active
COLORADO CENTRE MD	COLORADO SPRINGS	3,675	Active
SILT TOWN OF	SILT	3,536	Active
GREENWOOD VILLAGE	ENGLEWOOD	3,500	Inactive
MONTEZUMA WTR CO	DOLORES	3,500	Inactive
PLEASANT VIEW WTR & SAN DIST	GOLDEN	3,500	Inactive
ADVENIR FRENCH QUARTER	DENVER	3,447	Active
HUDSON TOWN OF	HUDSON	3,350	Active
MOUNT CRESTED BUTTE WSD	MT CRESTED BUTTE	3,296	Active
MEADOWBROOK WD	LAKEWOOD	3,290	Active
DILLON TOWN OF	DILLON	3,254	Active
WINTER PARK RANCH WSD	FRASER	3,250	Active
WALSENBURG CITY OF	WALSENBURG	3,230	Active
LONGS PEAK WD	LONGMONT	3,200	Active
PENROSE WD	PENROSE	3,149	Active

Showing the 200 largest of 1,750 systems on record, by population served. Browse by county above for the full list — every system has its own page, and all of them are in the sitemap.