States / Colorado / Drinking Water
Drinking Water Systems in Colorado
1,058 community water systems serving about 7,193,844 people. 407 have a health-based violation on record since 2015, 42 of them unresolved.
SystemHealth-based violations (2015+)
PINEWOOD SPRINGS WD · Larimer County · 745 served · surface water100 (6 unresolved)
NORTH WASHINGTON WUA · Adams County · 90 served · groundwater15 (6 unresolved)
BAILEY WSD · Park County · 483 served · surface water6 (6 unresolved)
MANZANOLA TOWN OF · Otero County · 497 served · groundwater220 (4 unresolved)
COLORADO CITY MD · Pueblo County · 2,755 served · surface water142 (4 unresolved)
CREST MOBILE ESTATES MHP · El Paso County · 100 served · purchased groundwater8 (4 unresolved)
BIG ELK MEADOWS WA · Larimer County · 405 served · surface water32 (3 unresolved)
TWILIGHT WC · La Plata County · 78 served · groundwater15 (3 unresolved)
NORTH HOLBROOK WC · Otero County · 58 served · groundwater146 (2 unresolved)
WALSENBURG CITY OF · Huerfano County · 3,230 served · surface water111 (2 unresolved)
HASTY WATER AUTHORITY · Bent County · 244 served · groundwater81 (2 unresolved)
DIVIDE SOUTH · Teller County · 74 served · groundwater under surface influence77 (2 unresolved)
PALMER LAKE MOBILE HOME RANCH · El Paso County · 268 served · purchased groundwater65 (2 unresolved)
RED ROCK VALLEY WD · El Paso County · 200 served · groundwater under surface influence61 (2 unresolved)
VALLEY MAINT CORP NO 2 · Teller County · 55 served · groundwater under surface influence18 (2 unresolved)
GARDEN VALLEY · El Paso County · 900 served · groundwater17 (2 unresolved)
MOUNTAIN WSD · Jefferson County · 1,941 served · groundwater under surface influence9 (2 unresolved)
LAKE CITY TOWN OF · Hinsdale County · 587 served · groundwater9 (2 unresolved)
SWINK TOWN OF · Otero County · 660 served · groundwater6 (2 unresolved)
COUNTRYSIDE ESTATES PUEBLO · Pueblo County · 508 served · purchased surface water6 (2 unresolved)
MONUMENT MEADOW VILLAGE MHP · El Paso County · 250 served · purchased groundwater6 (2 unresolved)
VONA TOWN OF · Kit Carson County · 160 served · groundwater6 (2 unresolved)
SHADOW MOUNTAIN MOBILE HOME PARK · El Paso County · 132 served · purchased surface water6 (2 unresolved)
NUEVA VIDA MOBILE HOME PARK · Larimer County · 266 served · purchased surface water5 (2 unresolved)
MOUNTAIN SHADOWS MHP · El Paso County · 56 served · purchased groundwater5 (2 unresolved)
LAZY DAYS MHV · El Paso County · 51 served5 (2 unresolved)
NEWDALE GRAND VALLEY WC · Otero County · 458 served · groundwater4 (2 unresolved)
WIKIUP MHP · Adams County · 2,500 served · groundwater2 (2 unresolved)
LAS ANIMAS CITY OF · Bent County · 2,139 served · groundwater2 (2 unresolved)
FRIENDLY VILLAGE OF THE ROCKIES · Adams County · 1,046 served · purchased surface water2 (2 unresolved)
APPLE & CHERRY RIDGE VILLAGE · Larimer County · 350 served · purchased surface water2 (2 unresolved)
THE ASPENS MOBILE HOME VILLAGE · Eagle County · 318 served · purchased surface water2 (2 unresolved)
WOODLAND WEST WUA · Teller County · 250 served · groundwater2 (2 unresolved)
TRANQUIL ACRES WS · Teller County · 180 served · groundwater2 (2 unresolved)
ADVANCE MHP · Adams County · 175 served · purchased surface water2 (2 unresolved)
MEADOW VILLAGE MOBILE HOME PARK · Weld County · 150 served · purchased surface water2 (2 unresolved)
SHIRE MOBILE HOME PARK · Weld County · 150 served · purchased surface water2 (2 unresolved)
MEADOWLARK MOBILE HOME PARK · Larimer County · 125 served · purchased surface water2 (2 unresolved)
NEIGHBORS OF DREAMLAND MHP · Pueblo County · 115 served · purchased surface water2 (2 unresolved)
ESCALANTE VILLAGE · DURANGO · 62 served · purchased surface water2 (2 unresolved)
MESA MOBILE PARK · La Plata County · 30 served · purchased surface water2 (2 unresolved)
RIVIERE ESTATES · Rio Grande County · 211 served · groundwater1 (1 unresolved)
MAY VALLEY WA · Prowers County · 1,500 served · groundwater1367
BURLINGTON CITY OF · Kit Carson County · 3,720 served · groundwater562
VALLEY WC · Otero County · 270 served · groundwater534
SOUTH SWINK WATER AUTHORITY · Otero County · 622 served · groundwater456
BEEHIVE WATER ASSOCIATION · Otero County · 154 served · groundwater326
VROMAN WC · Otero County · 125 served · groundwater295
RYE TOWN OF · Pueblo County · 745 served · surface water292
EUREKA WC · Otero County · 498 served · groundwater290
PATTERSON VALLEY WC · Otero County · 96 served · groundwater278
FAYETTE WC · Otero County · 75 served · groundwater242
VALLEY MOBILE HOME LLC · Alamosa County · 85 served · groundwater239
SUN MEADOW ESTATES · Garfield County · 75 served · groundwater237
RIVERSIDE WC · Otero County · 90 served · groundwater225
CHERAW TOWN OF · Otero County · 254 served · groundwater203
EAST END WA · Otero County · 70 served · groundwater175
ELEPHANT ROCK MHP · El Paso County · 60 served · groundwater149
WEST GRAND VALLEY WA · Otero County · 100 served · groundwater135
HOLBROOK CENTER SOFT WA · Otero County · 54 served · groundwater120
PEAK VIEW PARK LLC · Teller County · 106 served · groundwater106
PAGELS TP · Morgan County · 300 served · groundwater99
HOLLY TOWN OF · Prowers County · 800 served · groundwater98
SOMERSET DOMESTIC WD · Gunnison County · 100 served · groundwater under surface influence97
SHERIDAN LAKE WD · Kiowa County · 148 served · groundwater94
PEETZ TOWN OF · Logan County · 295 served · groundwater92
PARADOX PIPELINE CO · Montrose County · 200 served · groundwater91
LOUVIERS WSD · Douglas County · 238 served · groundwater87
WALSH TOWN OF · Baca County · 650 served · groundwater86
ALPINE VILLAGE MHP · Teller County · 80 served · groundwater86
SIGNAL MOUNTAIN RANCH PROPERTY OWNERS WC · Pueblo County · 66 served · groundwater84
YMCA ROCKIES WIND RIVER · Larimer County · 3,730 served · purchased surface water83
HOMESTEAD WC · Jefferson County · 1,000 served · surface water81
ANNUNCIATION HEIGHTS · Larimer County · 260 served · groundwater77
COALBY DOMESTIC WC · Delta County · 239 served · groundwater under surface influence77
TELLURIDE PINES HOA · San Miguel County · 25 served · groundwater under surface influence77
LOOKOUT MOUNTAIN WD · Clear Creek County · 1,378 served · surface water64
PRITCHETT TOWN OF · Baca County · 125 served · groundwater61
SANS SOUCI COOPERATIVE · Boulder County · 150 served · groundwater under surface influence60
SHAMBHALA MOUNTAIN CENTER · Larimer County · 90 served · groundwater under surface influence60
PINE DRIVE WD · Pueblo County · 416 served · surface water59
LITTLE ELK CREEK · Pitkin County · 150 served · groundwater under surface influence59
FT LUPTON CITY OF · Weld County · 12,099 served · surface water56
BRIGHTON VILLAGE LLC · Adams County · 77 served · purchased surface water54
MILL CREEK WIA · Clear Creek County · 67 served · surface water54
UTE PASS WA INC · La Plata County · 120 served · surface water53
EMPIRE TOWN OF · Clear Creek County · 500 served · surface water52
MONUMENT TOWN OF · El Paso County · 5,740 served · groundwater49
UPPER SURFACE CREEK DOMESTIC WUA · Delta County · 2,800 served · surface water49
SOUTH SIDE WA · Otero County · 44 served · groundwater49
STUCKER MESA DOMESTIC WC · Delta County · 36 served · groundwater under surface influence48
JAMESTOWN TOWN OF · Boulder County · 280 served · surface water47
GRANADA TOWN OF · Prowers County · 515 served · groundwater46
GREELEY RV PARK · Weld County · 164 served · groundwater44
A AND B WA INC · Prowers County · 100 served · groundwater44
ASGARD SUBDIVISION WA · Garfield County · 80 served · purchased surface water44
TABLE MESA VILLAGE MHP · Boulder County · 75 served · groundwater under surface influence44
OAK CREEK TOWN OF · Routt County · 950 served · surface water43
DURANGO JCMHP, LLC · La Plata County · 100 served · groundwater under surface influence43
LAKE SANCHEZ ESTATES · Costilla County · 34 served · groundwater41
TELLURIDE TOWN OF · San Miguel County · 7,900 served · surface water40
OPHIR TOWN OF · San Miguel County · 193 served · surface water40
SOUTH FORK HEIGHTS APARTMENTS · Rio Grande County · 80 served · groundwater under surface influence40
TELLER COUNTY WSD · Teller County · 600 served · groundwater39
CREEKSIDE SOUTH ESTATES METRO DISTRICT · Adams County · 160 served · groundwater39
ANTONITO TOWN OF · Conejos County · 981 served · groundwater under surface influence38
GRANADA RURAL WATER AUTHORITY · Prowers County · 378 served · groundwater38
LARKSPUR TOWN OF · Douglas County · 275 served · groundwater38
GENOA TOWN OF · Lincoln County · 153 served · groundwater under surface influence37
RIVERVIEW CG · Larimer County · 450 served · surface water36
BEULAH WATER WORKS DISTRICT · Pueblo County · 445 served · surface water36
CATHEDRAL WC · Delta County · 200 served · groundwater under surface influence36
BRISTOL WSD · Prowers County · 151 served · groundwater35
PIONEER LOOKOUT WD · El Paso County · 120 served · groundwater33
LAKE DURANGO WA · La Plata County · 1,577 served · surface water32
MERINO TOWN OF · Logan County · 235 served · groundwater32
HIDDEN VALLEY WATER DISTRICT · Jefferson County · 155 served · purchased surface water32
NATURITA TOWN OF · Montrose County · 585 served · purchased surface water31
FLORISSANT WSD · Teller County · 250 served · groundwater under surface influence31
PACHECO TRAILER PARK · Rio Grande County · 36 served · groundwater31
TWO BUTTES TOWN OF · Baca County · 64 served · groundwater30
MT VERNON COUNTRY CLUB · Jefferson County · 734 served · groundwater under surface influence29
ST MARYS GLACIER WSD · Clear Creek County · 451 served · groundwater under surface influence29
FRUITLAND DOMESTIC WC · Montrose County · 335 served · surface water29
DURANGO FALFA MHC LLC · La Plata County · 40 served · groundwater under surface influence29
DOVE CREEK TOWN OF · Dolores County · 850 served · surface water28
BONE MESA DOMESTIC WD · Delta County · 400 served · groundwater under surface influence28
BAXTER WATER AND SERVICES · Pueblo County · 350 served · groundwater28
EDEN VALLEY INSTITUTE · Larimer County · 80 served · surface water27
VICTOR CITY OF · Teller County · 491 served · surface water26
DONALA WSD · El Paso County · 6,421 served · purchased surface water25
LA VETA TOWN OF · Huerfano County · 850 served · surface water25
TURKEY CANON RANCH WD · El Paso County · 138 served · groundwater25
GRAND COUNTY WATER NO 1 · Grand County · 5,400 served · surface water24
HARTMAN TOWN OF · Prowers County · 61 served · groundwater24
MUSTANG WATER AUTHORITY · Montrose County · 0 served · surface water24
INDIAN HILLS WD · Jefferson County · 1,300 served · groundwater under surface influence23
ECKLEY TOWN OF · Yuma County · 235 served · groundwater23
MOUNTAINDALE CG AND CABINS · Fremont County · 228 served · groundwater23
PHIPPSBURG TOWN OF · Routt County · 200 served · groundwater under surface influence23
MAD DOG WC · Delta County · 60 served · groundwater under surface influence23
ELBERT CREEK WATER CO · La Plata County · 750 served · surface water22
EVERGREEN LAKE COMPANY · Gunnison County · 431 served · surface water22
CUCHARAS SANITATION AND WATER DISTRICT · Huerfano County · 343 served · surface water22
WESTCREEK LAKES WD · Douglas County · 165 served · groundwater under surface influence22
PITKIN MESA PIPELINE CO · Delta County · 295 served · groundwater under surface influence21
PRAIRIE VIEW RANCH WD · Morgan County · 140 served · groundwater21
MT WERNER WD · Routt County · 19,000 served · surface water20
MCCLAVE WA INC · Bent County · 378 served · groundwater20
RED SKY RANCH · Eagle County · 291 served · surface water20
AGATE WA · Elbert County · 152 served · groundwater20
VILAS TOWN OF · Baca County · 137 served · groundwater20
RAINBOW VALLEY WD · Teller County · 130 served · surface water20
CRAGMONT WC · Jefferson County · 50 served · surface water20
ROLLING PLAINS ESTATE · Arapahoe County · 40 served · groundwater20
YAMPA TOWN OF · Routt County · 467 served · groundwater under surface influence19
FARMERS KORNER MHP · Summit County · 159 served · groundwater19
STEAMBOAT II MD · Routt County · 1,450 served · purchased surface water18
CHEYENNE WELLS TOWN OF · Cheyenne County · 840 served · groundwater18
ASPEN VILLAGE MD · Pitkin County · 300 served · groundwater under surface influence18
GALAMBS MOBILE HOME AND RV PARK · Adams County · 130 served · groundwater18
ELEVEN MILE RANCH ASSOCIATION · Park County · 72 served · surface water18
SPRINGFIELD TOWN OF · Baca County · 1,378 served · groundwater17
FOWLER TOWN OF · Otero County · 1,169 served · groundwater under surface influence17
MILE HI WATER INC HAULER · Boulder County · 1,000 served · purchased surface water16
RIDGWAY TOWN OF · Ouray County · 1,000 served · surface water16
FOREST VIEW ACRES WD · El Paso County · 772 served · surface water16
KIT CARSON TOWN OF · Cheyenne County · 326 served · groundwater16
SILVER PLUME TOWN OF · Clear Creek County · 180 served · surface water16
FREEMAN CREEK · La Plata County · 88 served · groundwater under surface influence16
BUFFALO CREEK WD · Jefferson County · 125 served · surface water15
TALL PINES VILLAGE · La Plata County · 60 served · groundwater under surface influence15
SUNRISE RANCH · Larimer County · 75 served · surface water14
TRES VALLES WEST · Huerfano County · 68 served · groundwater under surface influence14
GUADALUPE WA · Conejos County · 42 served · groundwater14
BOONE TOWN OF · Pueblo County · 263 served · groundwater13
ELEGANT HILLS MHP · Montezuma County · 170 served · purchased surface water13
BERTHOUD TOWN OF · Larimer County · 14,211 served · surface water12
WELLINGTON TOWN OF · Larimer County · 11,720 served · surface water12
PARK CENTER WD · Fremont County · 4,000 served · surface water12
PENROSE WD · Fremont County · 3,149 served · surface water12
PAONIA TOWN OF · Delta County · 2,499 served · groundwater under surface influence12
STRASBURG WSD · Adams County · 2,050 served · groundwater12
HOTCHKISS TOWN OF · Delta County · 2,050 served · surface water12
JULESBURG TOWN OF · Sedgwick County · 1,225 served · groundwater12
STRATTON TOWN OF · Kit Carson County · 960 served · groundwater12
DEBEQUE TOWN OF · Mesa County · 911 served · surface water12
HILLTOP WC · Otero County · 285 served · groundwater12
FLORIDA RIVER ESTATES HOA INC · La Plata County · 239 served · groundwater under surface influence12
KARVAL WATER USERS INC · Lincoln County · 102 served · groundwater12
PAOLI TOWN OF · Phillips County · 42 served · groundwater12
SAN ACACIO DOMESTIC WA · Costilla County · 40 served · groundwater12
NAVAJO RIVER RANCH POA · Archuleta County · 40 served · groundwater under surface influence12
PUEBLO WEST MD · Pueblo County · 30,000 served · surface water11
HIGHLAND LAKES WD · Teller County · 875 served · groundwater under surface influence11
SAN LAZARO MFCTD HOUSING COMMUNITY · Boulder County · 844 served · surface water11
VALLEY MAINT CORP NO 1 · Teller County · 470 served · groundwater11
ALLENSPARK WSD · Boulder County · 340 served · surface water11
MEADOW MTN WATER SUPPLY · Boulder County · 76 served · surface water11
LOUISVILLE CITY OF · Boulder County · 20,975 served · surface water10
DEUTSCH DOMESTIC WATER · Delta County · 246 served · groundwater10
FOREST GLEN SPORTS ASSOC INC · Teller County · 76 served · groundwater10
SHAWNEE WCA · Park County · 50 served · groundwater under surface influence10
AGUILAR TOWN OF · Las Animas County · 447 served · groundwater9
TRAVOIS HOA · Arapahoe County · 175 served · groundwater9
CAMPO TOWN OF · Baca County · 150 served · groundwater9
LIONS RIDGE ESTATES · Garfield County · 63 served · groundwater under surface influence9
BOULDER CITY OF · Boulder County · 166,080 served · surface water8
BROOMFIELD CITY AND COUNTY OF · BROOMFIELD · 106,153 served · surface water8
BRECKENRIDGE TOWN OF · Summit County · 28,315 served · surface water8
JOHNSTOWN TOWN OF · Weld County · 27,295 served · surface water8
SUPERIOR MD NO 1 · Boulder County · 17,900 served · surface water8
MANITOU SPRINGS CITY OF · El Paso County · 6,938 served · surface water8
CARBONDALE TOWN OF · Garfield County · 6,700 served · surface water8
KEENESBURG TOWN OF · Weld County · 4,650 served · groundwater8
HUDSON TOWN OF · Weld County · 3,350 served · purchased surface water8
FLAGLER TOWN OF · Kit Carson County · 2,160 served · groundwater8
KREMMLING TOWN OF · Grand County · 1,859 served · surface water8
DURANGO WEST MD NO 2 · La Plata County · 930 served · purchased surface water8
FAIRPLAY TOWN OF · Park County · 909 served · groundwater under surface influence8
NUCLA TOWN OF · Montrose County · 875 served · purchased surface water8
IGNACIO TOWN OF · La Plata County · 800 served · purchased surface water8
ROCKVALE TOWN OF · Fremont County · 504 served · purchased surface water8
ALMA TOWN OF · Park County · 460 served · surface water8
DINOSAUR TOWN OF · Moffat County · 350 served · groundwater8
ARABIAN ACRES MD · Teller County · 325 served · groundwater8
BUCKHORN RANCH WS · Gunnison County · 205 served · groundwater under surface influence8
ROARING FORK MHP · Pitkin County · 200 served · groundwater8
ASPEN MTN VIEW SUBD · Eagle County · 150 served · groundwater8
RAMAH TOWN OF · El Paso County · 125 served · groundwater8
SPRING VALLEY MUTUAL WA · Boulder County · 100 served · groundwater8
GARCIA DOMESTIC WUA · Costilla County · 100 served · groundwater8
LIGHTNER CREEK MHP · La Plata County · 90 served · groundwater8
BUCKSKIN VALLEY SUBDIVISION · Rio Blanco County · 28 served · groundwater8
WEST RANCH SUBD · Pitkin County · 28 served · groundwater8
RANCH AT COULTER CREEK HOA · Garfield County · 27 served · groundwater8
WELL ON WHEELS WATER HAULER · La Plata County · 25 served · purchased surface water8
OURAY CITY OF · Ouray County · 1,460 served · groundwater under surface influence7
DURANGO WEST MD NO 1 · La Plata County · 750 served · purchased surface water7
OAK MEADOWS MHP · Montezuma County · 200 served · purchased surface water7
LAZEAR DOMESTIC WC · Delta County · 178 served · groundwater7
COUNTRY GARDENS MHP · Arapahoe County · 115 served · groundwater7
VALLI HI MHP · Clear Creek County · 50 served · groundwater7
FLORENCE CITY OF · Fremont County · 7,500 served · surface water6
FLEMING TOWN OF · Logan County · 446 served · groundwater6
GAMBEL OAKS HOA · Elbert County · 350 served · groundwater6
CHANCELLORS MHC · El Paso County · 100 served · purchased groundwater6
LAST DOLLAR PUD · San Miguel County · 96 served · groundwater6
MILLARD MOBILE HOME PARK · Montrose County · 90 served · groundwater6
PEAKS SHADOW LLC · El Paso County · 67 served · groundwater6
RIVERBEND CABINS · Routt County · 55 served · groundwater6
EASTSIDE MHP · Chaffee County · 40 served · groundwater6
TV HILLS WATER · Custer County · 38 served · groundwater6
ENGLEWOOD CITY OF · Arapahoe County · 57,332 served · surface water5
AVONDALE WSD · Pueblo County · 1,615 served · groundwater5
ROGERS MESA WC · Delta County · 840 served · purchased surface water5
MONTEZUMA CNTY WD NO 1 · Montezuma County · 490 served · purchased surface water5
MITCHELL COOPER DITCH PIPELINE · Garfield County · 415 served · purchased surface water5
IDLEDALE WSD · Jefferson County · 350 served · groundwater under surface influence5
WJ METRO DISTRICT · Pitkin County · 324 served · groundwater under surface influence5
SKI TOWN VILLAGE · Gunnison County · 113 served · groundwater under surface influence5
MOUNTAIN SHADOWS MOBILE ESTATES · Pueblo County · 45 served · groundwater5
FOX HILL WATER ASSOCIATION INC · Weld County · 44 served · groundwater5
FT COLLINS CITY OF · Larimer County · 179,901 served · surface water4
BRIGHTON CITY OF · Adams County · 56,304 served · purchased surface water4
GREEN MOUNTAIN WSD · Jefferson County · 49,400 served · purchased surface water4
CLIFTON WD · Mesa County · 34,500 served · surface water4
WIDEFIELD WSD · El Paso County · 27,640 served · purchased surface water4
WHEAT RIDGE WATER DISTRICT · Jefferson County · 20,000 served · purchased surface water4
WOODMOOR WSD · El Paso County · 18,031 served · surface water4
US AIR FORCE ACADEMY · El Paso County · 16,876 served · purchased surface water4
ESTES PARK TOWN OF · Larimer County · 16,722 served · surface water4
NORTH WASHINGTON STREET WSD · Adams County · 14,500 served · purchased surface water4
ROXBOROUGH WSD · Douglas County · 13,765 served · surface water4
PINERY WWD · Douglas County · 12,901 served · purchased surface water4
STEAMBOAT SPRINGS CITY OF · Routt County · 9,950 served · purchased surface water4
RIFLE CITY OF · Garfield County · 9,489 served · surface water4
CORTEZ CITY OF · Montezuma County · 8,770 served · surface water4
WOODLAND PARK CITY OF · Teller County · 8,500 served · surface water4
EATON TOWN OF · Weld County · 7,328 served · purchased surface water4
DACONO CITY OF · Weld County · 6,900 served · purchased surface water4
STRATMOOR HILLS WSD · El Paso County · 6,500 served · purchased surface water4
SNOWMASS VILLAGE WSD · Pitkin County · 6,353 served · surface water4
NEW CASTLE TOWN OF · Garfield County · 5,024 served · surface water4
FRISCO TOWN OF · Summit County · 4,495 served · surface water4
SILT TOWN OF · Garfield County · 3,536 served · surface water4
ADVENIR FRENCH QUARTER · DENVER · 3,447 served · purchased surface water4
AKRON TOWN OF · Washington County · 2,379 served · groundwater4
PONCHA SPRINGS TOWN OF · Chaffee County · 2,118 served · groundwater4
KIMBERLY HILLS MHP · Adams County · 2,005 served · purchased surface water4
EL JEBEL MHP · Eagle County · 1,962 served · groundwater under surface influence4
DEL NORTE TOWN OF · Rio Grande County · 1,429 served · groundwater4
THE GROVE AT ALTA RIDGE · THORNTON · 1,300 served · purchased surface water4
EDGEMONT RANCH MD · La Plata County · 1,200 served · surface water4
DENVER CASCADE MHP · Adams County · 1,200 served · purchased surface water4
MINTURN TOWN OF · Eagle County · 1,200 served · surface water4
NORTH LINCOLN WSD · Jefferson County · 1,000 served · purchased surface water4
ARBORDALE ACRES MHP · Boulder County · 901 served · purchased surface water4
HUGO TOWN OF · Lincoln County · 885 served · groundwater4
PIEDRA PARK MD · Archuleta County · 850 served · groundwater under surface influence4
GOLDEN TERRACE WEST · GOLDEN · 825 served · purchased surface water4
DEER CREEK WD · Elbert County · 792 served · groundwater4
CALHAN TOWN OF · El Paso County · 780 served · groundwater4
VISTA VILLAGE MHP · BOULDER · 750 served · purchased surface water4
MILE HIGH WC · Adams County · 700 served · purchased surface water4
KEYSTONE RANCH · Summit County · 670 served · groundwater4
FRIENDLY VILLAGE OF GREELEY MHP · Weld County · 660 served · purchased surface water4
PRAIRIE GREENS MHP · Weld County · 654 served · purchased surface water4
OTIS TOWN OF · Washington County · 600 served · groundwater4
GOLDEN TERRACE VILLAGE · Jefferson County · 580 served · purchased surface water4
KV HOA INC · Saguache County · 580 served · groundwater4
BRUSH CREEK WD · Pitkin County · 516 served · purchased surface water4
EL MORRO MOBILE ESTATES · El Paso County · 504 served · purchased surface water4
CRAWFORD MESA WA · Delta County · 486 served · groundwater4
MOUNTAINSIDE ESTATES MHP · Jefferson County · 473 served · purchased surface water4
CHEYENNE MOUNTAIN ESTATES MHP · El Paso County · 472 served · purchased surface water4
BELLEVIEW CHRISTIAN COLLEGE · Adams County · 460 served · groundwater4
WESTWOOD LAKES WD · Teller County · 450 served · groundwater4
GOLDEN TERRACE SOUTH · GOLDEN · 425 served · purchased surface water4
AVILLA EASTLAKE · THORNTON · 410 served · purchased surface water4
EL RANCHO FLORIDA MD · La Plata County · 400 served · groundwater under surface influence4
ROMEO TOWN OF · Conejos County · 365 served · groundwater4
SANTA FE TRAIL RANCH MD · Las Animas County · 360 served · purchased surface water4
LA PLATA WEST WATER AUTHORITY · La Plata County · 354 served · purchased surface water4
HI LAND ACRES WSD · Adams County · 350 served · groundwater4
WATTENBERG IMPROVEMENT ASSOC · Weld County · 350 served · groundwater4
MOUNTAIN VALLEY MHP · Garfield County · 338 served · groundwater4
GREEN ACRES MHP · Adams County · 325 served · groundwater4
BEVERLY HILLS MUTUAL WC · Douglas County · 325 served · groundwater4
LAZY GLEN HOA · Pitkin County · 322 served · groundwater4
WILL O WISP METRO DISTRICT · Park County · 300 served · groundwater4
RANCH AT ROARING FORK · Garfield County · 300 served · groundwater4
TERRACE PARK MHP · Weld County · 297 served · purchased surface water4
CRESTONE WS · Saguache County · 293 served · groundwater4
96 PIPELINE CO INC · Crowley County · 285 served · purchased groundwater4
SLEEPY VALLEY COMMUNITY MHP · El Paso County · 260 served · purchased surface water4
CAPULIN WD · Conejos County · 250 served · groundwater4
WESTSIDE MHP · La Plata County · 236 served · groundwater4
DOT MHP · Eagle County · 229 served · groundwater4
ROCK CREEK MESA · El Paso County · 225 served · surface water4
WOODY CREEK METROPOLITAN DISTRICT · Pitkin County · 220 served · groundwater4
SEDALIA WSD · Douglas County · 215 served · groundwater under surface influence4
KOURY TRANSPORT · Pueblo County · 215 served · purchased surface water4
WESTERN HILLS MHP · Mesa County · 213 served · purchased surface water4
GREETVILLE CARBONDALE WATER · Las Animas County · 210 served · purchased surface water4
NEW VISION MHP · Weld County · 200 served · groundwater4
VISTA VERDE VILLAGE · CORTEZ · 200 served · purchased surface water4
BUTTERMILK MD · Pitkin County · 200 served · purchased surface water4
MT ELBERT WA · Lake County · 170 served · groundwater4
NEWELL WARNOCK WA · Larimer County · 160 served · surface water4
4 WAY RANCH MD 2 · El Paso County · 150 served · groundwater4
KNOLLS AT DURANGO HOA · La Plata County · 150 served · groundwater4
SLEEPY BEAR MHP · Routt County · 150 served · groundwater under surface influence4
LONGVIEW MOBILE HOME PARK · Denver County · 147 served · purchased surface water4
HUAJATOLLA VALLEY ESTATES INC · Huerfano County · 132 served · groundwater under surface influence4
SEABOARD FOODS LLC · Yuma County · 132 served · groundwater4
SAN BERNARDO HOA · San Miguel County · 132 served · groundwater4
BRANSON TOWN OF · Las Animas County · 131 served · groundwater under surface influence4
RIVERMAZE COOP MHP · Fremont County · 128 served · purchased surface water4
SIERRA BONITA ESTATES · Arapahoe County · 122 served · purchased surface water4
HIDDEN VALLEY HOA WATER COMPANY · PAONIA · 120 served · purchased surface water4
COKEDALE TOWN OF · TRINIDAD · 120 served · purchased surface water4
KIM TOWN OF · Las Animas County · 116 served · groundwater4
MARBLE WC · Gunnison County · 113 served · groundwater4
INDIAN TRAILS WATER LLC · Rio Grande County · 110 served · groundwater4
MILNER PARK · Routt County · 100 served · groundwater4
CRYSTAL VALLEY · Garfield County · 100 served · groundwater4
NEIGHBORS OF 7TH STREET MHP · Montezuma County · 96 served · purchased surface water4
EXCELL LAWSON VILLAGE · Clear Creek County · 90 served · groundwater4
RIVER VILLAGE LLC · Chaffee County · 90 served · groundwater4
TELLER SPRINGS HOA · Garfield County · 84 served · groundwater4
SATANK WA · Garfield County · 80 served · purchased surface water4
PINON HILLS WATER USERS ASSOCIATION · Huerfano County · 75 served · groundwater4
LARK MEADOWS WA · Boulder County · 75 served · groundwater4
BIG PINES CAMPGROUND · El Paso County · 72 served · groundwater4
MINNESOTA PIPELINE · PAONIA · 72 served · purchased surface water4
KEETON RANCH WATER · El Paso County · 70 served · purchased surface water4
PINE LAKE VILLAGE · Weld County · 65 served · purchased surface water4
WEST PAONIA DOMESTIC WATER COMPANY · PAONIA · 57 served · purchased surface water4
HASWELL TOWN OF · Kiowa County · 55 served · groundwater4
MOOSE HAVEN CONDOS · Lake County · 48 served · groundwater4
CATTLE CREEK WUA · Garfield County · 47 served · groundwater under surface influence4
SOUTH LAMBORN MESA WATER COMPANY · PAONIA · 47 served · purchased surface water4
VAN DEN BERG MD · La Plata County · 41 served · purchased surface water4
CHICOSA WATER USERS ASSOCIATION · TRINIDAD · 40 served · purchased surface water4
G AND M MOBILE HOME PARK · Rio Grande County · 30 served · groundwater4
FOUNTAIN VALLEY AUTHORITY · El Paso County · 13 served · surface water4
SOUTH SHERIDAN WATER AND SEWER DIST · Jefferson County · 2,500 served · purchased surface water3
PARK FOREST · El Paso County · 930 served · groundwater3
SAN JUAN RIVER VILLAGE MD · Archuleta County · 877 served · groundwater under surface influence3
COLORADO MTN COLLEGE SVC · Garfield County · 715 served · groundwater3
CONSOLIDATED GLACIER VIEW MEADOWS ASSOC · Larimer County · 395 served · groundwater3
MOUNTAIN VIEW WUA · Adams County · 320 served · groundwater3
SEIBERT TOWN OF · Kit Carson County · 296 served · groundwater3
OVID TOWN OF · Sedgwick County · 259 served · groundwater3
ARROWHEAD MHP · El Paso County · 135 served · groundwater3
THE HIDEOUT AT GLENWOOD SPRINGS · Garfield County · 94 served · groundwater3
GRANDVIEW MHP · El Paso County · 90 served · groundwater3
MT PRINCETON HOA · Chaffee County · 79 served · purchased groundwater3
LOS PRADOS HOA · La Plata County · 45 served · groundwater3
VIEW RIDGE MUTUAL WC · Douglas County · 35 served · groundwater3
OLNEY SPRINGS TOWN OF · Crowley County · 399 served · groundwater2
ILIUM VALLEY WS · San Miguel County · 322 served · groundwater2
SECURITY MHP · El Paso County · 150 served · groundwater2
SPRING VIEW TP · Montrose County · 145 served · groundwater2
GREEN ACRES MHP · Eagle County · 130 served · groundwater under surface influence2
SUNRISE TRAILER PARK · Montrose County · 60 served · groundwater2
DENVER WATER BOARD · Denver County · 1,287,000 served · surface waternone on record
AURORA CITY OF · Arapahoe County · 533,407 served · surface waternone on record
COLORADO SPRINGS UTILITIES · El Paso County · 464,111 served · surface waternone on record
THORNTON CITY OF · Adams County · 226,465 served · surface waternone on record
WESTMINSTER CITY OF · Adams County · 202,078 served · surface waternone on record
ARVADA CITY OF · Jefferson County · 171,610 served · surface waternone on record
GREELEY CITY OF · Weld County · 132,310 served · surface waternone on record
PUEBLO BOARD OF WW · Pueblo County · 114,070 served · surface waternone on record
CASTLE ROCK TOWN OF · Douglas County · 110,298 served · surface waternone on record
LONGMONT CITY OF · Boulder County · 104,178 served · surface waternone on record
HIGHLANDS RANCH WSD · Douglas County · 103,444 served · surface waternone on record
UTE WCD · Mesa County · 92,580 served · surface waternone on record
LOVELAND CITY OF · Larimer County · 91,077 served · surface waternone on record
CONSOLIDATED MUTUAL MAPLE GROVE · Jefferson County · 81,400 served · surface waternone on record
PARKER WSD · Douglas County · 75,949 served · surface waternone on record
SOUTH ADAMS COUNTY WSD · Adams County · 75,559 served · purchased surface waternone on record
EAST CHERRY CREEK VALLEY WSD · Arapahoe County · 66,130 served · purchased surface waternone on record
FT COLLINS LOVELAND WD · Larimer County · 63,532 served · purchased surface waternone on record
SOUTHGATE WSD · Arapahoe County · 55,000 served · purchased surface waternone on record
EAGLE RIVER WSD · Eagle County · 51,515 served · surface waternone on record
NORTHGLENN CITY OF · Adams County · 48,927 served · surface waternone on record
SOUTHWEST METROPOLITAN WSD · Arapahoe County · 48,648 served · purchased surface waternone on record
US DEPARTMENT OF THE ARMY FORT CARSON · El Paso County · 48,000 served · purchased surface waternone on record
ERIE TOWN OF · Boulder County · 47,444 served · surface waternone on record
BANCROFT CLOVER WSD · Jefferson County · 44,000 served · purchased surface waternone on record
GOLDEN CITY OF · Jefferson County · 38,288 served · surface waternone on record
CANON CITY CITY OF · Fremont County · 34,800 served · surface waternone on record
DURANGO CITY OF · La Plata County · 33,787 served · surface waternone on record
ASPEN CITY OF · Pitkin County · 31,100 served · surface waternone on record
ARAPAHOE CNTY WWWA · Arapahoe County · 31,000 served · groundwaternone on record
BEAR CREEK WSD · Jefferson County · 30,000 served · purchased surface waternone on record
CHEROKEE MD · El Paso County · 29,610 served · groundwaternone on record
LAFAYETTE CITY OF · Boulder County · 28,700 served · surface waternone on record
EAST LARIMER COUNTY WD · Larimer County · 27,944 served · purchased surface waternone on record
FIRESTONE TOWN OF · Weld County · 27,798 served · purchased surface waternone on record
CSU MAIN AND WEST HOUSING CAMPUS · Larimer County · 27,375 served · purchased surface waternone on record
GRAND JUNCTION CITY OF · Mesa County · 26,000 served · surface waternone on record
LITTLE THOMPSON WD · Larimer County · 25,654 served · purchased surface waternone on record
FOUNTAIN CITY OF · El Paso County · 25,130 served · purchased surface waternone on record
CRESTVIEW WSD · Adams County · 23,756 served · purchased surface waternone on record
WINDSOR TOWN OF · Weld County · 23,500 served · purchased surface waternone on record
MERIDIAN MD · Douglas County · 23,415 served · purchased surface waternone on record
CHERRY CREEK VALLEY WSD · Denver County · 22,000 served · purchased surface waternone on record
TRI COUNTY WCD · Montrose County · 20,490 served · purchased surface waternone on record
LEFT HAND WD · Boulder County · 20,280 served · surface waternone on record
SECURITY WATER DISTRICT · El Paso County · 20,000 served · purchased surface waternone on record
PLATTE CANYON WSD · Arapahoe County · 19,485 served · purchased surface waternone on record
EVANS CITY OF · Weld County · 19,369 served · purchased surface waternone on record
MONTROSE CITY OF · Montrose County · 19,305 served · purchased surface waternone on record
WILLOWS WD · Arapahoe County · 19,000 served · purchased surface waternone on record
FREDERICK TOWN OF · Weld County · 17,173 served · purchased surface waternone on record
NORTH WELD COUNTY WD · Weld County · 15,890 served · purchased surface waternone on record
EVERGREEN MD · Jefferson County · 15,750 served · surface waternone on record
STONEGATE MD · Douglas County · 15,295 served · purchased surface waternone on record
GYPSUM TOWN OF · Eagle County · 15,272 served · surface waternone on record
BLACK HAWK CITY OF · Gilpin County · 15,167 served · surface waternone on record
STERLING CITY OF · Logan County · 15,100 served · groundwater under surface influencenone on record
WOODMEN HILLS MD · El Paso County · 13,888 served · groundwaternone on record
MONTEZUMA WC · Montezuma County · 13,797 served · surface waternone on record
CASTLE PINES NORTH MD · Douglas County · 12,800 served · purchased surface waternone on record
MERIDIAN SERVICE MD · El Paso County · 12,760 served · groundwaternone on record
KEN CARYL WSD · Jefferson County · 12,000 served · purchased surface waternone on record
LAKEHURST WSD · Jefferson County · 12,000 served · purchased surface waternone on record
FT MORGAN CITY OF · Morgan County · 12,000 served · surface waternone on record
SEVERANCE TOWN OF · Weld County · 11,733 served · purchased surface waternone on record
FEDERAL HEIGHTS CITY OF · Adams County · 11,678 served · purchased surface waternone on record
STERLING RANCH CAB · Douglas County · 11,501 served · purchased surface waternone on record
TRINIDAD CITY OF · Las Animas County · 11,400 served · surface waternone on record
ALAMOSA CITY OF · Alamosa County · 11,271 served · groundwaternone on record
PAGOSA AREA WSD · Archuleta County · 11,069 served · surface waternone on record
COTTONWOOD WSD · Douglas County · 10,867 served · purchased surface waternone on record
IDAHO SPRINGS CITY OF · Clear Creek County · 10,432 served · surface waternone on record
VALLEY WD · Jefferson County · 10,000 served · purchased surface waternone on record
NORTH TABLE MOUNTAIN WSD · Jefferson County · 10,000 served · surface waternone on record
SNAKE RIVER WD · Summit County · 9,900 served · groundwaternone on record
MORRISON TOWN OF · Jefferson County · 9,887 served · surface waternone on record
MOUNTAIN VILLAGE TOWN OF · San Miguel County · 9,700 served · groundwaternone on record
ST CHARLES MESA WD · Pueblo County · 9,690 served · surface waternone on record
GUNNISON CITY OF · Gunnison County · 9,610 served · groundwaternone on record
GLENWOOD SPRINGS CITY OF · Garfield County · 9,428 served · surface waternone on record
WILLOWBROOK WSD · Jefferson County · 9,348 served · purchased surface waternone on record
CHERRY CREEK VILLAGE WD · Arapahoe County · 9,215 served · purchased surface waternone on record
MILLIKEN TOWN OF · Weld County · 9,200 served · purchased surface waternone on record
CRAIG CITY OF · Moffat County · 8,930 served · surface waternone on record
DELTA CITY OF · Delta County · 8,700 served · purchased surface waternone on record
SILVERTHORNE TOWN OF · Summit County · 8,400 served · groundwaternone on record
LA JUNTA CITY OF · Otero County · 8,320 served · groundwaternone on record
INVERNESS WSD · Arapahoe County · 8,140 served · purchased surface waternone on record
MORGAN COUNTY QUALITY WD · Morgan County · 8,116 served · purchased surface waternone on record
CENTRAL WELD CNTY WD · Weld County · 7,662 served · purchased surface waternone on record
EAGLE TOWN OF · Eagle County · 7,511 served · surface waternone on record
PARKVILLE WD · Lake County · 7,500 served · surface waternone on record
LAMAR CITY OF · Prowers County · 7,500 served · groundwaternone on record
Source: U.S. EPA Safe Drinking Water Information System (SDWIS). "Health-based" counts maximum-contaminant-level, treatment-technique and maximum-residual-disinfectant-level violations recorded since 2015. A violation on record — especially a resolved one — is not a statement about water quality today; contact the water system or your state drinking-water program for current information.