Skip to main content
WaterVerge
Alerts Cities States PFAS Tracker Guides News Maps Glossary Methodology

Colorado ZIP Code Water Quality

415 ZIP codes with water quality data · State average grade: C+

ZIP Codes
415
Avg Grade
C+
A or B
28%
D or F
64%
Grade Distribution

How Colorado ZIP codes scored

11%
17%
8%
17%
47%
A
45
11%
Excellent
B
70
17%
Good
C
34
8%
Fair
D
69
17%
Poor
F
197
47%
Failing
All ZIP Codes

All 415 ZIP codes in Colorado

ZIP Code Primary City Grade Score Score Cities
80001 Arvada
B+
 83.5
1
80002 Arvada
B+
 83.5
1
80003 Westminster
D
 46
2
80004 Arvada
B+
 83.5
1
80005 Westminster
D
 46
2
80006 Arvada
B+
 83.5
1
80007 Arvada
B+
 83.5
1
80010 Aurora
F
 38.1
1
80011 Aurora
F
 38.1
1
80012 Aurora
F
 38.1
1
80013 Aurora
F
 38.1
1
80014 Aurora
F
 38.1
1
80015 Aurora
F
 38.1
2
80016 Aurora
F
 38.1
2
80017 Aurora
F
 38.1
1
80018 Aurora
F
 38.1
1
80019 Aurora
F
 38.1
1
80020 Westminster
D
 46
2
80021 Westminster
D
 46
2
80022 Commerce City
A
 93.2
1
80023 Thornton
F
 38
2
80026 Lafayette
F
 42.6
1
80027 Louisville
A-
 88.7
2
80030 Westminster
D
 46
1
80031 Westminster
D
 46
1
80033 Wheat Ridge
D
 45
1
80034 Wheat Ridge
D
 45
1
80035 Westminster
D
 46
1
80037 Commerce City
A
 93.2
1
80038 Broomfield
B
 78.5
1
80040 Aurora
F
 38.1
1
80041 Aurora
F
 38.1
1
80042 Aurora
F
 38.1
1
80044 Aurora
F
 38.1
1
80045 Aurora
F
 38.1
1
80046 Aurora
F
 38.1
1
80047 Aurora
F
 38.1
1
80102 Bennett
A-
 89.3
1
80103 Byers
A
 90.6
1
80104 Castle Rock
F
 40
1
80105 Deer Trail
A-
 87
1
80107 Elizabeth
B
 77.3
1
80108 Castle Rock
F
 40
2
80109 Castle Rock
F
 40
1
80110 Englewood
D
 49.8
1
80111 Centennial
F
 36.8
2
80112 Centennial
F
 36.8
1
80113 Englewood
D
 49.8
1
80117 Kiowa
A-
 85.8
1
80118 Larkspur
D+
 51.5
1
80120 Littleton
F
 40.9
1
80121 Centennial
F
 36.8
2
80122 Littleton
F
 40.9
2
80123 Denver
F
 39.6
2
80126 Highlands Ranch
B-
 71.5
1
80128 Littleton
F
 40.9
1
80129 Highlands Ranch
B-
 71.5
1
80130 Highlands Ranch
B-
 71.5
1
80132 Monument
F
 41.8
2
80133 Palmer Lake
D
 45
1
80134 Parker
F
 43.4
1
80135 Sedalia
C+
 68.4
1
80136 Strasburg
D
 47
1
80137 Aurora
F
 38.1
2
80138 Parker
F
 43.4
1
80150 Englewood
D
 49.8
1
80151 Englewood
D
 49.8
1
80155 Centennial
F
 36.8
1
80160 Littleton
F
 40.9
1
80161 Centennial
F
 36.8
1
80163 Highlands Ranch
B-
 71.5
1
80165 Littleton
F
 40.9
1
80166 Littleton
F
 40.9
1
80201 Lakewood
F
 36.9
1
80202 Denver
F
 39.6
1
80203 Denver
F
 39.6
1
80204 Denver
F
 39.6
1
80205 Denver
F
 39.6
1
80206 Denver
F
 39.6
1
80207 Denver
F
 39.6
1
80208 Denver
F
 39.6
1
80209 Denver
F
 39.6
1
80210 Denver
F
 39.6
1
80211 Denver
F
 39.6
1
80212 Denver
F
 39.6
1
80214 Lakewood
F
 36.9
2
80215 Lakewood
F
 36.9
1
80216 Denver
F
 39.6
1
80217 Denver
F
 39.6
1
80218 Denver
F
 39.6
1
80219 Denver
F
 39.6
1
80220 Denver
F
 39.6
1
80221 Denver
F
 39.6
1
80222 Denver
F
 39.6
1
80223 Denver
F
 39.6
1
80224 Denver
F
 39.6
1
80225 Lakewood
F
 36.9
1
80226 Lakewood
F
 36.9
1
80227 Denver
F
 39.6
2
80228 Lakewood
F
 36.9
1
80229 Thornton
F
 38
1
80230 Denver
F
 39.6
1
80231 Denver
F
 39.6
1
80232 Lakewood
F
 36.9
1
80233 Thornton
F
 38
2
80234 Westminster
D
 46
2
80235 Denver
F
 39.6
2
80236 Denver
F
 39.6
1
80237 Denver
F
 39.6
1
80238 Denver
F
 39.6
1
80239 Denver
F
 39.6
1
80241 Thornton
F
 38
1
80243 Denver
F
 39.6
1
80246 Denver
F
 39.6
2
80247 Denver
F
 39.6
2
80248 Denver
F
 39.6
1
80249 Denver
F
 39.6
1
80250 Denver
F
 39.6
1
80256 Denver
F
 39.6
1
80257 Denver
F
 39.6
1
80259 Denver
F
 39.6
1
80260 Thornton
F
 38
3
80261 Denver
F
 39.6
1
80264 Denver
F
 39.6
1
80265 Denver
F
 39.6
1
80266 Denver
F
 39.6
1
80271 Denver
F
 39.6
1
80273 Denver
F
 39.6
1
80274 Denver
F
 39.6
1
80281 Denver
F
 39.6
1
80290 Denver
F
 39.6
1
80291 Denver
F
 39.6
1
80293 Denver
F
 39.6
1
80294 Denver
F
 39.6
1
80299 Denver
F
 39.6
1
80301 Boulder
F
 43.4
1
80302 Boulder
F
 43.4
1
80303 Boulder
F
 43.4
1
80304 Boulder
F
 43.4
1
80305 Boulder
F
 43.4
1
80307 Boulder
F
 43.4
1
80308 Nederland
A-
 87.6
1
80309 Boulder
F
 43.4
1
80310 Boulder
F
 43.4
1
80314 Boulder
F
 43.4
1
80401 Golden
B-
 70.5
1
80402 Golden
B-
 70.5
1
80403 Arvada
B+
 83.5
2
80419 Golden
B-
 70.5
1
80421 Bailey
C
 61.8
1
80422 Black Hawk
A-
 87.5
1
80424 Breckenridge
B+
 84.9
1
80427 Black Hawk
A-
 87.5
2
80433 Conifer
B+
 83.5
1
80435 Keystone
C
 61.9
2
80437 Evergreen
F
 41.8
1
80438 Empire
C+
 68.1
1
80439 Evergreen
F
 41.8
1
80440 Fairplay
C
 61.8
1
80442 Fraser
C-
 57.5
1
80443 Copper Mountain
B+
 82.8
2
80444 Georgetown
A-
 87.7
1
80446 Granby
C-
 55.8
1
80447 Grand Lake
B+
 82.3
1
80451 Hot Sulphur Springs
A-
 86.8
1
80452 Idaho Springs
B
 75.2
2
80454 Indian Hills
B
 75.5
1
80459 Kremmling
C
 64.7
1
80461 Leadville
D
 47.5
1
80465 Morrison
C+
 69.9
1
80466 Nederland
A-
 87.6
1
80467 Oak Creek
D
 49
1
80478 Granby
C-
 55.8
2
80480 Walden
B
 78.9
1
80482 Winter Park
D
 47
2
80487 Steamboat Springs
F
 42.6
2
80498 Silverthorne
D+
 54.1
1
80501 Longmont
A-
 89
1
80503 Longmont
A-
 89
2
80504 Longmont
A-
 89
3
80513 Berthoud
C+
 65.2
1
80514 Frederick
B-
 73.6
2
80516 Broomfield
B
 78.5
3
80517 Estes Park
D
 46.4
1
80520 Firestone
A-
 86.9
1
80521 Fort Collins
D
 46.8
1
80523 Fort Collins
D
 46.8
1
80524 Fort Collins
D
 46.8
1
80525 Fort Collins
D
 46.8
1
80526 Fort Collins
D
 46.8
1
80527 Fort Collins
D
 46.8
1
80528 Fort Collins
D
 46.8
1
80530 Frederick
B-
 73.6
1
80534 Berthoud
C+
 65.2
3
80537 Loveland
F
 43.8
1
80538 Loveland
F
 43.8
1
80539 Loveland
F
 43.8
1
80540 Lyons
D
 45
1
80543 Milliken
B
 77.6
1
80544 Niwot
A
 93.7
1
80546 Severance
A
 92.3
1
80549 Wellington
B-
 73.8
1
80550 Windsor
D
 48.8
2
80551 Windsor
D
 48.8
1
80553 Fort Collins
D
 46.8
1
80601 Brighton
F
 36
1
80602 Thornton
F
 38
1
80603 Brighton
F
 36
4
80610 Severance
A
 92.3
2
80614 Thornton
F
 38
1
80615 Lucerne
B+
 84.2
3
80620 Evans
B+
 80
1
80621 Fort Lupton
D
 45
1
80623 Gilcrest
B+
 84.9
1
80631 Greeley
F
 44.1
2
80632 Greeley
F
 44.1
1
80633 Greeley
F
 44.1
1
80634 Greeley
F
 44.1
2
80638 Greeley
F
 44.1
1
80639 Greeley
F
 44.1
1
80640 Thornton
F
 38
2
80642 Hudson
D
 48
1
80643 Keenesburg
A-
 86.7
2
80644 Kersey
A-
 88.3
1
80645 Evans
B+
 80
1
80650 Pierce
A
 90.2
1
80651 Milliken
B
 77.6
3
80654 Wiggins
D+
 50
1
80701 Fort Morgan
A-
 89.2
1
80705 Log Lane Village
B+
 83.9
1
80720 Akron
B
 77.1
1
80731 Haxtun
C
 60.7
1
80733 Hillrose
B+
 83.8
1
80734 Holyoke
C+
 69.9
1
80737 Julesburg
B-
 73.9
1
80743 Otis
C+
 69.9
1
80751 Sterling
C-
 56.6
1
80758 Wray
B+
 84.2
1
80759 Yuma
C+
 65.5
1
80807 Burlington
C-
 55.8
1
80808 Calhan
D+
 50
1
80810 Cheyenne Wells
B
 78
1
80813 Cripple Creek
B
 77.5
1
80814 Divide
F
 44.5
1
80815 Flagler
A-
 86.8
1
80817 Fountain
F
 41.9
1
80821 Hugo
B-
 74.4
1
80828 Limon
A-
 86.2
1
80829 Colorado Springs
F
 33.5
2
80831 Falcon
D
 49.2
2
80835 Simla
A-
 87.3
1
80836 Stratton
C-
 57.9
1
80863 Woodland Park
D
 46
1
80866 Woodland Park
D
 46
1
80901 Colorado Springs
F
 33.5
1
80902 Fort Carson
A-
 85.7
1
80903 Colorado Springs
F
 33.5
1
80904 Colorado Springs
F
 33.5
1
80905 Colorado Springs
F
 33.5
1
80906 Colorado Springs
F
 33.5
1
80907 Colorado Springs
F
 33.5
1
80909 Colorado Springs
F
 33.5
1
80910 Colorado Springs
F
 33.5
1
80913 Fort Carson
A-
 85.7
1
80914 Colorado Springs
F
 33.5
1
80915 Colorado Springs
F
 33.5
1
80916 Colorado Springs
F
 33.5
1
80917 Colorado Springs
F
 33.5
1
80918 Colorado Springs
F
 33.5
1
80919 Colorado Springs
F
 33.5
1
80920 Colorado Springs
F
 33.5
1
80921 Colorado Springs
F
 33.5
2
80922 Colorado Springs
F
 33.5
1
80923 Colorado Springs
F
 33.5
1
80924 Colorado Springs
F
 33.5
1
80925 Colorado Springs
F
 33.5
1
80927 Colorado Springs
F
 33.5
1
80929 Colorado Springs
F
 33.5
1
80932 Colorado Springs
F
 33.5
1
80934 Colorado Springs
F
 33.5
1
80935 Colorado Springs
F
 33.5
1
80936 Colorado Springs
F
 33.5
1
80937 Colorado Springs
F
 33.5
1
80938 Colorado Springs
F
 33.5
1
80939 Colorado Springs
F
 33.5
1
80941 Colorado Springs
F
 33.5
1
80942 Colorado Springs
F
 33.5
1
80946 Colorado Springs
F
 33.5
1
80947 Colorado Springs
F
 33.5
1
80949 Colorado Springs
F
 33.5
1
80950 Colorado Springs
F
 33.5
1
80951 Colorado Springs
F
 33.5
1
80960 Colorado Springs
F
 33.5
1
80962 Colorado Springs
F
 33.5
1
80977 Colorado Springs
F
 33.5
1
80995 Colorado Springs
F
 33.5
1
80997 Colorado Springs
F
 33.5
1
81001 Pueblo
F
 40.9
1
81002 Pueblo
F
 40.9
1
81003 Pueblo
F
 40.9
1
81004 Pueblo
F
 40.9
1
81005 Pueblo
F
 40.9
1
81007 Pueblo West
B-
 71
1
81008 Pueblo
F
 40.9
1
81010 Pueblo
F
 40.9
1
81011 Pueblo
F
 40.9
1
81012 Pueblo
F
 40.9
1
81019 Colorado City
F
 42
1
81023 Beulah
D
 49
1
81036 Eads
A
 91.4
1
81039 Fowler
B
 76.1
1
81041 Granada
D
 45
1
81047 Holly
D+
 50
1
81050 La Junta
F
 43.2
1
81052 Lamar
B-
 74.8
1
81054 Las Animas
B+
 81.8
1
81055 La Veta
F
 41.9
1
81058 Manzanola
D+
 50
1
81063 Ordway
C+
 68.6
1
81067 Rocky Ford
F
 29.2
1
81069 Colorado City
F
 42
2
81073 Springfield
B+
 82.8
1
81077 Swink
A-
 87.6
1
81082 Trinidad
D
 46
1
81089 Walsenburg
D
 49
1
81090 Walsh
D+
 53.1
1
81092 Wiley
D+
 52
1
81101 Alamosa
D
 47.2
1
81120 Antonito
F
 41.5
1
81122 Bayfield
D
 49
1
81125 Center
A-
 86.3
1
81130 Creede
B
 78.2
1
81131 Crestone
B-
 72.3
1
81132 Del Norte
B
 75.9
1
81135 Monte Vista
D+
 51
1
81137 Ignacio
F
 38
1
81140 La Jara
B
 78.7
1
81141 Manassa
B
 79.6
1
81143 Moffat
B-
 71.2
1
81144 Monte Vista
D+
 51
1
81147 Pagosa Springs
F
 42
1
81149 Saguache
D+
 50
1
81151 Sanford
A
 94.2
1
81152 San Luis
D
 46
1
81154 South Fork
D
 46
1
81201 Salida
D
 45.8
2
81211 Buena Vista
F
 43.5
1
81212 Canon City
B+
 83
2
81215 Canon City
B+
 83
1
81224 Crested Butte
C-
 57.8
1
81225 Mount Crested Butte
A-
 86.2
1
81226 Florence
C+
 68.8
2
81230 Gunnison
C
 63.7
1
81231 Gunnison
C
 63.7
1
81235 Lake City
A-
 87.2
1
81236 Nathrop
B+
 82.2
1
81240 Penrose
A-
 88.6
1
81242 Poncha Springs
A-
 86.7
1
81244 Rockvale
B
 77.8
1
81252 Westcliffe
B-
 74.5
1
81290 Florence
C+
 68.8
1
81301 Durango
F
 38
1
81321 Cortez
D
 47.2
1
81323 Dolores
B
 77.4
1
81324 Dove Creek
C-
 59
1
81326 Durango
F
 38
1
81328 Mancos
C
 62.7
1
81334 Towoac
D
 45
1
81401 Montrose
F
 42.2
1
81402 Montrose
F
 42.2
1
81403 Montrose
F
 42.2
1
81413 Cedaredge
D
 45
1
81415 Crawford
F
 41
1
81416 Delta
A-
 85.7
1
81419 Hotchkiss
F
 31
1
81422 Naturita
C-
 59
1
81423 Norwood
B-
 72.8
1
81424 Nucla
D
 45
1
81425 Olathe
B
 79
1
81427 Ouray
C-
 57.4
1
81428 Paonia
D
 48.5
1
81431 Redvale
D
 48
1
81432 Ridgway
D+
 53.7
1
81433 Silverton
A-
 85.4
1
81435 Telluride
D
 45
1
81501 Grand Junction
B
 79
1
81502 Grand Junction
B
 79
1
81503 Grand Junction
B
 79
1
81504 Grand Junction
B
 79
2
81505 Grand Junction
B
 79
1
81506 Grand Junction
B
 79
1
81507 Grand Junction
B
 79
1
81520 Clifton
A
 92.5
1
81526 Palisade
C-
 57.9
1
81601 Glenwood Springs
F
 41
1
81611 Aspen
D
 49.5
3
81615 Snowmass Village
B-
 72.7
1
81621 Basalt
D
 49
1
81623 Carbondale
F
 42.2
2
81624 Collbran
A-
 88.6
1
81625 Craig
B
 77.7
1
81631 Eagle
C+
 67.4
1
81632 Edwards
C
 63.5
1
81635 Parachute
A-
 88.7
1
81637 Gypsum
A+
 95
1
81639 Hayden
D
 49.2
1
81641 Meeker
C+
 69.5
1
81645 Minturn
B+
 82.5
1
81647 New Castle
A-
 88
1
81648 Rangely
C+
 69.8
1
81649 Minturn
B+
 82.5
1
81650 Rifle
D
 46.2
1
81652 Silt
F
 43
1
81656 Woody Creek
D+
 50.5
1
81657 Vail
A
 93.9
1
← All states ZIP directory Colorado water overview Colorado water alerts →