Water Quality in Colorado
EPA violation data for public water systems across Colorado.
580
ZIP Codes
19,147
Total Violations
60 (10%)
ZIPs with 0 Violations
33.0
Avg per ZIP
National avg: 18.87 violations per ZIP.
Colorado is 75% above average.
Violation Map
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0
1-5
6-15
16+
EPA violations (5yr)
Most Affected Areas in Colorado
All ZIP Codes in Colorado (580)
81144 Alamosa
537 81623 Vail
315 81435 Telluride
266 80301 Boulder
247 81143 Moffat
240 80487 Steamboat Springs
233 81058 La Junta
219 81067 La Junta
211 80814 Woodland
208 81430 Redvale
206 81426 Redvale
204 81419 Delta
202 81432 Redvale
193 80550 Fort Collins
192 81092 Lamar
187 81423 Montrose
182 80816 Woodland
181 80013 Aurora
176 80237 Denver
175 81050 La Junta
174 81431 Montrose
174 81325 Redvale
171 80116 Castle Rock
164 80125 Lakewood
158 81301 Durango
158 80134 Castle Rock
156 81650 Rifle
154 80011 Aurora
153 80461 Leadville
152 80260 Thornton
151 80210 Denver
149 80831 Colorado Springs
146 81071 Sheridan Lake
144 81008 Colorado Springs
143 81639 Steamboat Springs
139 81154 South Fork
138 81621 Vail
132 80525 Fort Collins
131 80866 Woodland Park
130 81030 La Junta
125 80540 Fort Collins
124 80926 Colorado Springs
118 81251 Leadville
116 80517 Fort Collins
111 81413 Cedaredge
109 81641 Craig
105 80443 Breckenridge
104 00000 Administrative Contact
103 80026 Boulder
103 80137 Aurora
99 80908 Colorado Springs
98 81424 Montrose
93 80642 Thornton
92 80538 Fort Collins
91 80545 Fort Collins
90 80906 Colorado Springs
90 81122 Durango
90 80827 Woodland
89 80903 Colorado Springs
88 81334 Dolores
87 80120 Aurora
86 81089 Walsenburg
86 80104 Castle Rock
85 80111 Aurora
85 81428 Delta
85 80863 Colorado Springs
84 80207 Denver
83 80758 Wray
83 81302 Durango
82 81019 Pueblo
81 80428 Steamboat Springs
79 81211 Buena Vista
79 81047 Lamar
76 80033 Lakewood
75 81601 Glenwood Springs
75 80439 Lakewood
74 81321 Dolores
72 80228 Lakewood
70 81023 Pueblo
70 81101 Alamosa
70 81610 Craig
68 81201 Canon City
67 81147 Pagosa Springs
66 80012 Denver
64 80135 Lakewood
64 80467 Steamboat Springs
64 81652 Rifle
64 80442 Winter Park
63 81123 Blanca
63 81631 Vail
63 80526 Fort Collins
61 80621 Greeley
61 81303 Durango
61 80246 Denver
60 81069 Pueblo
60 80701 Thornton
59 80136 Aurora
58 81006 Pueblo
58 80118 Castle Rock
57 80860 Woodland
53 80027 Boulder
52 81082 Trinidad
52 81210 Almont
52 80482 Winter Park
51 80513 Fort Collins
51 80536 Fort Collins
51 80109 Castle Rock
50 80421 Lakewood
50 80452 Black Hawk
50 80424 Breckenridge
49 80512 Fort Collins
49 80751 Sterling
49 80435 Breckenridge
48 81625 Steamboat Springs
48 80303 Boulder
47 80524 Fort Collins
47 81638 Steamboat Springs
47 81653 Steamboat Springs
47 81120 Antonito
46 80133 Colorado Springs
45 80477 Steamboat Springs
45 80510 Boulder
45 80537 Fort Collins
45 81054 Las Animas
45 81328 Durango
45 81656 Aspen
45 80031 Lakewood
44 80446 Winter Park
44 80016 Aurora
43 80549 Fort Collins
43 81001 Pueblo
42 81429 Montrose
42 80504 Fort Collins
41 81252 Westcliffe
41 80465 Lakewood
40 80602 Thornton
40 80817 Colorado Springs
40 80654 Thornton
39 80920 Colorado Springs
38 81633 Craig
38 81640 Craig
38 80202 Denver
37 80655 Wolcott
37 80101 Agate
36 80239 Denver
36 80403 Lakewood
36 80631 Greeley
36 81427 Ouray
36 80112 Aurora
35 81415 Montrose
35 80534 Fort Collins
34 80498 Breckenridge
33 80532 Fort Collins
33 81004 Pueblo
33 80132 Colorado Springs
32 80503 Fort Collins
32 80813 Woodland
32 81630 Grand Junction
32 80233 Thornton
31 80808 Colorado Springs
31 81624 Grand Junction
31 80731 Sterling
30 81152 San Luis
30 80819 Colorado Springs
29 81025 Pueblo
29 81041 Lamar
29 81055 La Veta
29 81226 Canon City
29 80129 Aurora
28 80215 Lakewood
28 80455 Boulder
28 80516 Boulder
28 80747 Sterling
28 80820 Guffey
28 81039 Pueblo
28 81141 Manassa
28 81637 Vail
28 81648 Rangely
28 80020 Lakewood
27 80102 Aurora
27 80220 Denver
27 80438 Idaho Springs
27 80480 Walden
27 80483 Steamboat Springs
27 80535 Fort Collins
27 80612 Fort Collins
27 81654 Aspen
27 81084 Lamar
26 81526 Grand Junction
26 81602 Glenwood Springs
26 81615 Aspen
26 80123 Denver
25 80401 Lakewood
25 80433 Lakewood
25 81130 Creede
25 81253 Pueblo
25 80204 Denver
24 80521 Fort Collins
24 80818 Genoa
24 80840 Colorado Springs
24 80901 Colorado Springs
24 82063 Fort Collins
24 80002 Lakewood
23 80103 Aurora
23 80105 Aurora
23 80206 Denver
23 80601 Thornton
23 80645 Greeley
23 80904 Colorado Springs
23 80907 Colorado Springs
23 80918 Colorado Springs
23 81504 Grand Junction
23 81647 Rifle
23 80010 Aurora
22 80018 Aurora
22 80106 Colorado Springs
22 80444 Idaho Springs
22 80466 Boulder
22 80515 Fort Collins
22 80528 Fort Collins
22 80547 Fort Collins
22 80759 Yuma
22 81007 Pueblo
22 81045 Haswell
22 81223 Canon City
22 81230 Gunnison
22 80005 Lakewood
21 80436 Idaho Springs
21 81003 Pueblo
21 81611 Aspen
21 81612 Aspen
21 80212 Denver
20 80440 Fairplay
20 80603 Thornton
20 80728 Sterling
20 81005 Pueblo
20 81022 Pueblo
20 81044 Hasty
20 81416 Montrose
20 81422 Montrose
20 80108 Castle Rock
19 80122 Aurora
19 80138 Castle Rock
19 80735 Idalia
19 81212 Canon City
19 81323 Dolores
19 81655 Vail
19 80014 Denver
18 80459 Winter Park
18 80463 Vail
18 80544 Boulder
18 80643 Thornton
18 80727 Eckley
18 81140 La Jara
18 81235 Lake City
18 81403 Montrose
18 81635 Grand Junction
18 80003 Lakewood
17 80124 Castle Rock
17 80126 Castle Rock
17 80130 Castle Rock
17 80131 Castle Rock
17 80427 Black Hawk
17 81224 Crested Butte
17 99999 No Real City
17 80110 Denver
16 80234 Thornton
16 80302 Boulder
16 80470 Lakewood
16 81124 Capulin
16 81133 Ft Garland
16 81324 Dove Creek
16 81326 Durango
16 81434 Delta
16 80023 Thornton
15 80107 Elizabeth
15 80128 Aurora
15 80216 Denver
15 80221 Denver
15 80640 Thornton
15 81090 Walsh
15 81155 Villa Grove
15 81620 Vail
15 80222 Denver
14 80476 Idaho Springs
14 80905 Colorado Springs
14 80909 Colorado Springs
14 81327 Dolores
14 81330 Dolores
14 81331 Dolores
14 81335 Dolores
14 81401 Montrose
14 81632 Vail
14 80224 Denver
13 80229 Thornton
13 80230 Denver
13 80231 Denver
13 80236 Denver
13 80241 Thornton
13 80247 Denver
13 80481 Boulder
13 80530 Greeley
13 80615 Greeley
13 80634 Greeley
13 80736 Sterling
13 80743 Otis
13 80832 Colorado Springs
13 80921 Colorado Springs
13 81057 Mcclave
13 80019 Thornton
12 80022 Thornton
12 80024 Thornton
12 80030 Thornton
12 80045 Thornton
12 80066 Woodland Park
12 80423 Vail
12 80425 Lakewood
12 80523 Fort Collins
12 80726 Sterling
12 80836 Stratton
12 80861 Vona
12 80923 Colorado Springs
12 81131 Crestone
12 81418 Delta
12 81658 Vail
12 80429 Climax
11 80468 Winter Park
11 80620 Greeley
11 80737 Julesburg
11 80741 Sterling
11 80742 Greeley
11 81063 Ordway
11 81132 Monte Vista
11 81148 Romeo
11 81501 Grand Junction
11 81521 Grand Junction
11 80015 Aurora
10 80017 Aurora
10 80113 Aurora
10 80121 Aurora
10 80448 Grant
10 80454 Lakewood
10 80520 Greeley
10 80543 Greeley
10 80610 Greeley
10 80822 Joes
10 80829 Colorado Springs
10 80925 Colorado Springs
10 81062 Olney Springs
10 81244 Canon City
10 80038 Broomfield
9 80226 Denver
9 80304 Boulder
9 80469 Steamboat Springs
9 80471 Boulder
9 80479 Steamboat Springs
9 80722 Sterling
9 80745 Sterling
9 80828 Limon
9 80913 Colorado Springs
9 81027 Branson
9 81222 Canon City
9 81507 Grand Junction
9 81643 Grand Junction
9 80004 Lakewood
8 80025 Boulder
8 80214 Denver
8 80227 Denver
8 80232 Denver
8 80235 Denver
8 80305 Boulder
8 80310 Boulder
8 80501 Boulder
8 80546 Greeley
8 80734 Holyoke
8 80801 Anton
8 80924 Colorado Springs
8 80928 Colorado Springs
8 81064 Pritchett
8 81087 Vilas
8 81410 Delta
8 81646 Grand Junction
8 80021 Lakewood
7 80308 Boulder
7 80447 Winter Park
7 80451 Winter Park
7 80514 Greeley
7 80649 Greeley
7 80650 Greeley
7 80651 Greeley
7 80914 Colorado Springs
7 81091 Weston
7 81121 Pagosa Springs
7 81146 Alamosa
7 81149 Saguache
7 81220 Montrose
7 81236 Nathrop
7 81642 Aspen
7 80127 Lakewood
6 80611 Greeley
6 80644 Greeley
6 80646 Greeley
6 80648 Greeley
6 80705 Fort Morgan
6 80821 Hugo
6 80915 Colorado Springs
6 80916 Colorado Springs
6 80917 Colorado Springs
6 81020 Aguilar
6 81157 Pagosa Springs
6 80007 Lakewood
5 80046 Aurora
5 80209 Denver
5 80419 Lakewood
5 80453 Lakewood
5 80457 Lakewood
5 80478 Winter Park
5 80497 Silverthorne
5 80542 Greeley
5 80622 Greeley
5 80623 Greeley
5 80624 Greeley
5 80652 Greeley
5 80653 Fort Morgan
5 80729 Greeley
5 80732 Greeley
5 80754 Greeley
5 80805 Bethune
5 80864 Colorado Springs
5 80911 Colorado Springs
5 80919 Colorado Springs
5 81128 Pagosa Springs
5 81233 Canon City
5 81402 Montrose
5 81522 Grand Junction
5 81649 Vail
5 82082 Greeley
5 80420 Alma
4 80720 Akron
4 80746 Paoli
4 80809 Colorado Springs
4 80823 Karval
4 80833 Colorado Springs
4 80834 Seibert
4 80835 Colorado Springs
4 80902 Colorado Springs
4 80910 Colorado Springs
4 80922 Colorado Springs
4 80927 Colorado Springs
4 80929 Colorado Springs
4 80930 Colorado Springs
4 80938 Colorado Springs
4 80939 Colorado Springs
4 80951 Colorado Springs
4 81049 Kim
4 81073 Springfield
4 81240 Canon City
4 81332 Rico
4 81527 Grand Junction
4 81645 Vail
4 80117 Kiowa
3 80163 Highlands Ranch
3 80203 Denver
3 80205 Denver
3 80211 Denver
3 80218 Denver
3 80219 Denver
3 80223 Denver
3 80238 Denver
3 80249 Denver
3 80264 Denver
3 80266 Denver
3 80290 Denver
3 80293 Denver
3 80294 Denver
3 80309 Boulder
3 80426 Vail
3 80449 Hartsel
3 80474 Black Hawk
3 80733 Fort Morgan
3 80802 Arapahoe
3 81052 Lamar
3 81076 Sugar City
3 81129 Conejos
3 81241 Pitkin
3 81242 Poncha Springs
3 81425 Montrose
3 81433 Silverton
3 81657 Vail
3 80160 Littleton
2 80422 Black Hawk
2 80437 Evergreen
2 80475 Shawnee
2 80723 Fort Morgan
2 80744 Ovid
2 80750 Fort Morgan
2 80807 Burlington
2 80815 Flagler
2 80826 Limon
2 81036 Eads
2 81077 La Junta
2 81125 Alamosa
2 81243 Powderhorn
2 81248 Sargents
2 81503 Grand Junction
2 81505 Grand Junction
2 81506 Grand Junction
2 81520 Grand Junction
2 81523 Grand Junction
2 81524 Grand Junction
2 81525 Grand Junction
2 80006 Arvada
1 80434 Cowdrey
1 80749 Sedgwick
1 80757 Woodrow
1 80810 Cheyenne Wells
1 81221 Canon City
1 81225 Mount Crested Butte
1 81232 Canon City
1 81411 Montrose
1