Water Quality in Connecticut
EPA violation data for public water systems across Connecticut.
360
ZIP Codes
9,081
Total Violations
72 (20%)
ZIPs with 0 Violations
25.2
Avg per ZIP
National avg: 18.87 violations per ZIP.
Connecticut is 34% above average.
Violation Map
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0
1-5
6-15
16+
EPA violations (5yr)
Most Affected Areas in Connecticut
All ZIP Codes in Connecticut (360)
06776 New Milford
641 06804 Shelton
252 06812 Shelton
220 06877 Shelton
200 06470 Shelton
154 06419 Middletown
152 06811 Shelton
139 06405 New Haven
129 06801 Shelton
124 06831 Shelton
122 06424 Middletown
117 06810 Shelton
110 06790 Torrington
109 06791 Harwinton
109 06612 Shelton
105 06043 Mansfield
104 06883 Shelton
102 06255 North Grosvenordale
95 06757 Kent
94 06237 Mansfield
91 06777 New Preston
87 06109 Hartford
86 06488 New Haven
86 06410 New Haven
85 06074 Hartford
83 06357 Norwich
81 06763 Morris
81 06277 Thompson
78 06371 Norwich
78 06016 Hartford
77 06907 Shelton
77 06033 Hartford
76 06019 Hartford
71 06069 Sharon
70 06437 New Haven
70 06484 Shelton
70 06423 Middletown
66 06278 Ashford
65 06897 Shelton
64 06037 Hartford
63 06455 Middletown
63 06793 Washington
62 06268 Mansfield
61 06281 Woodstock
61 06468 Shelton
59 06351 Norwich
58 06249 Norwich
56 06492 New Haven
56 06259 Pomfret Center
55 06489 Hartford
54 06378 Norwich
53 06881 Westport
52 06478 New Haven
51 06359 Norwich
50 06029 Mansfield
49 06480 Middletown
48 06756 Goshen
48 06422 Middletown
47 06035 Hartford
46 06084 Mansfield
46 06750 Bantam
46 06238 Mansfield
45 06902 Shelton
45 06057 New Hartford
44 06469 Middletown
44 06795 Watertown
44 06473 New Haven
43 06241 Dayville
42 06279 Mansfield
42 06457 Middletown
42 06482 Shelton
42 06260 Putnam
41 06752 Bridgewater
41 06524 New Haven
40 06716 New Haven
40 06896 Shelton
39 06903 Shelton
39 06002 Hartford
38 06880 Shelton
37 06234 Brooklyn
36 06082 Hartford
35 06840 Shelton
35 06905 Shelton
34 06754 Warren
32 06794 Washington
32 06798 Woodbury
32 06415 Middletown
31 06829 Georgetown
31 06103 Hartford
30 06420 Middletown
30 06098 Winchester
29 06248 Mansfield
29 06447 Hartford
29 06525 New Haven
29 06710 New Haven
29 06784 Shelton
29 06040 Hartford
28 06042 Hartford
28 06518 New Haven
28 06759 Litchfield
28 06070 Hartford
27 06340 Norwich
27 06382 Norwich
27 06762 New Haven
27 06783 Roxbury
27 06355 Norwich
26 06796 West Cornwall
25 06334 Norwich
24 06360 Norwich
24 06712 New Haven
24 06088 Hartford
23 06243 East Killingly
23 06385 Norwich
23 06850 Shelton
23 06010 Hartford
22 06066 Mansfield
22 06374 Plainfield
22 06443 New Haven
22 06232 Mansfield
21 06331 Norwich
21 06472 New Haven
21 06516 New Haven
21 06830 Shelton
21 06001 Hartford
20 06108 Hartford
20 06751 Bethlehem
20 06093 Hartford
19 06106 Hartford
19 06111 Hartford
19 06354 Moosup
19 06370 Norwich
19 06755 Gaylordsville
19 06825 Shelton
19 06226 Mansfield
18 06412 Middletown
18 06063 Barkhamsted
17 06254 Norwich
17 06414 Middletown
17 06611 Shelton
17 06031 Falls Village
16 06032 Hartford
16 06039 Lakeville
16 06076 Mansfield
16 06438 Middletown
16 06401 New Haven
15 06413 Clinton
15 06450 New Haven
15 06477 New Haven
15 06483 New Haven
15 06511 New Haven
15 06250 Mansfield
14 06258 Pomfret
14 06335 Norwich
14 06384 Norwich
14 06481 Middletown
14 06770 New Haven
14 06018 North Canaan
13 06068 Salisbury
13 06280 Windham
13 06418 New Haven
13 06451 New Haven
13 06460 New Haven
13 06705 New Haven
13 06026 Hartford
12 06050 New Britain
12 06078 Hartford
12 06320 Norwich
12 06408 Monroe
12 06512 New Haven
12 06513 New Haven
12 06085 Hartford
11 06118 Hartford
11 06206 East Granby
11 06403 New Haven
11 06441 Middletown
11 06461 New Haven
11 06471 New Haven
11 06510 New Haven
11 06514 New Haven
11 06515 New Haven
11 06517 New Haven
11 06519 New Haven
11 06702 New Haven
11 06704 New Haven
11 06706 New Haven
11 06708 New Haven
11 06023 Hartford
10 06081 Hartford
10 06117 Hartford
10 06239 Danielson
10 06338 Norwich
10 06614 Shelton
10 06875 Redding
10 06417 Middletown
9 06779 Oakville
9 06235 Chaplin
8 06264 Scotland
8 06330 Norwich
8 06416 Middletown
8 06491 Stevenson
8 06062 Hartford
7 06067 Hartford
7 06071 Mansfield
7 06073 Hartford
7 06131 Newington
7 06498 Middletown
7 06785 South Kent
7 06878 Shelton
7 06027 Hartford
6 06107 Hartford
6 06231 Mansfield
6 06242 Mansfield
6 06262 Quinebaug
6 06332 Central Village
6 06426 Middletown
6 06475 Middletown
6 06607 Shelton
6 06824 Shelton
6 06851 Shelton
6 06058 Norfolk
5 06267 South Woodstock
5 06339 Norwich
5 06365 Norwich
5 06053 Hartford
4 06092 Hartford
4 06095 Hartford
4 06377 Sterling
4 06604 Shelton
4 06605 Shelton
4 06606 Shelton
4 06608 Shelton
4 06610 Shelton
4 06615 Shelton
4 06807 Shelton
4 06813 Danbury
4 06820 Shelton
4 06853 Shelton
4 06854 Shelton
4 06855 Shelton
4 06870 Shelton
4 06890 Shelton
4 06901 Shelton
4 06906 Shelton
4 05385 Waterford
3 06013 Hartford
3 06060 Hartford
3 06110 Hartford
3 06112 Hartford
3 06247 Hampton
3 06409 Middletown
3 06442 Middletown
3 06456 Middletown
3 06459 Middletown
3 06787 Thomaston
3 06020 Hartford
2 06021 Colebrook
2 06022 Hartford
2 06051 Hartford
2 06052 Hartford
2 06059 Hartford
2 06065 Hartford
2 06080 Hartford
2 06089 Hartford
2 06090 Hartford
2 06091 Hartford
2 06096 Hartford
2 06105 Hartford
2 06114 Hartford
2 06119 Hartford
2 06120 Hartford
2 06333 Norwich
2 06373 Oneco
2 06375 Norwich
2 06444 Hartford
2 06467 Hartford
2 06479 Hartford
2 06778 Northfield
2 06025 Glastonbury
1 06083 Enfield
1 06263 Rogers
1 06282 Woodstock
1 06324 Brooklyn
1 06379 Norwich
1 06432 Fairfield
1 06571 Old Lyme
1 06782 Plymouth
1 06852 Norwalk
1 06876 Redding Ridge
1