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Maine Water Quality Rankings

156 cities ranked · Data from EPA SDWIS

81.4
State avg score
156
Cities ranked
87%
A or B grade
3%
D or F grade
130
Health violations
16
PFAS detected
Analysis

Maine water quality overview

Maine's drinking water quality is good overall, with a state average score of 81.4 out of 100 — 6.9 points above the national average of 74.5. The median city score is 82.9, reflecting how water quality is distributed across the state's 156 ranked cities. 87% of Maine cities earned an A or B grade, indicating broadly strong water quality infrastructure. Only 1 city received a failing grade. PFAS "forever chemicals" were detected in 16 of 156 cities (10%). Of those, 10 cities exceed the 2024 EPA maximum contaminant levels — a health concern requiring action. 130 cities have recorded health-based violations with the EPA — meaning contaminant levels exceeded safe limits or required testing was missed. Use the table below to find your city's specific record.

Grade Distribution

How Maine cities scored

41%
46%
10%
A
64
41%
Excellent
B
72
46%
Good
C
15
10%
Fair
D
4
3%
Poor
F
1
1%
Failing
Score Distribution

Score distribution by range

63 32 0
1
3
2
14
38
63
35
0–9
10–19
20–29
30–39
40–49
50–59
60–69
70–79
80–89
90–100
Comparison

State vs national average

B+
Maine
81.4/100
B-
National avg
74.5/100
▲ 6.9 pts above national average
City Map

Water quality across Maine

Each dot is a city, colored by grade. Size reflects population served. Click any city to view its full report.

Highlights

Top & bottom cities in Maine

Best 10 cities

  1. 1 A+ Millinocket 97.6 5K
  2. 2 A+ York 97 14K
  3. 3 A+ Hallowell 97 2K
  4. 4 A+ Salem 96 900
  5. 5 A+ Searsport 95.4 3K
  6. 6 A+ Norway 95 2K
  7. 7 A Biddeford 94.3 43K
  8. 8 A Saco 94.3 43K
  9. 9 A East Millinocket 94 2K
  10. 10 A Cape Elizabeth 93.8 135K

Worst 10 cities

  1. 147 F Fairfield 36.4 22K
  2. 148 D Princeton 47 660
  3. 149 D Bridgton 48.1 4K
  4. 150 D Limestone 49.6 875
  5. 151 D+ Mars Hill 50 2K
  6. 152 C- Raymond 55.9 135K
  7. 153 C Brownville 61.1 916
  8. 154 C Vassalboro 63.8 22K
  9. 155 C Scarborough 63.8 135K
  10. 156 C Caribou 63.9 4K
Full Rankings

All 156 cities in Maine

# City Grade Score Score Population Violations Issues
1 Millinocket
A+
 97.6
5K 8 Health
2 York
A+
 97
14K 6
3 Hallowell
A+
 97
2K 0 Zero violations
4 Salem
A+
 96
900 0 Zero violations
5 Searsport
A+
 95.4
3K 28 Unresolved
6 Norway
A+
 95
2K 1
7 Biddeford
A
 94.3
43K 12 Health Unresolved
8 Saco
A
 94.3
43K 12 Health Unresolved
9 East Millinocket
A
 94
2K 7 Health Unresolved
10 Cape Elizabeth
A
 93.8
135K 7 Unresolved
11 Cumberland
A
 93.8
135K 7 Unresolved
12 Greenville
A
 93.7
1K 17 Health Unresolved
13 Madawaska
A
 93.6
3K 10 Health Unresolved
14 Dover-Foxcroft
A
 93.3
2K 9 Unresolved
15 Portland
A
 93.2
135K 7 Unresolved
16 Kennebunk
A
 93.2
36K 11 Health Unresolved
17 Kennebunkport
A
 93.2
36K 11 Health Unresolved
18 Falmouth
A
 92.8
135K 7 Unresolved
19 South Portland
A
 92.8
135K 7 Unresolved
20 Westbrook
A
 92.8
135K 7 Unresolved
21 Kittery
A
 92.8
14K 15 Health Unresolved
22 West Bath
A
 92.6
9K 10 Health Unresolved
23 Oxford
A
 92.5
1K 2 Health
24 Sabattus
A
 92.3
2K 26 Health Unresolved
25 Richmond
A
 92
1K 16 Health Unresolved
26 Norridgewock
A
 92
1K 35 Health Unresolved
27 Van Buren
A
 91.9
2K 7 Unresolved
28 Hiram
A
 91.6
1K 4 Unresolved
29 Parsonsfield
A
 91.6
1K 4 Unresolved
30 Porter
A
 91.6
1K 4 Unresolved
31 Cornish
A
 91.6
753 3 Unresolved
32 Baileyville
A
 91.5
2K 12 Health Unresolved
33 Bowdoinham
A
 90.9
738 1 Health
34 Howland
A
 90.7
1K 15 Unresolved
35 Lincoln
A
 90.4
3K 9 Health Unresolved
36 Mexico
A-
 89.7
2K 2 Unresolved
37 Old Town
A-
 89.6
8K 6 Health
38 Rockland
A-
 89.5
21K 7 Health Unresolved
39 Thomaston
A-
 89.5
21K 7 Health Unresolved
40 Strong
A-
 89.5
500 7 Unresolved
41 Warren
A-
 89.4
21K 8 Health Unresolved
42 Woolwich
A-
 88.7
9K 20 Health Unresolved
43 Milton
A-
 88.2
800 50 Health Unresolved
44 Chelsea
A-
 88.1
14K 4 Health Unresolved
45 Bar Harbor
A-
 87.6
4K 4 Health Unresolved
46 Ashland
A-
 87.2
713 25 Health Unresolved
47 Fryeburg
A-
 87
2K 9 Health Unresolved
48 Avon
A-
 86.8
650 31 Health Unresolved
49 Phillips
A-
 86.8
650 31 Health Unresolved
50 Dallas Plt
A-
 86.7
1K 9 Health Unresolved
51 Rangeley Plt
A-
 86.7
1K 9 Health Unresolved
52 Sandy River Plt
A-
 86.7
1K 9 Health Unresolved
53 Hartland
A-
 86.7
910 45 Health Unresolved
54 Boothbay
A-
 86.6
8K 9 Health Unresolved
55 Paris
A-
 86.6
3K 10 Health Unresolved
56 Rangeley
A-
 86.5
1K 11 Health Unresolved
57 Dixfield
A-
 86.4
1K 19 Health Unresolved
58 Winterport
A-
 86.3
763 6 Unresolved
59 Lewiston
A-
 86.2
24K 13 Health Unresolved
60 Brewer
A-
 86.2
9K 26 Health Unresolved
61 Winter Harbor
A-
 86.2
700 17 Health Unresolved
62 Lisbon
A-
 86
7K 14 Health PFAS Unresolved
63 Calais
A-
 86
3K 8 Health Unresolved
64 Bath
A-
 85
9K 31 Health Unresolved
65 Abbot
B+
 84.8
2K 10 Health Unresolved
66 Parkman
B+
 84.8
2K 10 Health Unresolved
67 Sangerville
B+
 84.8
2K 10 Health Unresolved
68 Rumford
B+
 84.6
4K 10 Unresolved
69 Auburn
B+
 84.5
17K 12 Health Unresolved
70 Harrison
B+
 84.4
863 11 Health Unresolved
71 Clinton
B+
 84.3
1K 7 Health Unresolved
72 Lubec
B+
 84.2
2K 16 Health Unresolved
73 Milton
B+
 84.2
800 98 Health Unresolved
74 Northport
B+
 83.8
6K 41 Health Unresolved
75 Mechanic Falls
B+
 83.8
2K 5 Unresolved
76 Bingham
B+
 83.5
1K 40 Health Unresolved
77 Manchester
B+
 83.3
14K 18 Health Unresolved
78 Newport
B+
 83
2K 63 Health Unresolved
79 South Berwick
B+
 82.9
4K 35 Health Unresolved
80 Washburn
B+
 82.9
688 40 Health Unresolved
81 Eagle Lake
B+
 82.9
585 43 Health Unresolved
82 Clifton
B+
 82.8
27K 11 Health Unresolved
83 Eddington
B+
 82.8
27K 11 Health Unresolved
84 North Yarmouth
B+
 82.7
8K 11 Health PFAS Unresolved
85 Yarmouth
B+
 82.7
8K 11 Health PFAS Unresolved
86 Kingfield
B+
 82.6
950 11 Health Unresolved
87 Augusta
B+
 82.4
14K 67 Health Unresolved
88 Machias
B+
 82.3
1K 11 Unresolved
89 Newcastle
B+
 82.2
2K 71 Health Unresolved
90 Veazie
B+
 81.7
27K 4 Health Unresolved
91 Winthrop
B+
 81.6
3K 56 Health Unresolved
92 Pittsfield
B+
 81.3
3K 22 Health Unresolved
93 Monmouth
B+
 81.3
588 13 Health Unresolved
94 Dexter
B+
 81
2K 10 Health Unresolved
95 Hampden
B+
 80.5
5K 11 Health Unresolved
96 Fort Fairfield
B+
 80.4
2K 22 Health Unresolved
97 Berwick
B+
 80.3
4K 77 Health Unresolved
98 Wilton
B+
 80.2
3K 10 Unresolved
99 Camden
B
 79.7
21K 42 Health Unresolved
100 Eastport
B
 79.6
2K 48 Health Unresolved
101 Perry
B
 79.6
2K 48 Health Unresolved
102 Waterville
B
 79.3
22K 15 Health PFAS Unresolved
103 Winslow
B
 79.3
22K 15 Health PFAS Unresolved
104 Limerick
B
 79.3
740 43 Health Unresolved
105 Gorham
B
 79.2
853 38 Health Unresolved
106 Milo
B
 78.5
2K 68 Health Unresolved
107 Orrington
B
 78.3
27K 35 Health Unresolved
108 Bethel
B
 78.2
2K 6 Unresolved
109 Indian Twp St Ind Rs
B
 78
535 113 Health Unresolved
110 Farmington
B
 77.9
4K 18 Health Unresolved
111 Anson
B
 77.5
6K 51 Health Unresolved
112 Embden
B
 77.5
6K 51 Health Unresolved
113 Madison
B
 77.5
6K 51 Health Unresolved
114 Ellsworth
B
 77.5
4K 27 Health Unresolved
115 North Haven
B
 77.1
740 171 Health Unresolved
116 Bangor
B
 76.5
27K 83 Health Unresolved
117 Charleston
B
 76.5
503 30 Health Unresolved
118 Waterboro
B
 75.2
4K 61 Health Unresolved
119 Jackman
B
 75
1K 52 Health Unresolved
120 Sanford
B-
 74.5
15K 55 Health PFAS Unresolved
121 Damariscotta
B-
 74.4
2K 115 Health Unresolved
122 Windham
B-
 74.1
135K 77 Health Unresolved
123 Oakland
B-
 74.1
22K 32 Health PFAS Unresolved
124 Wiscasset
B-
 74
2K 42 Health Unresolved
125 Guilford
B-
 73.7
2K 40 Health Unresolved
126 Rockport
B-
 73
21K 15 Health Unresolved
127 Belfast
B-
 73
6K 32 Health Unresolved
128 Gardiner
B-
 72.8
9K 22 Health Unresolved
129 Southwest Hbr
B-
 72.6
2K 94 Health Unresolved
130 Mount Desert
B-
 72.5
2K 49 Health Unresolved
131 Alfred
B-
 72.3
1K 62 Health Unresolved
132 Livermore
B-
 71.8
3K 6 Health Unresolved
133 North Berwick
B-
 70.5
2K 35 Health Unresolved
134 Gray
B-
 70.4
2K 10 Health Unresolved
135 Moscow
B-
 70.4
1K 60 Health Unresolved
136 Orono
B-
 70.2
6K 233 Health Unresolved
137 Vinalhaven
C+
 69.4
1K 46 Health Unresolved
138 West Paris
C+
 68.4
540 32 Health Unresolved
139 Hermon
C+
 68.2
27K 56 Health Unresolved
140 Topsham
C+
 67.5
19K 180 Health Unresolved
141 Carrabassett Vl
C+
 67.5
2K 35 Health Unresolved
142 Fort Kent
C+
 67.4
2K 46 Health Unresolved
143 Castine
C+
 67.3
1K 250 Health Unresolved
144 Jay
C+
 65.7
1K 54 Health Unresolved
145 Presque Isle
C+
 65.6
6K 81 Health Unresolved
146 Houlton
C
 64
5K 65 Health PFAS Unresolved
147 Caribou
C
 63.9
4K 284 Health Unresolved
148 Scarborough
C
 63.8
135K 162 Health Unresolved
149 Vassalboro
C
 63.8
22K 83 Health PFAS Unresolved
150 Brownville
C
 61.1
916 22 Health Unresolved
151 Raymond
C-
 55.9
135K 39 Health Unresolved
152 Mars Hill
D+
 50
2K 113 Health Unresolved
153 Limestone
D
 49.6
875 178 Health Unresolved
154 Bridgton
D
 48.1
4K 124 Health Unresolved
155 Princeton
D
 47
660 316 Health Unresolved
156 Fairfield
F
 36.4
22K 160 Health PFAS Unresolved
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