B72/100

Maine Tap Water Quality Rankings 2026

72 cities · 638,125 people served

Top Contaminant Concerns

Copper (90th percentile)PFOAPFOS

All Cities in Maine

#	City	Score	Population	Violations
1	Portland	A (91)	135,068	6
2	Poland	B (75)	89,184	123
3	Kennebunk	A (83)	35,663	10
4	Bangor	A (90)	27,298	3
5	Lisbon	B (61)	23,888	25
6	Lewiston	B (61)	23,720	5
7	Waterville	B (62)	22,060	12
8	Topsham	B (66)	18,250	27
9	Kittery	B (79)	14,478	14
10	Sanford	D (28)	14,328	10
11	Augusta	A (90)	13,750	3
12	York	A (88)	13,675	6
13	Richmond	D (38)	9,846	109
14	Bath	C (56)	9,290	9
15	Gardiner	C (57)	9,000	20
16	Brewer	B (72)	8,860	6
17	Boothbay	B (72)	8,448	8
18	Yarmouth	C (51)	8,000	10
19	Winterport	B (61)	7,691	40
20	Old Town	B (79)	7,648	6
21	Presque Isle	C (51)	6,128	10
22	Orono	C (40)	5,793	17
23	Belfast	B (63)	5,698	10
24	Houlton	A (83)	4,735	10
25	Hampden	A (86)	4,628	7
26	Bar Harbor	A (86)	4,443	3
27	Farmington	B (76)	4,050	9
28	Rumford	B (79)	4,050	10
29	Caribou	D (22)	3,943	18
30	Surry	F (15)	3,910	26
31	South Berwick	C (58)	3,722	14
32	Bridgton	B (66)	3,660	15
33	North Waterboro	B (69)	3,500	12
34	Norway	A (89)	3,100	3
35	Lincoln	B (73)	3,020	8
36	Livermore Falls	A (85)	2,995	4
37	South Paris	C (55)	2,940	10
38	Wilton	A (85)	2,800	9
39	Searsport	B (73)	2,763	27
40	Winthrop	C (46)	2,750	15
41	Madawaska	B (62)	2,738	10
42	Southwest Harbor	F (0)	2,480	93
43	Saco	F (0)	2,470	55
44	Gray	B (73)	2,468	8
45	Mexico	A (96)	2,425	1
46	Dover-Foxcroft	A (92)	2,400	8
47	Dexter	B (63)	2,338	10
48	Hallowell	A (100)	2,300	0
49	Van Buren	A (92)	2,190	5
50	Damariscotta	F (0)	2,143	70
51	East Millinocket	B (74)	2,133	7
52	Eastport	F (0)	2,125	47
53	Fort Fairfield	D (28)	2,025	21
54	Mechanic Falls	A (84)	2,010	5
55	Wiscasset	A (84)	1,970	9
56	Newport	F (0)	1,900	62
57	North Berwick	C (46)	1,825	35
58	Lubec	C (52)	1,775	13
59	Carrabassett Valley	F (0)	1,730	34
60	Milo	F (0)	1,720	67
61	Northeast Harbor	F (0)	1,623	32
62	Fort Kent	B (69)	1,578	12
63	Sabattus	A (86)	1,550	7
64	Sangerville	B (76)	1,535	9
65	Mars Hill	F (0)	1,500	110
66	Dixfield	C (50)	1,415	18
67	Machias	A (100)	1,390	0
68	Rangeley	B (61)	1,378	8
69	Jackman	F (0)	1,125	51
70	Norridgewock	D (39)	1,055	34
71	Howland	A (85)	1,025	12
72	Pittsfield	B (79)	1,013	6