B62/100

Wisconsin Tap Water Quality Rankings 2026

334 cities · 4,085,357 people served

Top Contaminant Concerns

Copper (90th percentile)PFOAPFOSPFHxSLead (90th percentile)

All Cities in Wisconsin

#	City	Score	Population	Violations
1	Milwaukee	A (83)	676,935	44
2	Madison	C (58)	284,899	212
3	Green Bay	D (24)	159,373	107
4	Racine	B (65)	128,723	74
5	Kenosha	A (80)	99,218	17
6	Appleton	B (66)	87,535	39
7	Waukesha	F (0)	70,718	381
8	Eau Claire	A (90)	70,587	3
9	Oshkosh	A (92)	66,935	8
10	Janesville	A (91)	64,415	2
11	West Allis	A (92)	63,240	5
12	Neenah	A (83)	56,433	18
13	Sheboygan	A (83)	54,527	16
14	La Crosse	B (76)	54,020	29
15	Wauwatosa	A (89)	49,064	4
16	Wausau	A (82)	46,392	7
17	Fond Du Lac	C (50)	45,349	112
18	De Pere	D (22)	38,660	89
19	Beloit	B (79)	36,677	10
20	Brookfield	F (19)	35,489	230
21	Manitowoc	A (96)	34,500	1
22	Sun Prairie	B (65)	33,966	24
23	Oak Creek	F (19)	32,104	58
24	West Bend	F (0)	31,752	71
25	Stevens Point	A (87)	28,460	8
26	New Berlin	F (0)	27,899	273
27	Superior	B (76)	26,084	9
28	Menomonee Falls	F (15)	25,663	174
29	Fitchburg	B (74)	24,500	23
30	Watertown	B (70)	23,945	7
31	Middleton	C (53)	23,868	32
32	Franklin	F (7)	22,500	54
33	Grand Chute	A (81)	21,583	8
34	South Milwaukee	B (71)	21,340	26
35	Menasha	A (87)	20,644	12
36	Germantown	F (0)	20,027	110
37	Wisconsin Rapids	B (79)	20,000	6
38	Marshfield	B (78)	18,815	4
39	Cudahy	B (62)	18,659	35
40	Onalaska	A (81)	18,000	3
41	Ashwaubenon	F (11)	17,730	18
42	Hudson	A (81)	17,635	8
43	Kaukauna	C (44)	17,493	14
44	Pewaukee	F (0)	16,837	151
45	Beaver Dam	A (90)	16,200	3
46	River Falls	A (91)	16,000	2
47	Weston	D (25)	16,000	53
48	Menomonie	F (0)	15,950	118
49	Hartford	D (36)	15,805	53
50	Oconomowoc	B (76)	15,805	9
51	Waunakee	A (90)	14,879	7
52	Greendale	A (86)	14,393	7
53	Shawano	A (80)	14,150	14
54	Baraboo	C (43)	14,117	94
55	Verona	A (84)	14,030	9
56	Whitewater	D (20)	14,000	41
57	Shorewood	A (83)	13,535	10
58	Plover	A (86)	13,486	3
59	Chippewa Falls	F (16)	13,375	69
60	Stoughton	A (92)	13,078	2
61	Glendale	A (94)	12,883	3
62	Port Washington	B (79)	12,853	14
63	Brown Deer	C (55)	12,741	22
64	Mequon	B (67)	12,652	43
65	Lake Geneva	C (51)	12,395	101
66	Fort Atkinson	B (63)	12,390	10
67	Oregon	A (80)	12,296	21
68	Grafton	F (0)	12,269	135
69	Platteville	B (69)	12,268	28
70	Little Chute	B (67)	12,168	23
71	Cedarburg	F (15)	11,800	67
72	Sussex	F (0)	11,750	309
73	Greenville	B (62)	11,340	31
74	Two Rivers	F (0)	11,270	80
75	Black River Falls	B (77)	11,048	35
76	Marinette	B (71)	10,968	15
77	New Richmond	C (50)	10,824	15
78	Monroe	B (70)	10,780	7
79	Pleasant Prairie	C (45)	10,754	24
80	Deforest	B (75)	10,500	6
81	Portage	F (11)	10,437	62
82	Elkhorn	F (0)	10,317	76
83	Plymouth	B (62)	10,164	36
84	Holmen	C (50)	10,147	35
85	Sparta	B (71)	10,025	10
86	Fort Mccoy	D (20)	10,000	61
87	Reedsburg	B (74)	9,984	26
88	Burlington	F (0)	9,958	111
89	Sturgeon Bay	B (78)	9,700	3
90	Mcfarland	A (86)	9,676	7
91	Merrill	F (0)	9,661	140
92	Altoona	F (0)	9,627	82
93	Cottage Grove	A (83)	9,345	6
94	Hartland	B (67)	9,212	6
95	Tomah	F (4)	9,192	24
96	Rice Lake	F (0)	9,012	37
97	Monona	A (89)	8,624	4
98	Delavan	B (64)	8,451	33
99	Rhinelander	F (5)	8,234	69
100	Mukwonago	F (0)	8,190	108
101	Sheboygan Falls	B (77)	8,165	8
102	Muskego	C (58)	8,150	31
103	Waupun	A (83)	8,056	6
104	Ashland	F (0)	8,000	65
105	Jefferson	D (32)	7,926	17
106	Jackson	A (82)	7,844	11
107	Antigo	B (65)	7,780	12
108	Mount Horeb	C (47)	7,756	46
109	Ripon	A (89)	7,716	4
110	Kimberly	A (81)	7,608	12
111	New London	F (0)	7,187	134
112	Kronenwetter	A (87)	6,931	6
113	Fox Point	A (88)	6,808	5
114	Lake Hallie	C (46)	6,701	19
115	Lake Mills	F (0)	6,211	55
116	Waupaca	C (58)	6,062	11
117	Prairie Du Chien	C (45)	6,005	27
118	Evansville	D (35)	5,703	18
119	Slinger	B (71)	5,659	10
120	Milton	B (69)	5,588	24
121	Hayward	C (51)	5,582	73
122	Berlin	F (13)	5,524	32
123	Edgerton	B (61)	5,512	12
124	Waterford	F (0)	5,368	131
125	Columbus	F (5)	5,173	60
126	Nekoosa	A (88)	5,169	9
127	Keshena	B (76)	5,122	37
128	Mayville	C (56)	5,112	13
129	Richland Center	A (88)	5,100	5
130	Lodi	B (66)	5,096	21
131	East Troy	B (73)	5,054	24
132	West Salem	A (89)	5,045	4
133	North Fond Du Lac	D (39)	5,014	34
134	Union Grove	D (39)	4,900	22
135	Suamico	A (82)	4,697	11
136	Clintonville	F (0)	4,635	67
137	Oconto	B (77)	4,610	8
138	Windsor	A (90)	4,607	3
139	Dodgeville	A (87)	4,583	2
140	Mauston	B (75)	4,456	6
141	Mosinee	A (83)	4,452	10
142	Baldwin	A (85)	4,440	4
143	Viroqua	A (81)	4,362	8
144	Oneida	B (66)	4,322	31
145	Medford	D (23)	4,318	74
146	Kewaskum	F (13)	4,309	79
147	Saukville	B (75)	4,268	2
148	Prescott	C (47)	4,258	18
149	Chilton	A (83)	4,191	6
150	Cross Plains	A (80)	4,100	5
151	Pell Lake	D (32)	4,071	53
152	Pulaski	A (93)	4,040	4
153	Prairie Du Sac	C (53)	4,006	12
154	Kiel	B (72)	3,932	10
155	Lancaster	B (74)	3,868	11
156	Marshall	B (73)	3,862	12
157	Wrightstown	B (63)	3,815	7
158	Arcadia	B (74)	3,737	23
159	Horicon	C (47)	3,682	14
160	Bloomer	F (0)	3,680	103
161	Hobart	B (72)	3,670	21
162	Omro	A (86)	3,629	4
163	Combined Locks	A (88)	3,609	8
164	Seymour	C (55)	3,601	26
165	Waterloo	B (64)	3,520	13
166	Sauk City	A (93)	3,518	4
167	Stanley	B (61)	3,500	28
168	Barron	F (0)	3,423	88
169	Peshtigo	F (0)	3,420	28
170	Johnson Creek	D (30)	3,318	39
171	Ellsworth	B (60)	3,304	13
172	Brillion	A (88)	3,262	5
173	Freedom	A (88)	3,260	5
174	Boscobel	B (78)	3,237	7
175	Wisconsin Dells	A (81)	3,232	8
176	Algoma	A (99)	3,219	0
177	Crandon	D (37)	3,218	232
178	Brodhead	A (95)	3,216	2
179	Rothschild	F (0)	3,190	86
180	Ladysmith	F (10)	3,184	27
181	Tomahawk	B (68)	3,180	9
182	Lac Du Flambeau	B (76)	3,168	9
183	Sherwood	F (9)	3,114	35
184	Oostburg	A (92)	3,110	5
185	Hortonville	D (37)	3,028	48
186	New Holstein	A (80)	3,012	13
187	Park Falls	F (9)	2,993	76
188	Amery	A (85)	2,962	11
189	Lake Delton	A (93)	2,914	4
190	Oconto Falls	A (87)	2,892	6
191	Somerset	B (63)	2,854	14
192	Kewaunee	B (65)	2,848	28
193	Bowler	A (86)	2,805	8
194	Genoa City	F (0)	2,766	91
195	Luxemburg	A (92)	2,737	5
196	Belleville	A (84)	2,712	5
197	Lomira	D (24)	2,701	45
198	Denmark	C (59)	2,684	14
199	Osceola	B (75)	2,680	14
200	Mondovi	B (70)	2,667	10
201	Spooner	C (47)	2,653	14
202	Juneau	C (57)	2,627	12
203	Williams Bay	C (49)	2,601	44
204	New Lisbon	C (47)	2,526	38
205	Poynette	C (57)	2,520	36
206	Deerfield	C (51)	2,510	10
207	Fennimore	A (85)	2,507	12
208	Abbotsford	F (15)	2,502	66
209	Winneconne	F (0)	2,502	35
210	Belgium	B (62)	2,493	27
211	Mineral Point	C (46)	2,487	30
212	Westby	B (78)	2,400	7
213	Neillsville	A (90)	2,384	7
214	Minocqua	A (82)	2,381	7
215	Dousman	C (48)	2,350	37
216	New Glarus	F (15)	2,348	81
217	Cumberland	B (64)	2,311	13
218	Walworth	B (69)	2,304	20
219	Washburn	C (55)	2,280	14
220	Wautoma	A (87)	2,280	10
221	Fredonia	B (78)	2,279	10
222	Kohler	A (85)	2,271	12
223	Darlington	B (65)	2,235	12
224	Cedar Grove	D (38)	2,213	51
225	Schofield	B (71)	2,205	18
226	Butler	B (77)	2,181	23
227	Pardeeville	B (64)	2,151	13
228	Cuba City	B (67)	2,141	9
229	Clinton	D (34)	2,119	59
230	North Prairie	F (11)	2,100	82
231	Bayfield	F (0)	2,080	129
232	St. Croix Falls	A (86)	2,079	3
233	Redgranite	A (88)	2,019	5
234	Eagle	F (0)	1,950	69
235	Chetek	F (0)	1,931	125
236	Somers	C (56)	1,930	37
237	Trempealeau	F (8)	1,888	72
238	Hammond	B (72)	1,884	8
239	New Franken	B (72)	1,875	9
240	Roberts	A (91)	1,872	2
241	Durand	A (95)	1,868	2
242	Port Edwards	C (53)	1,866	36
243	Weyauwega	D (32)	1,856	57
244	Spencer	A (80)	1,848	13
245	Adams	C (55)	1,847	14
246	Fontana	F (0)	1,839	101
247	Odanah	D (24)	1,839	69
248	Colby	A (88)	1,829	1
249	Campbellsport	C (45)	1,825	40
250	Whitehall	B (64)	1,820	29
251	Randolph	F (6)	1,800	63
252	Fall River	A (80)	1,793	5
253	Cameron	C (49)	1,787	12
254	Palmyra	C (54)	1,756	15
255	Mazomanie	A (89)	1,744	7
256	Osseo	A (80)	1,701	5
257	Marathon City	B (79)	1,695	10
258	Galesville	B (74)	1,679	11
259	Stratford	C (52)	1,643	37
260	Cambridge	F (10)	1,638	63
261	Thorp	F (0)	1,636	115
262	Spring Green	B (64)	1,626	25
263	Fox Lake	B (77)	1,610	8
264	Random Lake	A (89)	1,594	8
265	Darien	C (40)	1,573	49
266	Elkhart Lake	A (82)	1,567	3
267	Niagara	A (91)	1,561	6
268	Oxford	B (60)	1,550	33
269	Sharon	F (0)	1,549	93
270	Eagle River	A (91)	1,530	5
271	Brooklyn	B (73)	1,524	12
272	Cleveland	B (77)	1,524	12
273	Bangor	A (81)	1,520	4
274	Hurley	C (49)	1,515	16
275	Independence	D (26)	1,500	70
276	Black Earth	B (70)	1,493	11
277	Edgar	B (69)	1,491	19
278	Bonduel	A (93)	1,475	4
279	Orfordville	A (88)	1,475	9
280	Phillips	F (19)	1,473	74
281	Grantsburg	A (92)	1,460	5
282	Muscoda	F (19)	1,453	58
283	Augusta	F (15)	1,450	77
284	Mishicot	A (86)	1,432	3
285	Spring Valley	A (84)	1,409	8
286	Cornell	B (61)	1,390	12
287	Woodville	A (82)	1,386	7
288	Markesan	A (100)	1,365	0
289	Cadott	A (93)	1,352	4
290	Black Creek	A (94)	1,336	3
291	Elroy	B (64)	1,333	8
292	Montello	B (60)	1,329	13
293	Hillsboro	F (16)	1,325	25
294	Loyal	B (75)	1,308	9
295	Manawa	B (70)	1,300	11
296	Marion	A (96)	1,293	1
297	Webster	B (69)	1,281	31
298	Blair	D (33)	1,280	51
299	Fall Creek	D (32)	1,269	17
300	Gillett	A (86)	1,264	11
301	Theresa	F (0)	1,262	106
302	Barneveld	B (67)	1,258	10
303	Florence	A (96)	1,250	1
304	Iola	A (83)	1,249	6
305	Frederic	A (90)	1,241	7
306	King	A (90)	1,240	7
307	Shullsburg	A (95)	1,222	2
308	Monticello	A (91)	1,217	2
309	Reedsville	C (50)	1,200	19
310	Wittenberg	A (93)	1,200	4
311	Hazel Green	C (58)	1,193	15
312	Hilbert	A (81)	1,176	4
313	Princeton	F (0)	1,166	28
314	Luck	A (83)	1,150	2
315	Cashton	B (64)	1,120	9
316	Amherst	A (88)	1,119	5
317	Dane	A (83)	1,117	10
318	Colfax	A (86)	1,102	2
319	Glenwood City	A (96)	1,102	4
320	Strum	F (0)	1,100	111
321	Rio	B (76)	1,095	17
322	Greenwood	A (83)	1,079	9
323	Turtle Lake	B (61)	1,073	28
324	Dickeyville	B (77)	1,069	23
325	Hustisford	F (5)	1,063	36
326	Clear Lake	D (27)	1,061	66
327	Oakfield	A (91)	1,058	9
328	Boyceville	C (56)	1,043	36
329	Balsam Lake	B (70)	1,031	11
330	Crivitz	D (31)	1,026	58
331	Athens	D (29)	1,025	64
332	Albany	B (77)	1,018	8
333	Green Lake	C (49)	1,002	28
334	Bristol	B (61)	1,001	39