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Lead Contamination

Lead in Wisconsin Drinking Water

Ranked by 90th percentile lead level (ppb) · Data from EPA SDWIS & UCMR

441
Cities Tested
4
Exceeds Limit
1%
% Exceeds Limit
2.6 ppb
State Avg
▼ 1% vs national
vs National
383
Health Violations
Analysis

Lead in Wisconsin: what the data shows

Wisconsin has 441 cities with lead monitoring data, with very few cities exceeding the EPA action level of 15 ppb. The state average 90th percentile lead level is 2.6 ppb, compared to 3.3 ppb nationally — better than the national average. 4 cities exceed the 15 ppb action level. High lead levels in tap water typically indicate aging infrastructure — lead service lines, lead solder in older plumbing, or lead-containing brass fixtures. There is no safe level of lead exposure for children. The 90th percentile measurement means that 90% of tap samples in a city are at or below the reported level. This is the standard EPA uses under the Lead and Copper Rule to determine if a water system needs to take corrective action. An NSF 53-certified pitcher or under-sink filter can effectively remove lead at the tap.

Comparison

Cities exceeding 15 ppb EPA Action Level

Wisconsin
1%
4 of 441 cities
← ▼ 1% below national rate (better)
National avg
2%
352 of 15325 cities
City Map

Lead data across Wisconsin

Each dot is a city, colored by overall water quality grade. Cities with lead levels above the 15 ppb EPA action level are highlighted. Size reflects population served.

Worst Offenders

Top 10 cities by lead level in Wisconsin

Highest Lead levels (ppb)

  1. 1 C Mineral Point 37.0 ppb Yes 2K
  2. 2 C Argyle 26.0 ppb Yes 823
  3. 3 C+ Plymouth 21.8 ppb Yes 10K
  4. 4 C Williams Bay 16.0 ppb Yes 3K
  5. 5 F Elkhorn 14.0 ppb 10K
  6. 6 D+ Thorp 14.0 ppb 2K
  7. 7 B+ Cudahy 13.0 ppb 19K
  8. 8 C- Two Rivers 13.0 ppb 11K
  9. 9 B- Kimberly 13.0 ppb 8K
  10. 10 B+ Iola 12.0 ppb 1K
All Cities

All Wisconsin cities ranked by lead level

# City Level Level Exceeds? Violations Grade
1 Mineral Point 37.0 ppb
Yes 4
C
2 Argyle 26.0 ppb
Yes 2
C
3 Plymouth 21.8 ppb
Yes 8
C+
4 Williams Bay 16.0 ppb
Yes 1
C
5 Elkhorn 14.0 ppb
No 19
F
6 Thorp 14.0 ppb
No 3
D+
7 Cudahy 13.0 ppb
No 0
B+
8 Two Rivers 13.0 ppb
No 5
C-
9 Kimberly 13.0 ppb
No 1
B-
10 Iola 12.0 ppb
No 2
B+
11 Athens 12.0 ppb
No 1
B+
12 Somerset 11.5 ppb
No 10
B-
13 La Crosse 10.9 ppb
No 34
F
14 Oostburg 10.5 ppb
No 0
B+
15 Platteville 10.3 ppb
No 11
D+
16 Neenah 10.0 ppb
No 6
C+
17 Merrill 9.8 ppb
No 7
C-
18 North Fond Du Lac 9.1 ppb
No 6
B
19 Cedar Grove 8.9 ppb
No 2
A
20 Columbus 8.9 ppb
No 8
B
21 Little Chute 8.6 ppb
No 1
B+
22 Wauwatosa 8.4 ppb
No 1
B+
23 Marshfield 8.2 ppb
No 9
C-
24 Lomira 8.2 ppb
No 7
B+
25 Florence 8.1 ppb
No 4
D
26 Wisconsin Rapids 8.1 ppb
No 6
B-
27 Brillion 8.1 ppb
No 1
A
28 Fort Mccoy 8.0 ppb
No 4
B+
29 Manitowoc 7.7 ppb
No 0
B+
30 South Milwaukee 7.7 ppb
No 0
A-
31 Cedarburg 7.6 ppb
No 1
B+
32 Saukville 7.6 ppb
No 0
B
33 Greenville 7.5 ppb
No 1
A
34 Fox Point 7.4 ppb
No 0
B+
35 Rothschild 7.3 ppb
No 3
B+
36 West Bend 7.2 ppb
No 11
F
37 Markesan 7.1 ppb
No 0
B+
38 Madison 7.0 ppb
No 14
F
39 Brandon 6.9 ppb
No 6
A-
40 Mauston 6.8 ppb
No 17
F
41 Valders 6.8 ppb
No 3
A-
42 Oxford 6.7 ppb
No 2
B
43 Campbellsport 6.6 ppb
No 5
C+
44 Hartford 6.6 ppb
No 2
B+
45 Ashland 6.5 ppb
No 14
D+
46 Sauk City 6.4 ppb
No 0
A-
47 Walworth 6.3 ppb
No 8
B-
48 Cleveland 6.3 ppb
No 2
B
49 Camp Douglas 6.3 ppb
No 4
B
50 Shullsburg 6.1 ppb
No 0
A
51 Oshkosh 6.1 ppb
No 0
A
52 Fond Du Lac 6.1 ppb
No 51
F
53 Sister Bay 6.1 ppb
No 0
B+
54 Weyauwega 6.0 ppb
No 2
C-
55 Amherst 6.0 ppb
No 1
B
56 Deforest 6.0 ppb
No 4
B+
57 Superior 5.6 ppb
No 17
F
58 Windsor 5.5 ppb
No 1
A-
59 Pepin 5.3 ppb
No 13
D
60 Eau Claire 5.3 ppb
No 18
D+
61 Reeseville 4.9 ppb
No 3
B-
62 Somers 4.9 ppb
No 1
B+
63 Appleton 4.8 ppb
No 4
B+
64 Wausau 4.8 ppb
No 24
C
65 Cross Plains 4.8 ppb
No 3
A-
66 Whitefish Bay 4.7 ppb
No 0
B+
67 St Croix Falls 4.7 ppb
No 1
B+
68 Muskego 4.6 ppb
No 36
D
69 Lake Mills 4.6 ppb
No 11
C+
70 Richland Center 4.6 ppb
No 4
B-
71 Poynette 4.6 ppb
No 11
D
72 Washburn 4.6 ppb
No 7
B
73 Genoa City 4.6 ppb
No 15
B-
74 Beloit 4.5 ppb
No 2
B+
75 Kewaunee 4.5 ppb
No 1
A-
76 Cashton 4.5 ppb
No 6
A
77 Necedah 4.5 ppb
No 2
B+
78 Viroqua 4.4 ppb
No 2
A-
79 Black River Falls 4.4 ppb
No 11
D+
80 Linden 4.3 ppb
No 0
B+
81 Clayton 4.3 ppb
No 1
B-
82 Hartland 4.2 ppb
No 8
B
83 Cambria 4.2 ppb
No 2
A
84 Kenosha 4.1 ppb
No 11
D
85 Lake Geneva 4.0 ppb
No 24
C
86 Middleton 4.0 ppb
No 3
C+
87 Bowler 4.0 ppb
No 8
A-
88 Mellen 4.0 ppb
No 1
A
89 Eleva 4.0 ppb
No 5
D
90 Wausaukee 4.0 ppb
No 2
B
91 Belmont 4.0 ppb
No 3
B+
92 Waunakee 3.8 ppb
No 11
B-
93 Palmyra 3.8 ppb
No 5
A-
94 Potosi 3.8 ppb
No 16
C
95 Wisconsin Dells 3.7 ppb
No 18
F
96 Sun Prairie 3.6 ppb
No 4
A
97 Waupaca 3.6 ppb
No 3
B-
98 Manawa 3.6 ppb
No 2
B
99 Mercer 3.6 ppb
No 0
A
100 Jefferson 3.5 ppb
No 12
B
101 Ripon 3.5 ppb
No 1
B+
102 Clintonville 3.5 ppb
No 15
B
103 Abbotsford 3.5 ppb
No 2
B
104 Ridgeway 3.5 ppb
No 6
A-
105 Brookfield 3.4 ppb
No 32
C-
106 Adams 3.4 ppb
No 7
B+
107 Racine 3.3 ppb
No 4
C+
108 Caledonia 3.3 ppb
No 1
B
109 Mukwonago 3.3 ppb
No 27
D
110 Mayville 3.3 ppb
No 6
A-
111 Stratford 3.3 ppb
No 2
B+
112 Shorewood 3.2 ppb
No 1
A-
113 Pulaski 3.2 ppb
No 0
A-
114 Hillsboro 3.2 ppb
No 13
C+
115 Slinger 3.1 ppb
No 2
B
116 Fontana 3.1 ppb
No 8
B-
117 Dane 3.1 ppb
No 1
A
118 Whitelaw 3.1 ppb
No 1
B-
119 Deerfield 3.1 ppb
No 7
B
120 Mount Horeb 3.0 ppb
No 1
A
121 Milltown 3.0 ppb
No 5
A
122 Janesville 3.0 ppb
No 12
B
123 Hudson 2.9 ppb
No 4
B
124 Oneida 2.9 ppb
No 3
D
125 Crandon 2.9 ppb
No 8
D+
126 Oconto 2.9 ppb
No 3
A-
127 Plainfield 2.9 ppb
No 0
A
128 Verona 2.9 ppb
No 1
B+
129 Sturgeon Bay 2.9 ppb
No 8
B+
130 Galesville 2.8 ppb
No 3
C
131 Monona 2.8 ppb
No 1
A
132 Marion 2.8 ppb
No 0
A+
133 Iron Ridge 2.8 ppb
No 1
A-
134 Centuria 2.8 ppb
No 0
A-
135 Edgerton 2.8 ppb
No 17
D
136 Bloomer 2.7 ppb
No 11
B+
137 Hortonville 2.7 ppb
No 1
B+
138 Luxemburg 2.7 ppb
No 0
B+
139 Juneau 2.7 ppb
No 7
C+
140 Plain 2.7 ppb
No 2
B+
141 Wyocena 2.7 ppb
No 3
A
142 Neillsville 2.6 ppb
No 7
C+
143 Muscoda 2.6 ppb
No 5
A
144 North Prairie 2.6 ppb
No 1
B+
145 Port Edwards 2.6 ppb
No 2
A-
146 Reedsville 2.6 ppb
No 5
B+
147 Green Bay 2.5 ppb
No 74
D+
148 Monroe 2.5 ppb
No 9
A-
149 Fall Creek 2.5 ppb
No 20
B
150 Three Lakes 2.5 ppb
No 4
D+
151 New London 2.4 ppb
No 2
D+
152 Cambridge 2.4 ppb
No 8
B
153 West Allis 2.4 ppb
No 0
A-
154 Jackson 2.4 ppb
No 1
B+
155 Ellsworth 2.4 ppb
No 6
B+
156 Black Earth 2.4 ppb
No 4
A-
157 Greenleaf 2.4 ppb
No 2
A-
158 North Freedom 2.4 ppb
No 3
B+
159 Cottage Grove 2.3 ppb
No 2
A-
160 Fitchburg 2.3 ppb
No 0
A
161 Park Falls 2.3 ppb
No 1
A-
162 Cornell 2.3 ppb
No 6
A
163 Elmwood 2.3 ppb
No 2
B+
164 Coleman 2.3 ppb
No 3
A-
165 Withee 2.3 ppb
No 0
A
166 Suring 2.3 ppb
No 5
B-
167 Sheboygan 2.2 ppb
No 1
A-
168 Menomonie 2.2 ppb
No 30
F
169 Black Creek 2.2 ppb
No 0
A
170 Gillett 2.2 ppb
No 0
A
171 Union Grove 2.1 ppb
No 26
D
172 Bay City 2.1 ppb
No 3
A-
173 Sparta 2.1 ppb
No 2
B
174 Milwaukee 2.1 ppb
No 2
A
175 Menomonee Falls 2.1 ppb
No 6
B+
176 Mc Farland 2.1 ppb
No 1
A+
177 Lake Delton 2.1 ppb
No 2
A-
178 Webster 2.1 ppb
No 13
B+
179 Luck 2.1 ppb
No 1
A-
180 Adell 2.1 ppb
No 1
A-
181 Pittsville 2.1 ppb
No 1
A-
182 Boscobel 2.1 ppb
No 7
A-
183 Spooner 2.1 ppb
No 21
B
184 Oak Creek 2.0 ppb
No 5
B
185 Hayward 2.0 ppb
No 19
F
186 Stanley 2.0 ppb
No 2
A
187 King 2.0 ppb
No 0
B+
188 Clear Lake 2.0 ppb
No 1
A
189 Rib Lake 2.0 ppb
No 2
B+
190 Siren 2.0 ppb
No 9
A
191 Dresser 2.0 ppb
No 5
A
192 Montreal 2.0 ppb
No 10
B-
193 Arlington 2.0 ppb
No 7
B
194 Pell Lake 1.9 ppb
No 3
C
195 Arena 1.9 ppb
No 5
C-
196 Prescott 1.9 ppb
No 8
B+
197 Mishicot 1.9 ppb
No 0
B+
198 Barneveld 1.9 ppb
No 5
B
199 Prentice 1.9 ppb
No 5
B
200 Ettrick 1.9 ppb
No 1
A-
201 Arcadia 1.8 ppb
No 0
A+
202 Lancaster 1.8 ppb
No 3
A
203 Omro 1.8 ppb
No 1
A-
204 Ladysmith 1.8 ppb
No 18
D
205 Tomahawk 1.8 ppb
No 3
B
206 Bayfield 1.8 ppb
No 7
C
207 Turtle Lake 1.8 ppb
No 2
A+
208 Shiocton 1.8 ppb
No 1
A
209 Cascade 1.8 ppb
No 1
B+
210 Mosinee 1.8 ppb
No 15
F
211 Owen 1.8 ppb
No 5
C-
212 Eagle River 1.7 ppb
No 2
B-
213 Glendale 1.7 ppb
No 1
A-
214 Seymour 1.7 ppb
No 2
A-
215 Pardeeville 1.7 ppb
No 5
A
216 Fort Atkinson 1.7 ppb
No 14
A-
217 Fennimore 1.6 ppb
No 0
A
218 Evansville 1.6 ppb
No 25
C-
219 Prairie Du Sac 1.6 ppb
No 12
C+
220 Barron 1.6 ppb
No 1
B+
221 Bonduel 1.6 ppb
No 0
A-
222 Wonewoc 1.6 ppb
No 1
A
223 Boyd 1.6 ppb
No 3
A
224 Burlington 1.6 ppb
No 27
B-
225 Antigo 1.6 ppb
No 8
F
226 Rockland 1.5 ppb
No 1
A-
227 Freedom 1.5 ppb
No 1
A
228 Belleville 1.5 ppb
No 2
B+
229 Whitehall 1.5 ppb
No 2
B
230 Frederic 1.5 ppb
No 0
A-
231 Wittenberg 1.5 ppb
No 0
A+
232 Hatley 1.5 ppb
No 5
A
233 West Salem 1.5 ppb
No 3
B+
234 Milton 1.5 ppb
No 1
A
235 Westby 1.5 ppb
No 3
B
236 New Lisbon 1.4 ppb
No 3
B+
237 Sharon 1.4 ppb
No 6
C-
238 Rio 1.4 ppb
No 1
B+
239 St Nazianz 1.4 ppb
No 2
A
240 Prairie Du Chien 1.4 ppb
No 9
B
241 Wauzeka 1.3 ppb
No 0
A
242 Menasha 1.3 ppb
No 1
B+
243 Waterloo 1.3 ppb
No 5
A-
244 Belgium 1.3 ppb
No 2
A-
245 Randolph 1.3 ppb
No 7
B
246 Shell Lake 1.3 ppb
No 14
B+
247 Iron River 1.3 ppb
No 11
C+
248 Bangor 1.3 ppb
No 3
A-
249 Ontario 1.3 ppb
No 12
B+
250 Elm Grove 1.3 ppb
No 28
F
251 Osseo 1.2 ppb
No 1
A
252 Viola 1.2 ppb
No 0
B+
253 Bloomington 1.2 ppb
No 2
A+
254 Cumberland 1.2 ppb
No 5
A
255 Redgranite 1.2 ppb
No 1
A-
256 Cadott 1.2 ppb
No 0
A
257 Delafield 1.2 ppb
No 22
D
258 Rhinelander 1.1 ppb
No 5
B
259 Lone Rock 1.1 ppb
No 3
A-
260 Suamico 1.1 ppb
No 1
A
261 Odanah 1.1 ppb
No 2
D+
262 Princeton 1.1 ppb
No 22
B+
263 Birnamwood 1.1 ppb
No 2
A
264 Montfort 1.1 ppb
No 5
B
265 Franklin 1.0 ppb
No 10
B
266 Brodhead 1.0 ppb
No 0
A+
267 Grand Chute 1.0 ppb
No 2
A
268 Baldwin 1.0 ppb
No 2
A
269 Mondovi 1.0 ppb
No 5
B+
270 Roberts 1.0 ppb
No 1
A-
271 Balsam Lake 1.0 ppb
No 4
A
272 Allenton 1.0 ppb
No 2
A
273 Altoona 1.0 ppb
No 15
C+
274 Rice Lake 1.0 ppb
No 17
F
275 Darlington 1.0 ppb
No 5
A-
276 Benton 1.0 ppb
No 1
A
277 Cassville 1.0 ppb
No 7
B-
278 Minong 1.0 ppb
No 0
A
279 Sussex 0.9 ppb
No 70
D+
280 Colby 0.9 ppb
No 0
A-
281 Marinette 0.9 ppb
No 0
A-
282 Winneconne 0.9 ppb
No 17
C
283 Fall River 0.9 ppb
No 3
B+
284 Gresham 0.9 ppb
No 5
B
285 Blue Mounds 0.9 ppb
No 3
A-
286 Brown Deer 0.9 ppb
No 5
A
287 Stetsonville 0.9 ppb
No 6
C+
288 Darien 0.9 ppb
No 2
A
289 Pleasant Prairie 0.9 ppb
No 7
B+
290 Livingston 0.9 ppb
No 5
A
291 Waupun 0.9 ppb
No 22
C+
292 Tigerton 0.9 ppb
No 1
B
293 Eagle 0.9 ppb
No 27
B+
294 Lena 0.8 ppb
No 3
B+
295 Hilbert 0.8 ppb
No 3
A
296 Bruce 0.8 ppb
No 6
A
297 Peshtigo 0.8 ppb
No 18
A-
298 Johnson Creek 0.8 ppb
No 7
C
299 Kohler 0.8 ppb
No 0
A-
300 Strum 0.8 ppb
No 5
B+
301 Phelps 0.8 ppb
No 2
A-
302 Chilton 0.8 ppb
No 8
B+
303 Glidden 0.8 ppb
No 3
B+
304 Brooklyn 0.8 ppb
No 3
A
305 New Holstein 0.8 ppb
No 2
A-
306 Kiel 0.8 ppb
No 3
A-
307 Kronenwetter 0.8 ppb
No 1
B+
308 Weston 0.8 ppb
No 0
B+
309 Green Lake 0.8 ppb
No 5
B-
310 Wabeno 0.8 ppb
No 1
A
311 Grafton 0.7 ppb
No 12
C+
312 Spring Green 0.7 ppb
No 14
C
313 Niagara 0.7 ppb
No 0
A-
314 Lac Du Flambeau 0.7 ppb
No 1
A
315 Orfordville 0.7 ppb
No 0
A
316 Dodgeville 0.7 ppb
No 5
A-
317 Denmark 0.7 ppb
No 4
B
318 Theresa 0.7 ppb
No 3
B
319 Stoughton 0.7 ppb
No 4
B+
320 East Troy 0.7 ppb
No 1
B
321 West Baraboo 0.7 ppb
No 0
A-
322 Bristol 0.7 ppb
No 10
B
323 Woodville 0.7 ppb
No 2
A-
324 Colfax 0.6 ppb
No 2
B
325 Spencer 0.6 ppb
No 1
B+
326 Friendship 0.6 ppb
No 4
B
327 Stevens Point 0.6 ppb
No 14
C+
328 Waukesha 0.6 ppb
No 320
D
329 Albany 0.6 ppb
No 3
A-
330 Berlin 0.6 ppb
No 13
A
331 Elkhart Lake 0.5 ppb
No 3
A
332 Merrimac 0.5 ppb
No 6
B+
333 Random Lake 0.5 ppb
No 0
A-
334 Chetek 0.5 ppb
No 6
C+
335 Medford 0.5 ppb
No 9
C+
336 Brownsville 0.5 ppb
No 8
B+
337 Sullivan 0.5 ppb
No 0
A
338 Oconomowoc 0.5 ppb
No 13
B
339 Ixonia 0.5 ppb
No 16
D+
340 Mequon 0.5 ppb
No 21
F
341 Lodi 0.5 ppb
No 20
B-
342 Star Prairie 0.4 ppb
No 4
A
343 Clinton 0.4 ppb
No 4
B-
344 Hustisford 0.4 ppb
No 14
A
345 Marathon City 0.4 ppb
No 2
B
346 Germantown 0.4 ppb
No 8
B-
347 Waldo 0.3 ppb
No 1
A-
348 Nekoosa 0.3 ppb
No 4
A-
349 New Berlin 0.3 ppb
No 14
B
350 Marshall 0.3 ppb
No 3
A
351 Greendale 0.3 ppb
No 1
A-
352 Hurley 0.3 ppb
No 8
B+
353 Chippewa Falls 0.3 ppb
No 12
D+
354 Osceola 0.3 ppb
No 8
B
355 Oregon 0.3 ppb
No 12
D+
356 Crivitz 0.3 ppb
No 2
A-
357 Hobart 0.3 ppb
No 2
B-
358 Monticello 0.3 ppb
No 1
B+
359 Minocqua 0.2 ppb
No 4
C-
360 Hales Corners 0.2 ppb
No 6
C+
361 Merrillan 0.2 ppb
No 1
B+
362 Dousman 0.2 ppb
No 12
C
363 Wautoma 0.2 ppb
No 0
A
364 Shawano 0.2 ppb
No 11
A
365 Beaver Dam 0.1 ppb
No 11
A-
366 Phillips 0.1 ppb
No 3
B
367 De Pere 0.0 ppb
No 38
B
368 Watertown 0.0 ppb
No 10
D
369 Onalaska 0.0 ppb
No 2
A-
370 Kaukauna 0.0 ppb
No 9
B+
371 Pewaukee 0.0 ppb
No 71
F
372 River Falls 0.0 ppb
No 14
C+
373 Whitewater 0.0 ppb
No 22
C+
374 Plover 0.0 ppb
No 9
B+
375 Port Washington 0.0 ppb
No 6
B+
376 Baraboo 0.0 ppb
No 0
B
377 Portage 0.0 ppb
No 9
B
378 New Richmond 0.0 ppb
No 15
B
379 Holmen 0.0 ppb
No 5
B-
380 Reedsburg 0.0 ppb
No 1
B+
381 Tomah 0.0 ppb
No 18
B+
382 Delavan 0.0 ppb
No 6
F
383 Sheboygan Falls 0.0 ppb
No 5
B-
384 Keshena 0.0 ppb
No 6
C+
385 Waterford 0.0 ppb
No 13
B
386 Kewaskum 0.0 ppb
No 0
A
387 Wrightstown 0.0 ppb
No 4
B
388 Horicon 0.0 ppb
No 10
B+
389 Combined Locks 0.0 ppb
No 1
B
390 Algoma 0.0 ppb
No 2
A-
391 Sherwood 0.0 ppb
No 12
B-
392 Amery 0.0 ppb
No 1
B
393 Oconto Falls 0.0 ppb
No 4
B+
394 New Glarus 0.0 ppb
No 1
A-
395 Fredonia 0.0 ppb
No 3
A
396 Schofield 0.0 ppb
No 2
B
397 Butler 0.0 ppb
No 0
A-
398 Cuba City 0.0 ppb
No 4
B
399 New Franken 0.0 ppb
No 4
A-
400 Trempealeau 0.0 ppb
No 5
A
401 Hammond 0.0 ppb
No 5
A
402 Durand 0.0 ppb
No 0
A
403 Cameron 0.0 ppb
No 10
B+
404 Mazomanie 0.0 ppb
No 1
B+
405 Fox Lake 0.0 ppb
No 6
B
406 Grantsburg 0.0 ppb
No 0
B+
407 Independence 0.0 ppb
No 1
A
408 Edgar 0.0 ppb
No 1
B+
409 Augusta 0.0 ppb
No 2
D+
410 Spring Valley 0.0 ppb
No 2
A-
411 Elroy 0.0 ppb
No 5
A-
412 Hazel Green 0.0 ppb
No 14
F
413 Montello 0.0 ppb
No 9
B-
414 Loyal 0.0 ppb
No 2
A-
415 Blair 0.0 ppb
No 2
A-
416 Laona 0.0 ppb
No 19
D+
417 Glenwood City 0.0 ppb
No 0
A-
418 Greenwood 0.0 ppb
No 2
A-
419 Dickeyville 0.0 ppb
No 0
B+
420 Oakfield 0.0 ppb
No 0
A
421 Elk Mound 0.0 ppb
No 4
B+
422 Boyceville 0.0 ppb
No 2
A-
423 Highland 0.0 ppb
No 2
A
424 Dorchester 0.0 ppb
No 1
B+
425 Footville 0.0 ppb
No 1
A-
426 Blanchardville 0.0 ppb
No 0
A
427 Stoddard 0.0 ppb
No 7
B+
428 Alma 0.0 ppb
No 0
A-
429 Coon Valley 0.0 ppb
No 2
B+
430 La Farge 0.0 ppb
No 0
A
431 Almena 0.0 ppb
No 0
A
432 Norwalk 0.0 ppb
No 1
A
433 Stockbridge 0.0 ppb
No 1
B+
434 Avoca 0.0 ppb
No 2
B+
435 Soldiers Grove 0.0 ppb
No 3
A
436 South Wayne 0.0 ppb
No 13
A-
437 Land O Lakes 0.0 ppb
No 7
C-
438 Kieler 0.0 ppb
No 1
B+
439 New Auburn 0.0 ppb
No 13
A
440 Warrens 0.0 ppb
No 6
A-
441 Melrose 0.0 ppb
No 4
A
FAQ

Frequently asked questions about lead in Wisconsin

Is lead in Wisconsin tap water a concern?

Yes — 4 of 441 cities with lead data exceed the EPA action level of 15 ppb. The state average is 2.6 ppb. Even below the action level, lead poses health risks especially for children and pregnant women. If your home was built before 1986, consider testing your tap water directly.

How can I reduce lead exposure from Wisconsin tap water?

Use an NSF 53-certified water filter, which is specifically certified to reduce lead. Run your cold tap for 30 seconds before drinking or cooking, especially if water has been sitting in pipes for hours. Never use hot tap water for cooking or making baby formula, as heat increases lead leaching from pipes.

Which Wisconsin cities have the highest lead levels?

The cities with the highest 90th percentile lead levels in Wisconsin are: Mineral Point (37.0 ppb), Argyle (26.0 ppb), Plymouth (21.8 ppb), Williams Bay (16.0 ppb), Elkhorn (14.0 ppb). See the full ranked table above.

More contaminants

Other contaminants in Wisconsin

PFAS in Wisconsin
Ranked by compounds detected
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Copper in Wisconsin
Ranked by 90th percentile level (mg/L)
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HAA5 in Wisconsin
Ranked by average concentration (µg/L)
→
Chromium-6 in Wisconsin
Ranked by max detected (µg/L)
→
Arsenic in Wisconsin
Ranked by violation count
→
Nitrate in Wisconsin
Ranked by violation count
→
Strontium in Wisconsin
Ranked by max detected (µg/L)
→
1,4-Dioxane in Wisconsin
Ranked by max detected (µg/L)
→
Manganese in Wisconsin
Ranked by max detected (µg/L)
→
Vanadium in Wisconsin
Ranked by max detected (µg/L)
→
Chlorate in Wisconsin
Ranked by max detected (µg/L)
→
Molybdenum in Wisconsin
Ranked by max detected (µg/L)
→
Cobalt in Wisconsin
Ranked by max detected (µg/L)
→
Lithium in Wisconsin
Ranked by max detected (µg/L)
→
NDMA in Wisconsin
Ranked by max detected (ng/L)
→
Perchlorate in Wisconsin
Ranked by max detected (µg/L)
→
All states

Lead in drinking water by state

AlabamaAlaskaArizonaArkansasCaliforniaColoradoConnecticutDelawareDistrict of ColumbiaFloridaGeorgiaHawaiiIdahoIllinoisIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachusettsMichiganMinnesotaMississippiMissouriMontanaNebraskaNevadaNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaNorth DakotaOhioOklahomaOregonPennsylvaniaRhode IslandSouth CarolinaSouth DakotaTennesseeTexasUtahVermontVirginiaWashingtonWest VirginiaWisconsinWyoming
← Lead contamination overview Explore Wisconsin water quality → National Lead map →