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Lead Contamination

Lead in Wisconsin Drinking Water

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

446
Cities Tested
4
Exceeds Limit
1%
% Exceeds Limit
2.6 ppb
State Avg
▼ 1% vs national
vs National
388
Health Violations
Analysis

Lead in Wisconsin: what the data shows

Wisconsin has 446 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 446 cities
← ▼ 1% below national rate (better)
National avg
2%
378 of 15681 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 12K
  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 Twin Lakes 5.7 ppb
No 29
F
58 Superior 5.6 ppb
No 17
F
59 Windsor 5.5 ppb
No 1
A-
60 Pepin 5.3 ppb
No 13
D
61 Eau Claire 5.3 ppb
No 18
D+
62 Reeseville 4.9 ppb
No 3
B-
63 Somers 4.9 ppb
No 1
B+
64 Appleton 4.8 ppb
No 4
B+
65 Wausau 4.8 ppb
No 24
C
66 Cross Plains 4.8 ppb
No 3
A-
67 Whitefish Bay 4.7 ppb
No 0
B+
68 St Croix Falls 4.7 ppb
No 1
B+
69 Muskego 4.6 ppb
No 36
D
70 Lake Mills 4.6 ppb
No 11
C+
71 Richland Center 4.6 ppb
No 4
B-
72 Poynette 4.6 ppb
No 11
D
73 Washburn 4.6 ppb
No 7
B
74 Genoa City 4.6 ppb
No 15
B-
75 Beloit 4.5 ppb
No 2
B+
76 Kewaunee 4.5 ppb
No 1
A-
77 Cashton 4.5 ppb
No 6
A
78 Necedah 4.5 ppb
No 2
B+
79 Viroqua 4.4 ppb
No 2
A-
80 Black River Falls 4.4 ppb
No 11
D+
81 Linden 4.3 ppb
No 0
B+
82 Clayton 4.3 ppb
No 1
B-
83 Hartland 4.2 ppb
No 8
B
84 Cambria 4.2 ppb
No 2
A
85 Kenosha 4.1 ppb
No 11
D
86 Lake Geneva 4.0 ppb
No 24
C
87 Middleton 4.0 ppb
No 3
C+
88 Bowler 4.0 ppb
No 8
A-
89 Mellen 4.0 ppb
No 1
A
90 Eleva 4.0 ppb
No 5
D
91 Wausaukee 4.0 ppb
No 2
B
92 Belmont 4.0 ppb
No 3
B+
93 Waunakee 3.8 ppb
No 11
B-
94 Palmyra 3.8 ppb
No 5
A-
95 Potosi 3.8 ppb
No 16
C
96 Wisconsin Dells 3.7 ppb
No 18
F
97 Sun Prairie 3.6 ppb
No 4
A
98 Waupaca 3.6 ppb
No 3
B-
99 Manawa 3.6 ppb
No 2
B
100 Mercer 3.6 ppb
No 0
A
101 Jefferson 3.5 ppb
No 12
B
102 Ripon 3.5 ppb
No 1
B+
103 Clintonville 3.5 ppb
No 15
B
104 Abbotsford 3.5 ppb
No 2
B
105 Ridgeway 3.5 ppb
No 6
A-
106 Brookfield 3.4 ppb
No 32
C-
107 Adams 3.4 ppb
No 7
B+
108 Racine 3.3 ppb
No 4
C+
109 Caledonia 3.3 ppb
No 1
B
110 Mukwonago 3.3 ppb
No 27
D
111 Mayville 3.3 ppb
No 6
A-
112 Stratford 3.3 ppb
No 2
B+
113 Shorewood 3.2 ppb
No 1
A-
114 Pulaski 3.2 ppb
No 0
A-
115 Hillsboro 3.2 ppb
No 13
C+
116 Slinger 3.1 ppb
No 2
B
117 Fontana 3.1 ppb
No 8
B-
118 Dane 3.1 ppb
No 1
A
119 Whitelaw 3.1 ppb
No 1
B-
120 Deerfield 3.1 ppb
No 7
B
121 Mount Horeb 3.0 ppb
No 1
A
122 Milltown 3.0 ppb
No 5
A
123 Janesville 3.0 ppb
No 12
B
124 Hudson 2.9 ppb
No 4
B
125 Oneida 2.9 ppb
No 3
D
126 Crandon 2.9 ppb
No 8
D+
127 Oconto 2.9 ppb
No 3
A-
128 Plainfield 2.9 ppb
No 0
A
129 Verona 2.9 ppb
No 1
B+
130 Sturgeon Bay 2.9 ppb
No 8
B+
131 Galesville 2.8 ppb
No 3
C
132 Monona 2.8 ppb
No 1
A
133 Marion 2.8 ppb
No 0
A+
134 Iron Ridge 2.8 ppb
No 1
A-
135 Centuria 2.8 ppb
No 0
A-
136 Edgerton 2.8 ppb
No 17
D
137 Bloomer 2.7 ppb
No 11
B+
138 Hortonville 2.7 ppb
No 1
B+
139 Luxemburg 2.7 ppb
No 0
B+
140 Juneau 2.7 ppb
No 7
C+
141 Plain 2.7 ppb
No 2
B+
142 Wyocena 2.7 ppb
No 3
A
143 Neillsville 2.6 ppb
No 7
C+
144 Muscoda 2.6 ppb
No 5
A
145 North Prairie 2.6 ppb
No 1
B+
146 Port Edwards 2.6 ppb
No 2
A-
147 Reedsville 2.6 ppb
No 5
B+
148 Green Bay 2.5 ppb
No 74
D+
149 Monroe 2.5 ppb
No 9
A-
150 Fall Creek 2.5 ppb
No 20
B
151 Three Lakes 2.5 ppb
No 4
D+
152 New London 2.4 ppb
No 2
D+
153 Cambridge 2.4 ppb
No 8
B
154 West Allis 2.4 ppb
No 0
A-
155 Jackson 2.4 ppb
No 1
B+
156 Ellsworth 2.4 ppb
No 6
B+
157 Black Earth 2.4 ppb
No 4
A-
158 Greenleaf 2.4 ppb
No 2
A-
159 North Freedom 2.4 ppb
No 3
B+
160 Cottage Grove 2.3 ppb
No 2
A-
161 Fitchburg 2.3 ppb
No 0
A
162 Park Falls 2.3 ppb
No 1
A-
163 Cornell 2.3 ppb
No 6
A
164 Elmwood 2.3 ppb
No 2
B+
165 Coleman 2.3 ppb
No 3
A-
166 Withee 2.3 ppb
No 0
A
167 Suring 2.3 ppb
No 5
B-
168 Sheboygan 2.2 ppb
No 1
A-
169 Menomonie 2.2 ppb
No 30
F
170 Black Creek 2.2 ppb
No 0
A
171 Gillett 2.2 ppb
No 0
A
172 Union Grove 2.1 ppb
No 26
D
173 Bay City 2.1 ppb
No 3
A-
174 Sparta 2.1 ppb
No 2
B
175 Milwaukee 2.1 ppb
No 2
A
176 Menomonee Falls 2.1 ppb
No 6
B+
177 Mc Farland 2.1 ppb
No 1
A+
178 Lake Delton 2.1 ppb
No 2
A-
179 Webster 2.1 ppb
No 13
B+
180 Luck 2.1 ppb
No 1
A-
181 Adell 2.1 ppb
No 1
A-
182 Pittsville 2.1 ppb
No 1
A-
183 Boscobel 2.1 ppb
No 7
A-
184 Spooner 2.1 ppb
No 21
B
185 Oak Creek 2.0 ppb
No 5
B
186 Hayward 2.0 ppb
No 19
F
187 Stanley 2.0 ppb
No 2
A
188 King 2.0 ppb
No 0
B+
189 Clear Lake 2.0 ppb
No 1
A
190 Rib Lake 2.0 ppb
No 2
B+
191 Siren 2.0 ppb
No 9
A
192 Dresser 2.0 ppb
No 5
A
193 Montreal 2.0 ppb
No 10
B-
194 Arlington 2.0 ppb
No 7
B
195 Pell Lake 1.9 ppb
No 3
C
196 Arena 1.9 ppb
No 5
C-
197 Prescott 1.9 ppb
No 8
B+
198 Mishicot 1.9 ppb
No 0
B+
199 Barneveld 1.9 ppb
No 5
B
200 Prentice 1.9 ppb
No 5
B
201 Wales 1.9 ppb
No 7
C+
202 Ettrick 1.9 ppb
No 1
A-
203 Arcadia 1.8 ppb
No 0
A+
204 La Valle 1.8 ppb
No 16
B-
205 Lancaster 1.8 ppb
No 3
A
206 Omro 1.8 ppb
No 1
A-
207 Ladysmith 1.8 ppb
No 18
D
208 Tomahawk 1.8 ppb
No 3
B
209 Bayfield 1.8 ppb
No 7
C
210 Turtle Lake 1.8 ppb
No 2
A+
211 Shiocton 1.8 ppb
No 1
A
212 Cascade 1.8 ppb
No 1
B+
213 Mosinee 1.8 ppb
No 15
F
214 Owen 1.8 ppb
No 5
C-
215 Eagle River 1.7 ppb
No 2
B-
216 Glendale 1.7 ppb
No 1
A-
217 Seymour 1.7 ppb
No 2
A-
218 Pardeeville 1.7 ppb
No 5
A
219 Fort Atkinson 1.7 ppb
No 14
A-
220 Fennimore 1.6 ppb
No 0
A
221 Evansville 1.6 ppb
No 25
C-
222 Prairie Du Sac 1.6 ppb
No 12
C+
223 Barron 1.6 ppb
No 1
B+
224 Bonduel 1.6 ppb
No 0
A-
225 Wonewoc 1.6 ppb
No 1
A
226 Boyd 1.6 ppb
No 3
A
227 Burlington 1.6 ppb
No 27
B-
228 Antigo 1.6 ppb
No 8
F
229 Rockland 1.5 ppb
No 1
A-
230 Freedom 1.5 ppb
No 1
A
231 Belleville 1.5 ppb
No 2
B+
232 Whitehall 1.5 ppb
No 2
B
233 Frederic 1.5 ppb
No 0
A-
234 Wittenberg 1.5 ppb
No 0
A+
235 Hatley 1.5 ppb
No 5
A
236 West Salem 1.5 ppb
No 3
B+
237 Milton 1.5 ppb
No 1
A
238 Westby 1.5 ppb
No 3
B
239 New Lisbon 1.4 ppb
No 3
B+
240 Sharon 1.4 ppb
No 6
C-
241 Rio 1.4 ppb
No 1
B+
242 St Nazianz 1.4 ppb
No 2
A
243 Prairie Du Chien 1.4 ppb
No 9
B
244 Wauzeka 1.3 ppb
No 0
A
245 Menasha 1.3 ppb
No 1
B+
246 Waterloo 1.3 ppb
No 5
A-
247 Belgium 1.3 ppb
No 2
A-
248 Randolph 1.3 ppb
No 7
B
249 Shell Lake 1.3 ppb
No 14
B+
250 Iron River 1.3 ppb
No 11
C+
251 Bangor 1.3 ppb
No 3
A-
252 Ontario 1.3 ppb
No 12
B+
253 Elm Grove 1.3 ppb
No 28
F
254 Osseo 1.2 ppb
No 1
A
255 Viola 1.2 ppb
No 0
B+
256 Bloomington 1.2 ppb
No 2
A+
257 Delafield 1.2 ppb
No 22
D
258 Cumberland 1.2 ppb
No 5
A
259 Redgranite 1.2 ppb
No 1
A-
260 Cadott 1.2 ppb
No 0
A
261 Rhinelander 1.1 ppb
No 5
B
262 Lone Rock 1.1 ppb
No 3
A-
263 Suamico 1.1 ppb
No 1
A
264 Odanah 1.1 ppb
No 2
D+
265 Princeton 1.1 ppb
No 22
B+
266 Birnamwood 1.1 ppb
No 2
A
267 Montfort 1.1 ppb
No 5
B
268 Franklin 1.0 ppb
No 10
B
269 Brodhead 1.0 ppb
No 0
A+
270 Grand Chute 1.0 ppb
No 2
A
271 Baldwin 1.0 ppb
No 2
A
272 Mondovi 1.0 ppb
No 5
B+
273 Roberts 1.0 ppb
No 1
A-
274 Balsam Lake 1.0 ppb
No 4
A
275 Allenton 1.0 ppb
No 2
A
276 Altoona 1.0 ppb
No 15
C+
277 Rice Lake 1.0 ppb
No 17
F
278 Darlington 1.0 ppb
No 5
A-
279 Benton 1.0 ppb
No 1
A
280 Cassville 1.0 ppb
No 7
B-
281 Minong 1.0 ppb
No 0
A
282 Sussex 0.9 ppb
No 70
D+
283 Colby 0.9 ppb
No 0
A-
284 Marinette 0.9 ppb
No 0
A-
285 Winneconne 0.9 ppb
No 17
C
286 Fall River 0.9 ppb
No 3
B+
287 Gresham 0.9 ppb
No 5
B
288 Blue Mounds 0.9 ppb
No 3
A-
289 Brown Deer 0.9 ppb
No 5
A
290 Stetsonville 0.9 ppb
No 6
C+
291 Darien 0.9 ppb
No 2
A
292 Pleasant Prairie 0.9 ppb
No 7
B+
293 Livingston 0.9 ppb
No 5
A
294 Waupun 0.9 ppb
No 22
C+
295 Tigerton 0.9 ppb
No 1
B
296 Eagle 0.9 ppb
No 27
B+
297 Lena 0.8 ppb
No 3
B+
298 Hilbert 0.8 ppb
No 3
A
299 Bruce 0.8 ppb
No 6
A
300 Peshtigo 0.8 ppb
No 18
A-
301 Johnson Creek 0.8 ppb
No 7
C
302 Kohler 0.8 ppb
No 0
A-
303 Strum 0.8 ppb
No 5
B+
304 Phelps 0.8 ppb
No 2
A-
305 Chilton 0.8 ppb
No 8
B+
306 Glidden 0.8 ppb
No 3
B+
307 Brooklyn 0.8 ppb
No 3
A
308 New Holstein 0.8 ppb
No 2
A-
309 Kiel 0.8 ppb
No 3
A-
310 Kronenwetter 0.8 ppb
No 1
B+
311 Weston 0.8 ppb
No 0
B+
312 Green Lake 0.8 ppb
No 5
B-
313 Wabeno 0.8 ppb
No 1
A
314 Grafton 0.7 ppb
No 12
C+
315 Spring Green 0.7 ppb
No 14
C
316 Niagara 0.7 ppb
No 0
A-
317 Lac Du Flambeau 0.7 ppb
No 1
A
318 Orfordville 0.7 ppb
No 0
A
319 Dodgeville 0.7 ppb
No 5
A-
320 Denmark 0.7 ppb
No 4
B
321 Theresa 0.7 ppb
No 3
B
322 Stoughton 0.7 ppb
No 4
B+
323 East Troy 0.7 ppb
No 1
B
324 West Baraboo 0.7 ppb
No 0
A-
325 Bristol 0.7 ppb
No 10
B
326 Woodville 0.7 ppb
No 2
A-
327 Colfax 0.6 ppb
No 2
B
328 Spencer 0.6 ppb
No 1
B+
329 Friendship 0.6 ppb
No 4
B
330 Thiensville 0.6 ppb
No 30
D
331 Stevens Point 0.6 ppb
No 14
C+
332 Waukesha 0.6 ppb
No 320
D
333 Albany 0.6 ppb
No 3
A-
334 Berlin 0.6 ppb
No 13
A
335 Elkhart Lake 0.5 ppb
No 3
A
336 Merrimac 0.5 ppb
No 6
B+
337 Random Lake 0.5 ppb
No 0
A-
338 Chetek 0.5 ppb
No 6
C+
339 Medford 0.5 ppb
No 9
C+
340 Brownsville 0.5 ppb
No 8
B+
341 Sullivan 0.5 ppb
No 0
A
342 Oconomowoc 0.5 ppb
No 13
B
343 Ixonia 0.5 ppb
No 16
D+
344 Mequon 0.5 ppb
No 21
F
345 Lodi 0.5 ppb
No 20
B-
346 Star Prairie 0.4 ppb
No 4
A
347 Clinton 0.4 ppb
No 4
B-
348 Hustisford 0.4 ppb
No 14
A
349 Marathon City 0.4 ppb
No 2
B
350 Germantown 0.4 ppb
No 8
B-
351 Waldo 0.3 ppb
No 1
A-
352 Nekoosa 0.3 ppb
No 4
A-
353 New Berlin 0.3 ppb
No 14
B
354 Marshall 0.3 ppb
No 3
A
355 Greendale 0.3 ppb
No 1
A-
356 Hurley 0.3 ppb
No 8
B+
357 Chippewa Falls 0.3 ppb
No 12
D+
358 Osceola 0.3 ppb
No 8
B
359 Oregon 0.3 ppb
No 12
D+
360 Crivitz 0.3 ppb
No 2
A-
361 Hobart 0.3 ppb
No 2
B-
362 Monticello 0.3 ppb
No 1
B+
363 Minocqua 0.2 ppb
No 4
C-
364 Hales Corners 0.2 ppb
No 6
C+
365 Merrillan 0.2 ppb
No 1
B+
366 Dousman 0.2 ppb
No 12
C
367 Wautoma 0.2 ppb
No 0
A
368 Shawano 0.2 ppb
No 11
A
369 Beaver Dam 0.1 ppb
No 11
A-
370 Phillips 0.1 ppb
No 3
B
371 De Pere 0.0 ppb
No 38
B
372 Watertown 0.0 ppb
No 10
D
373 Onalaska 0.0 ppb
No 2
A-
374 Kaukauna 0.0 ppb
No 9
B+
375 Pewaukee 0.0 ppb
No 71
F
376 River Falls 0.0 ppb
No 14
C+
377 Whitewater 0.0 ppb
No 22
C+
378 Plover 0.0 ppb
No 9
B+
379 Port Washington 0.0 ppb
No 6
B+
380 Baraboo 0.0 ppb
No 0
B
381 Portage 0.0 ppb
No 9
B
382 New Richmond 0.0 ppb
No 15
B
383 Holmen 0.0 ppb
No 5
B-
384 Reedsburg 0.0 ppb
No 1
B+
385 Delavan 0.0 ppb
No 6
F
386 Tomah 0.0 ppb
No 18
B+
387 Sheboygan Falls 0.0 ppb
No 5
B-
388 Keshena 0.0 ppb
No 6
C+
389 Waterford 0.0 ppb
No 13
B
390 Kewaskum 0.0 ppb
No 0
A
391 Wrightstown 0.0 ppb
No 4
B
392 Horicon 0.0 ppb
No 10
B+
393 Combined Locks 0.0 ppb
No 1
B
394 Fox Lake 0.0 ppb
No 6
B
395 Algoma 0.0 ppb
No 2
A-
396 Sherwood 0.0 ppb
No 12
B-
397 Oconto Falls 0.0 ppb
No 4
B+
398 Amery 0.0 ppb
No 1
B
399 New Glarus 0.0 ppb
No 1
A-
400 Fredonia 0.0 ppb
No 3
A
401 Schofield 0.0 ppb
No 2
B
402 Butler 0.0 ppb
No 0
A-
403 Cuba City 0.0 ppb
No 4
B
404 Durand 0.0 ppb
No 0
A
405 Cameron 0.0 ppb
No 10
B+
406 New Franken 0.0 ppb
No 4
A-
407 Trempealeau 0.0 ppb
No 5
A
408 Hammond 0.0 ppb
No 5
A
409 Mazomanie 0.0 ppb
No 1
B+
410 Grantsburg 0.0 ppb
No 0
B+
411 Independence 0.0 ppb
No 1
A
412 Edgar 0.0 ppb
No 1
B+
413 Augusta 0.0 ppb
No 2
D+
414 Spring Valley 0.0 ppb
No 2
A-
415 Montello 0.0 ppb
No 9
B-
416 Elroy 0.0 ppb
No 5
A-
417 Hazel Green 0.0 ppb
No 14
F
418 Loyal 0.0 ppb
No 2
A-
419 Blair 0.0 ppb
No 2
A-
420 Laona 0.0 ppb
No 19
D+
421 Glenwood City 0.0 ppb
No 0
A-
422 Greenwood 0.0 ppb
No 2
A-
423 Dickeyville 0.0 ppb
No 0
B+
424 Oakfield 0.0 ppb
No 0
A
425 Elk Mound 0.0 ppb
No 4
B+
426 Boyceville 0.0 ppb
No 2
A-
427 Paddock Lake 0.0 ppb
No 2
B
428 Highland 0.0 ppb
No 2
A
429 Dorchester 0.0 ppb
No 1
B+
430 Footville 0.0 ppb
No 1
A-
431 Blanchardville 0.0 ppb
No 0
A
432 Stoddard 0.0 ppb
No 7
B+
433 Alma 0.0 ppb
No 0
A-
434 Coon Valley 0.0 ppb
No 2
B+
435 La Farge 0.0 ppb
No 0
A
436 Almena 0.0 ppb
No 0
A
437 Norwalk 0.0 ppb
No 1
A
438 Stockbridge 0.0 ppb
No 1
B+
439 Avoca 0.0 ppb
No 2
B+
440 Soldiers Grove 0.0 ppb
No 3
A
441 South Wayne 0.0 ppb
No 13
A-
442 Land O Lakes 0.0 ppb
No 7
C-
443 Kieler 0.0 ppb
No 1
B+
444 New Auburn 0.0 ppb
No 13
A
445 Warrens 0.0 ppb
No 6
A-
446 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 446 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 DakotaOhioOklahomaOregonPennsylvaniaQCRhode IslandSouth CarolinaSouth DakotaTennesseeTexasUtahVermontVirginiaWashingtonWest VirginiaWisconsinWyoming
← Lead contamination overview Explore Wisconsin water quality → National Lead map →