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Lead Contamination

Lead in Illinois Drinking Water

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

891
Cities Tested
24
Exceeds Limit
3%
% Exceeds Limit
2.6 ppb
State Avg
▲ 1% vs national
vs National
695
Health Violations
Analysis

Lead in Illinois: what the data shows

Illinois has 891 cities with lead monitoring data, with some 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 — worse than the national average. 24 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

Illinois
3%
24 of 891 cities
→ ▲ 1% above national rate (worse)
National avg
2%
378 of 15681 cities
City Map

Lead data across Illinois

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 Illinois

Highest Lead levels (ppb)

  1. 1 C Vergennes 95.0 ppb Yes 1K
  2. 2 C Little York 55.0 ppb Yes 742
  3. 3 C La Moille 54.8 ppb Yes 750
  4. 4 D Le Roy 49.0 ppb Yes 3K
  5. 5 D+ Kansas 46.8 ppb Yes 707
  6. 6 F Lockport 33.0 ppb Yes 26K
  7. 7 C Shannon 30.3 ppb Yes 801
  8. 8 B- Princeton 27.0 ppb Yes 8K
  9. 9 B- Bartlett 24.6 ppb Yes 42K
  10. 10 C Libertyville 24.5 ppb Yes 51K
All Cities

All Illinois cities ranked by lead level

# City Level Level Exceeds? Violations Grade
1 Vergennes 95.0 ppb
Yes 3
C
2 Little York 55.0 ppb
Yes 37
C
3 La Moille 54.8 ppb
Yes 1
C
4 Le Roy 49.0 ppb
Yes 12
D
5 Kansas 46.8 ppb
Yes 2
D+
6 Lockport 33.0 ppb
Yes 20
F
7 Shannon 30.3 ppb
Yes 34
C
8 Princeton 27.0 ppb
Yes 4
B-
9 Bartlett 24.6 ppb
Yes 49
B-
10 Libertyville 24.5 ppb
Yes 14
C
11 Aurora 24.0 ppb
Yes 20
D
12 Waynesville 22.8 ppb
Yes 25
C+
13 Lemont 20.0 ppb
Yes 26
D
14 Lovington 20.0 ppb
Yes 1
B-
15 Galva 19.0 ppb
Yes 16
C+
16 Morton Grove 17.2 ppb
Yes 2
B-
17 Northfield 17.0 ppb
Yes 1
B-
18 Evansville 17.0 ppb
Yes 13
C+
19 Danforth 17.0 ppb
Yes 5
C
20 Homewood 16.0 ppb
Yes 2
C
21 Herrin 16.0 ppb
Yes 0
C+
22 Highwood 16.0 ppb
Yes 0
B
23 Calumet City 15.4 ppb
Yes 3
C-
24 Burnham 15.1 ppb
Yes 3
C-
25 Palatine 15.0 ppb
No 2
B
26 Lake Barrington 15.0 ppb
No 5
B-
27 Sherman 15.0 ppb
No 0
C+
28 Hawthorn Woods 13.8 ppb
No 3
B
29 Greenup 13.5 ppb
No 0
B
30 Piper City 13.1 ppb
No 1
B
31 Danville 13.0 ppb
No 24
B
32 Hazel Crest 13.0 ppb
No 2
B
33 Rockdale 12.8 ppb
No 36
C-
34 Niles 12.4 ppb
No 3
B
35 Skokie 12.3 ppb
No 9
C-
36 De Kalb 12.0 ppb
No 7
B+
37 Freeport 12.0 ppb
No 19
B-
38 Plano 12.0 ppb
No 0
B+
39 North Riverside 12.0 ppb
No 4
B+
40 Farmer City 12.0 ppb
No 1
B-
41 Oak Lawn 11.6 ppb
No 2
B
42 West Frankfort 11.3 ppb
No 6
B+
43 Highland Park 11.0 ppb
No 2
B+
44 Woodstock 11.0 ppb
No 3
B-
45 Peoria Heights 11.0 ppb
No 5
B+
46 Okawville 11.0 ppb
No 4
A-
47 La Salle 10.7 ppb
No 6
B-
48 Colfax 10.7 ppb
No 5
B-
49 Wenona 10.7 ppb
No 12
B-
50 Park Ridge 10.6 ppb
No 1
B
51 Herscher 10.6 ppb
No 0
B+
52 Teutopolis 10.4 ppb
No 2
B
53 Lake Zurich 10.2 ppb
No 35
B+
54 Dolton 10.1 ppb
No 2
C
55 Amboy 10.1 ppb
No 0
B
56 Westville 10.0 ppb
No 13
B+
57 Menard 10.0 ppb
No 1
F
58 Pecatonica 10.0 ppb
No 1
A-
59 Richton Park 9.8 ppb
No 5
F
60 Maywood 9.8 ppb
No 3
C+
61 Westchester 9.7 ppb
No 2
B
62 Deerfield 9.4 ppb
No 4
B
63 Chicago 9.3 ppb
No 68
F
64 Burbank 9.2 ppb
No 1
B-
65 Valmeyer 9.1 ppb
No 1
C-
66 Waukegan 9.0 ppb
No 5
B+
67 Lake Bluff 9.0 ppb
No 18
C+
68 Pembroke 8.9 ppb
No 0
B-
69 Arlington Heights 8.8 ppb
No 1
B-
70 Lansing 8.8 ppb
No 2
B
71 Waterman 8.8 ppb
No 17
A-
72 Des Plaines 8.6 ppb
No 0
B+
73 Riverside 8.6 ppb
No 4
B+
74 Bradford 8.6 ppb
No 21
A-
75 Evergreen Park 8.6 ppb
No 0
B+
76 Winnetka 8.5 ppb
No 0
A
77 Bloomington 8.5 ppb
No 21
F
78 Rockford 8.4 ppb
No 43
F
79 Tampa 8.3 ppb
No 8
B+
80 Percy 8.3 ppb
No 16
B+
81 Romeoville 8.2 ppb
No 17
A-
82 Westmont 8.2 ppb
No 6
B-
83 Lake Forest 8.1 ppb
No 58
B-
84 Zeigler 8.0 ppb
No 0
B+
85 Edinburg 8.0 ppb
No 8
C-
86 Granville 7.7 ppb
No 27
B+
87 Alpha 7.6 ppb
No 13
C
88 Hudson 7.5 ppb
No 5
B+
89 Naperville 7.4 ppb
No 0
B+
90 Mundelein 7.4 ppb
No 22
F
91 Midlothian 7.3 ppb
No 5
A-
92 Elmwood Park 7.2 ppb
No 3
B+
93 Warrensburg 7.0 ppb
No 4
B-
94 Techny 7.0 ppb
No 2
A-
95 Prairie Du Rochr 7.0 ppb
No 1
B-
96 Brookfield 6.9 ppb
No 0
A-
97 South Chicago Heights 6.6 ppb
No 2
A-
98 Harwood Heights 6.6 ppb
No 3
A-
99 Saint Charles 6.5 ppb
No 3
B+
100 Kenilworth 6.5 ppb
No 1
A-
101 Clarendon Hills 6.3 ppb
No 1
A-
102 Toulon 6.3 ppb
No 13
B
103 Bensenville 6.3 ppb
No 4
A
104 Byron 6.2 ppb
No 1
C+
105 Shabbona 6.2 ppb
No 0
B+
106 La Grange 6.2 ppb
No 1
B
107 Forest View 6.2 ppb
No 1
B+
108 Elmhurst 6.1 ppb
No 2
A-
109 River Grove 6.1 ppb
No 3
A-
110 Cicero 6.1 ppb
No 3
B
111 Norridge 6.0 ppb
No 0
A-
112 Riverdale 5.9 ppb
No 6
B+
113 Broadview 5.9 ppb
No 3
B
114 Chicago Heights 5.9 ppb
No 0
B+
115 Metamora 5.7 ppb
No 10
C
116 Evanston 5.6 ppb
No 1
A+
117 Rock Island 5.6 ppb
No 5
B-
118 Freeburg 5.6 ppb
No 7
A-
119 Tower Hill 5.6 ppb
No 1
B+
120 Melrose Park 5.6 ppb
No 6
C
121 Johnston City 5.5 ppb
No 2
B
122 Franklin Park 5.5 ppb
No 5
B
123 Milledgeville 5.5 ppb
No 2
A
124 Flossmoor 5.4 ppb
No 1
B+
125 Yates City 5.4 ppb
No 12
A-
126 Pleasant Plains 5.4 ppb
No 0
B+
127 Chadwick 5.3 ppb
No 2
A-
128 Machesney Park 5.3 ppb
No 4
B
129 Vandalia 5.3 ppb
No 13
B-
130 Carrier Mills 5.3 ppb
No 3
A-
131 Groveland 5.2 ppb
No 0
A+
132 Downers Grove 5.1 ppb
No 2
A
133 Milford 5.1 ppb
No 5
C+
134 Oak Park 5.1 ppb
No 2
A
135 Saybrook 5.0 ppb
No 0
A-
136 Kingston 5.0 ppb
No 9
C+
137 Granite City 5.0 ppb
No 0
B+
138 Antioch 5.0 ppb
No 6
C-
139 Carlyle 5.0 ppb
No 15
B
140 Sandwich 5.0 ppb
No 10
B
141 Watseka 5.0 ppb
No 9
A-
142 Henry 5.0 ppb
No 3
A-
143 Port Byron 5.0 ppb
No 4
B-
144 Braceville 5.0 ppb
No 9
C
145 Normal 4.9 ppb
No 3
D+
146 Hennepin 4.9 ppb
No 7
A-
147 Hinsdale 4.8 ppb
No 0
A
148 White Hall 4.8 ppb
No 12
C+
149 Wyoming 4.8 ppb
No 8
B+
150 Matteson 4.8 ppb
No 1
B
151 Addison 4.7 ppb
No 0
A
152 Valrico 4.7 ppb
No 0
A-
153 Round Lake Beach 4.6 ppb
No 3
B+
154 Effingham 4.6 ppb
No 2
A-
155 Lyons 4.6 ppb
No 7
A-
156 Mascoutah 4.6 ppb
No 6
A-
157 Winnebago 4.6 ppb
No 2
A
158 Hardin 4.5 ppb
No 4
A-
159 Hebron 4.5 ppb
No 2
B
160 Lincolnwood 4.4 ppb
No 1
B+
161 Crystal Lake 4.3 ppb
No 4
A-
162 Oakwood 4.3 ppb
No 18
A-
163 Augusta 4.3 ppb
No 2
A-
164 Mount Prospect 4.3 ppb
No 1
B+
165 Elk Grove 4.2 ppb
No 2
A-
166 Macomb 4.2 ppb
No 39
D
167 Grayslake 4.2 ppb
No 7
B+
168 Illiopolis 4.2 ppb
No 5
B-
169 Olympia Fields 4.2 ppb
No 0
B
170 Calumet Park 4.2 ppb
No 1
B-
171 Nashville 4.1 ppb
No 27
C-
172 Hopkins Park 4.1 ppb
No 0
B
173 Stone Park 4.1 ppb
No 2
B+
174 Forest Park 4.0 ppb
No 2
A-
175 Thornton 4.0 ppb
No 0
B
176 Eureka 3.9 ppb
No 20
B
177 Hanover 3.9 ppb
No 2
A
178 Mulberry Grove 3.9 ppb
No 11
B+
179 North Lake 3.9 ppb
No 1
B+
180 Batavia 3.8 ppb
No 33
B+
181 Roselle 3.8 ppb
No 2
A-
182 Burbank (South Stickney) 3.7 ppb
No 7
B+
183 Maroa 3.7 ppb
No 10
A-
184 Equality 3.7 ppb
No 0
B+
185 Andover 3.7 ppb
No 0
A-
186 Posen 3.6 ppb
No 3
B+
187 Oblong 3.6 ppb
No 0
B+
188 Flanagan 3.6 ppb
No 1
B+
189 Pocahontas 3.5 ppb
No 1
C+
190 Washington 3.5 ppb
No 5
C
191 Morris 3.4 ppb
No 74
F
192 Red Bud 3.4 ppb
No 3
B-
193 East Galesburg 3.4 ppb
No 0
B
194 Centralia 3.3 ppb
No 2
B
195 Round Lake 3.3 ppb
No 3
A-
196 Kewanee 3.3 ppb
No 34
B
197 Carbon Cliff 3.3 ppb
No 12
B+
198 Stickney 3.3 ppb
No 1
B+
199 Sesser 3.3 ppb
No 0
A
200 Oak Brook 3.2 ppb
No 8
D
201 Georgetown 3.2 ppb
No 50
B
202 Chrisman 3.2 ppb
No 36
F
203 Watson 3.2 ppb
No 2
B+
204 Rock Falls 3.1 ppb
No 8
B
205 Wamac 3.1 ppb
No 0
B+
206 Alton 3.0 ppb
No 1
B
207 Mchenry 3.0 ppb
No 57
F
208 Du Quoin 3.0 ppb
No 6
B
209 Villa Grove 3.0 ppb
No 4
B+
210 Bunker Hill 3.0 ppb
No 0
A-
211 Sherrard 3.0 ppb
No 14
B
212 Sandoval 3.0 ppb
No 1
A
213 Andalusia 3.0 ppb
No 0
B+
214 Alto Pass 3.0 ppb
No 33
A-
215 Wonder Lake 2.9 ppb
No 6
C+
216 Apopka 2.9 ppb
No 0
B+
217 Atlanta 2.9 ppb
No 8
B+
218 Stronghurst 2.9 ppb
No 0
A-
219 Cissna Park 2.9 ppb
No 0
B+
220 Cary 2.8 ppb
No 11
A-
221 Long Creek 2.8 ppb
No 2
A
222 Dwight 2.8 ppb
No 8
B+
223 East Dundee 2.8 ppb
No 0
A-
224 Astoria 2.8 ppb
No 1
A-
225 Bannockburn 2.8 ppb
No 4
A-
226 Steger 2.8 ppb
No 8
B+
227 Bellwood 2.8 ppb
No 7
B+
228 Glen Ellyn 2.8 ppb
No 0
A-
229 Dixmoor 2.7 ppb
No 4
B-
230 North Chicago 2.7 ppb
No 5
B+
231 Lake In The Hills 2.7 ppb
No 4
A-
232 Western Springs 2.7 ppb
No 2
B
233 Auburn 2.7 ppb
No 5
A-
234 Morrisonville 2.7 ppb
No 1
B+
235 Hopedale 2.7 ppb
No 1
A-
236 Alhambra 2.7 ppb
No 1
A
237 Canton 2.6 ppb
No 7
B+
238 Pana 2.6 ppb
No 39
B
239 Royalton 2.6 ppb
No 0
B
240 Pleasant Hill 2.6 ppb
No 0
B
241 Green Valley 2.6 ppb
No 1
A-
242 Forrest 2.6 ppb
No 0
A-
243 Oreana 2.5 ppb
No 0
B+
244 Annawan 2.5 ppb
No 5
A-
245 Marshall 2.5 ppb
No 0
A-
246 Riverwoods 2.5 ppb
No 1
A+
247 Savanna 2.5 ppb
No 0
B+
248 Tremont 2.5 ppb
No 1
A-
249 Richmond 2.5 ppb
No 1
A-
250 Tovey 2.5 ppb
No 1
A-
251 Blue Island 2.5 ppb
No 19
C
252 Galena 2.5 ppb
No 17
D+
253 Mount Vernon 2.4 ppb
No 2
B+
254 Breese 2.4 ppb
No 0
C+
255 Orion 2.4 ppb
No 2
B-
256 Holiday Hills 2.4 ppb
No 0
A
257 Carbondale 2.3 ppb
No 26
D
258 South Holland 2.3 ppb
No 5
B-
259 Park Forest 2.3 ppb
No 2
A
260 Gilberts 2.3 ppb
No 0
A-
261 Island Lake 2.3 ppb
No 1
A-
262 Marissa 2.3 ppb
No 1
B+
263 Dunlap 2.3 ppb
No 2
A
264 Harvey 2.2 ppb
No 1
B
265 Coal Valley 2.2 ppb
No 12
F
266 Hamilton 2.2 ppb
No 7
A
267 Clifton 2.2 ppb
No 3
C
268 Cobden 2.2 ppb
No 0
A-
269 Albany 2.2 ppb
No 2
D+
270 Phoenix 2.1 ppb
No 6
C+
271 Crestwood 2.1 ppb
No 0
B
272 Pittsfield 2.1 ppb
No 18
A
273 Shelbyville 2.1 ppb
No 0
A-
274 Brighton 2.1 ppb
No 3
B+
275 St David 2.1 ppb
No 2
A-
276 Shipman 2.1 ppb
No 15
A-
277 Reynolds 2.1 ppb
No 0
A
278 East St Louis 2.0 ppb
No 1
B+
279 Dieterich 2.0 ppb
No 7
F
280 Grays Lake 2.0 ppb
No 6
A
281 Pontiac 2.0 ppb
No 10
C
282 Maryville 2.0 ppb
No 2
A
283 Riverton 2.0 ppb
No 0
B+
284 Earlville 2.0 ppb
No 0
A
285 Arenzville 2.0 ppb
No 15
A-
286 Mt. Olive 2.0 ppb
No 9
B+
287 Casey 1.9 ppb
No 16
B
288 Griggsville 1.9 ppb
No 0
A-
289 Downs 1.9 ppb
No 8
B
290 Meredosia 1.9 ppb
No 0
A-
291 Wolf Lake 1.9 ppb
No 4
A-
292 Congerville 1.9 ppb
No 21
B
293 Ashley 1.9 ppb
No 7
A
294 Berwyn 1.8 ppb
No 3
A-
295 Morton 1.8 ppb
No 13
B-
296 Bethalto 1.8 ppb
No 0
A-
297 Waterloo 1.8 ppb
No 1
C
298 Rochelle 1.8 ppb
No 11
A
299 Chester 1.8 ppb
No 7
A
300 Chillicothe 1.8 ppb
No 11
D+
301 Hoopeston 1.8 ppb
No 2
A-
302 Paxton 1.8 ppb
No 0
B+
303 Colona 1.8 ppb
No 27
C+
304 Sleepy Hollow 1.8 ppb
No 4
A-
305 Philo 1.8 ppb
No 0
A-
306 Ashkum 1.8 ppb
No 11
C+
307 Union 1.8 ppb
No 5
B+
308 Steeleville 1.7 ppb
No 24
D+
309 Bluford 1.7 ppb
No 1
A
310 Moweaqua 1.7 ppb
No 0
A-
311 Loda 1.7 ppb
No 1
B
312 Payson 1.7 ppb
No 3
A-
313 Carpentersville 1.6 ppb
No 0
B+
314 Fox Lake 1.6 ppb
No 5
C+
315 Carrollton 1.6 ppb
No 1
A-
316 Green Rock 1.6 ppb
No 0
A
317 Buckley 1.6 ppb
No 0
A
318 Farina 1.6 ppb
No 5
A
319 Warrenville 1.6 ppb
No 0
B+
320 Schiller Park 1.5 ppb
No 7
A-
321 Wheaton 1.5 ppb
No 2
B-
322 Glendale Heights 1.5 ppb
No 1
A
323 Markham 1.5 ppb
No 7
B
324 Mount Zion 1.5 ppb
No 29
B-
325 Lakewood 1.5 ppb
No 2
B-
326 Heyworth 1.5 ppb
No 0
A
327 Bement 1.5 ppb
No 1
B+
328 Stillman Valley 1.5 ppb
No 0
A
329 Ashton 1.5 ppb
No 0
B+
330 Loami 1.5 ppb
No 1
A-
331 Kirkwood 1.5 ppb
No 27
B+
332 New Boston 1.5 ppb
No 6
A
333 Hanover Park 1.5 ppb
No 3
A
334 Kankakee 1.4 ppb
No 40
F
335 Yorkville 1.4 ppb
No 83
C+
336 Braidwood 1.4 ppb
No 14
A-
337 Charleston 1.4 ppb
No 10
C+
338 Taylorville 1.4 ppb
No 0
A-
339 Mahomet 1.4 ppb
No 4
B+
340 Harvard 1.4 ppb
No 3
A
341 Eldorado 1.4 ppb
No 3
B-
342 Geneseo 1.4 ppb
No 124
F
343 Rockton 1.4 ppb
No 31
C
344 Anna 1.4 ppb
No 7
B-
345 Creve Coeur 1.4 ppb
No 4
A-
346 Round Lake Park 1.4 ppb
No 1
B-
347 Makanda 1.4 ppb
No 6
B+
348 Round Lake Heights 1.4 ppb
No 0
A-
349 De Soto 1.4 ppb
No 2
A
350 Sheffield 1.4 ppb
No 2
A
351 Cambridge 1.3 ppb
No 11
A-
352 Girard 1.3 ppb
No 7
A-
353 Hampton 1.3 ppb
No 3
B
354 Barry 1.3 ppb
No 3
B+
355 Blue Mound 1.3 ppb
No 26
C
356 Johnsburg 1.3 ppb
No 5
B-
357 Brimfield 1.3 ppb
No 6
A-
358 Wataga 1.3 ppb
No 3
B
359 Mendon 1.3 ppb
No 2
A+
360 Stanford 1.3 ppb
No 1
A
361 Blandinsville 1.3 ppb
No 6
A
362 East Hazel Crest 1.3 ppb
No 4
A-
363 Crest Hill 1.2 ppb
No 12
F
364 Alsip 1.2 ppb
No 2
A-
365 Peoria 1.2 ppb
No 5
D+
366 Marion 1.2 ppb
No 29
D
367 Loves Park 1.2 ppb
No 35
B
368 Lebanon 1.2 ppb
No 6
A
369 Oregon 1.2 ppb
No 4
B+
370 Norris City 1.2 ppb
No 1
A-
371 Mount Morris 1.2 ppb
No 26
A-
372 Forreston 1.2 ppb
No 0
A
373 Louisville 1.2 ppb
No 1
A-
374 Marine 1.2 ppb
No 0
B
375 Roseville 1.2 ppb
No 11
A-
376 Mathersville 1.2 ppb
No 0
A
377 Deer Creek 1.2 ppb
No 1
A-
378 Secor 1.2 ppb
No 12
D
379 Lombard 1.2 ppb
No 1
A-
380 Moline 1.1 ppb
No 7
C
381 South Elgin 1.1 ppb
No 28
C
382 Rantoul 1.1 ppb
No 54
D
383 Mount Carroll 1.1 ppb
No 8
A
384 Viola 1.1 ppb
No 27
B
385 Clay City 1.1 ppb
No 1
A
386 Boynton Beach 1.1 ppb
No 3
B
387 Wyanet 1.1 ppb
No 2
B+
388 Minooka 1.1 ppb
No 6
A-
389 Lynwood 1.1 ppb
No 3
B
390 East Chicago Heights 1.0 ppb
No 19
B-
391 Quincy 1.0 ppb
No 3
B-
392 Pekin 1.0 ppb
No 1
D+
393 East Peoria 1.0 ppb
No 133
F
394 Villa Park 1.0 ppb
No 2
A
395 Streator 1.0 ppb
No 14
A-
396 Milan 1.0 ppb
No 28
D
397 Scott Air Force Base 1.0 ppb
No 3
A
398 Morrison 1.0 ppb
No 3
B+
399 Delavan 1.0 ppb
No 2
B+
400 Cairo 1.0 ppb
No 0
A
401 Macon 1.0 ppb
No 1
B+
402 Rosiclare 1.0 ppb
No 1
A
403 Worden 1.0 ppb
No 2
B
404 Crescent City 1.0 ppb
No 2
A
405 Glenwood 0.9 ppb
No 0
B+
406 Rolling Meadows 0.9 ppb
No 3
A
407 Hillside 0.9 ppb
No 1
A
408 West Chicago 0.9 ppb
No 22
A
409 Garden Homes 0.9 ppb
No 1
B+
410 Carol Stream 0.8 ppb
No 1
A-
411 Princeville 0.8 ppb
No 13
A
412 Paris 0.7 ppb
No 12
A
413 Berkeley 0.7 ppb
No 4
A
414 Woodlawn 0.7 ppb
No 1
A
415 Woodhull 0.7 ppb
No 3
A
416 Sparta 0.6 ppb
No 21
B-
417 Pontoon Beach 0.6 ppb
No 1
B+
418 Greenfield 0.6 ppb
No 28
C
419 Thomson 0.6 ppb
No 1
A-
420 Wilmette 0.5 ppb
No 0
A
421 Pearl City 0.4 ppb
No 0
D
422 Crete 0.1 ppb
No 4
B
423 Joliet 0.0 ppb
No 131
F
424 Champaign 0.0 ppb
No 0
A
425 Springfield 0.0 ppb
No 3
D
426 Elgin 0.0 ppb
No 9
C-
427 Decatur 0.0 ppb
No 28
B
428 Schaumburg 0.0 ppb
No 17
B+
429 Bolingbrook 0.0 ppb
No 2
A
430 Godfrey 0.0 ppb
No 22
C+
431 Orland Park 0.0 ppb
No 0
A-
432 Tinley Park 0.0 ppb
No 0
B+
433 Plainfield 0.0 ppb
No 23
B-
434 Hoffman Estates 0.0 ppb
No 7
A+
435 Glenview 0.0 ppb
No 3
B+
436 O Fallon 0.0 ppb
No 17
A-
437 Northbrook 0.0 ppb
No 55
D
438 Buffalo Grove 0.0 ppb
No 1
A
439 Wheeling 0.0 ppb
No 5
A+
440 Streamwood 0.0 ppb
No 2
A-
441 Oswego 0.0 ppb
No 24
A-
442 Edwardsville 0.0 ppb
No 18
D+
443 Darien 0.0 ppb
No 6
C+
444 Vernon Hills 0.0 ppb
No 4
B+
445 Woodridge 0.0 ppb
No 2
A-
446 Geneva 0.0 ppb
No 67
B-
447 Galesburg 0.0 ppb
No 1
B
448 Collinsville 0.0 ppb
No 12
C-
449 Algonquin 0.0 ppb
No 6
A-
450 Gurnee 0.0 ppb
No 4
A
451 Mattoon 0.0 ppb
No 14
B-
452 New Lenox 0.0 ppb
No 7
D+
453 Montgomery 0.0 ppb
No 4
A-
454 Huntley 0.0 ppb
No 15
A
455 Oak Forest 0.0 ppb
No 0
B+
456 Belvidere 0.0 ppb
No 8
A-
457 Zion 0.0 ppb
No 1
B
458 Frankfort 0.0 ppb
No 7
B+
459 Lisle 0.0 ppb
No 2
A-
460 Jacksonville 0.0 ppb
No 28
B-
461 East Moline 0.0 ppb
No 18
D+
462 Weston 0.0 ppb
No 6
A
463 Jerseyville 0.0 ppb
No 6
A-
464 Justice 0.0 ppb
No 0
A-
465 Mokena 0.0 ppb
No 2
A
466 Dixon 0.0 ppb
No 57
C
467 Shorewood 0.0 ppb
No 4
A-
468 Ottawa 0.0 ppb
No 62
F
469 Palos Hills 0.0 ppb
No 3
A
470 Sycamore 0.0 ppb
No 31
A-
471 North Aurora 0.0 ppb
No 27
A-
472 Hampshire 0.0 ppb
No 15
B
473 Lincoln 0.0 ppb
No 8
F
474 Troy 0.0 ppb
No 3
A-
475 Country Club Hills 0.0 ppb
No 0
A-
476 Bridgeview 0.0 ppb
No 0
A-
477 Chatham 0.0 ppb
No 2
A
478 Palos Heights 0.0 ppb
No 1
A-
479 Murphysboro 0.0 ppb
No 8
B
480 Manhattan 0.0 ppb
No 21
C+
481 Cahokia 0.0 ppb
No 0
A+
482 Urbana 0.0 ppb
No 0
C+
483 Coleta 0.0 ppb
No 1
A-
484 Robinson 0.0 ppb
No 0
A-
485 Hickory Hills 0.0 ppb
No 1
A
486 Lindenhurst 0.0 ppb
No 0
B+
487 Highland 0.0 ppb
No 16
B
488 Chicago Ridge 0.0 ppb
No 1
A-
489 Wauconda 0.0 ppb
No 3
A
490 Wood Dale 0.0 ppb
No 0
A-
491 Channahon 0.0 ppb
No 45
B
492 Caseyville 0.0 ppb
No 3
B+
493 Glen Carbon 0.0 ppb
No 0
B
494 La Grange Park 0.0 ppb
No 2
A
495 Harrisburg 0.0 ppb
No 2
C+
496 Benton 0.0 ppb
No 5
D
497 River Forest 0.0 ppb
No 1
B+
498 Carlinville 0.0 ppb
No 74
D
499 Peru 0.0 ppb
No 92
F
500 Sugar Grove 0.0 ppb
No 7
A-
501 Burr Ridge 0.0 ppb
No 0
A
502 Salem 0.0 ppb
No 7
C
503 Columbia 0.0 ppb
No 0
B+
504 Worth 0.0 ppb
No 3
A
505 Summit 0.0 ppb
No 1
B+
506 Barrington 0.0 ppb
No 3
B+
507 St. Charles 0.0 ppb
No 17
F
508 Wood River 0.0 ppb
No 0
B+
509 Sauk 0.0 ppb
No 5
D
510 Fairfield 0.0 ppb
No 16
D+
511 Winfield 0.0 ppb
No 1
A
512 Itasca 0.0 ppb
No 2
A
513 Beach Park 0.0 ppb
No 3
B+
514 Lake Villa 0.0 ppb
No 2
A
515 Willowbrook 0.0 ppb
No 1
B
516 Olney 0.0 ppb
No 3
F
517 Silvis 0.0 ppb
No 14
F
518 Monmouth 0.0 ppb
No 29
A-
519 Hillsboro 0.0 ppb
No 20
B-
520 South Beloit 0.0 ppb
No 3
A-
521 Greenville 0.0 ppb
No 5
A-
522 Pinckneyville 0.0 ppb
No 13
C+
523 Lincolnshire 0.0 ppb
No 2
A
524 Park City 0.0 ppb
No 10
B
525 West Dundee 0.0 ppb
No 7
A
526 Palos Park 0.0 ppb
No 1
B
527 Clayton 0.0 ppb
No 5
A-
528 Marengo 0.0 ppb
No 1
A-
529 Carterville 0.0 ppb
No 3
C+
530 Sullivan 0.0 ppb
No 5
A-
531 Flora 0.0 ppb
No 9
A
532 Clinton 0.0 ppb
No 18
B+
533 Arthur 0.0 ppb
No 0
B
534 Dallas City 0.0 ppb
No 1
B+
535 Carmi 0.0 ppb
No 0
A
536 Mendota 0.0 ppb
No 25
B
537 Mount Carmel 0.0 ppb
No 11
B
538 Elburn 0.0 ppb
No 63
D
539 Pk Forest South 0.0 ppb
No 2
A
540 Volo 0.0 ppb
No 11
C
541 Pittsburg 0.0 ppb
No 0
B+
542 Mcleansboro 0.0 ppb
No 1
B-
543 Joppa 0.0 ppb
No 3
B+
544 Litchfield 0.0 ppb
No 5
D+
545 Lagrange 0.0 ppb
No 0
A-
546 Winthrop Harbor 0.0 ppb
No 7
C
547 Dekalb 0.0 ppb
No 2
A-
548 Countryside 0.0 ppb
No 0
A
549 Brownstown 0.0 ppb
No 10
C+
550 Metropolis 0.0 ppb
No 0
A-
551 Rushville 0.0 ppb
No 5
B+
552 Williamsville 0.0 ppb
No 0
A+
553 Winchester 0.0 ppb
No 8
B-
554 Beardstown 0.0 ppb
No 1
A
555 Wilmington 0.0 ppb
No 10
C+
556 Petersburg 0.0 ppb
No 19
C+
557 Coal City 0.0 ppb
No 40
D
558 East Alton 0.0 ppb
No 0
B
559 Staunton 0.0 ppb
No 21
C+
560 Peotone 0.0 ppb
No 3
A-
561 Monticello 0.0 ppb
No 0
A-
562 Spring Valley 0.0 ppb
No 15
A
563 Poplar Grove 0.0 ppb
No 8
C+
564 Marseilles 0.0 ppb
No 116
D
565 Odin 0.0 ppb
No 2
A-
566 Mt Vernon 0.0 ppb
No 1
A
567 Robbins 0.0 ppb
No 7
C-
568 Genoa 0.0 ppb
No 4
A
569 Westhaven 0.0 ppb
No 3
A+
570 Albion 0.0 ppb
No 1
A-
571 Monee 0.0 ppb
No 2
B
572 Dupo 0.0 ppb
No 0
B
573 Tuscola 0.0 ppb
No 0
A
574 Fox River Grove 0.0 ppb
No 10
B
575 Mount Sterling 0.0 ppb
No 1
A-
576 Wayne City 0.0 ppb
No 15
B+
577 Aviston 0.0 ppb
No 42
C-
578 Cherry Valley 0.0 ppb
No 2
B+
579 Beecher 0.0 ppb
No 0
A-
580 Virden 0.0 ppb
No 15
A-
581 Oglesby 0.0 ppb
No 6
B-
582 Athens 0.0 ppb
No 0
B+
583 Sublette 0.0 ppb
No 15
A-
584 Lawrenceville 0.0 ppb
No 6
C+
585 Smithton 0.0 ppb
No 7
B
586 Cortland 0.0 ppb
No 25
A
587 Hometown 0.0 ppb
No 2
A-
588 New Baden 0.0 ppb
No 2
A-
589 Millstadt 0.0 ppb
No 4
A-
590 Wasco 0.0 ppb
No 14
A
591 Rochester 0.0 ppb
No 0
A-
592 Rosemont 0.0 ppb
No 0
A-
593 Tolono 0.0 ppb
No 6
B+
594 Glasford 0.0 ppb
No 64
B
595 Bridgeport 0.0 ppb
No 12
B-
596 Colchester 0.0 ppb
No 23
A-
597 Gillespie 0.0 ppb
No 14
C+
598 Vienna 0.0 ppb
No 17
B
599 Fairbury 0.0 ppb
No 1
A
600 Camp Point 0.0 ppb
No 6
B+
601 New Douglas 0.0 ppb
No 6
B
602 Hainesville 0.0 ppb
No 3
B+
603 South Jacksonville 0.0 ppb
No 3
C-
604 Gibson City 0.0 ppb
No 0
A
605 Forsyth 0.0 ppb
No 2
A-
606 Aledo 0.0 ppb
No 6
A+
607 Lena 0.0 ppb
No 1
A-
608 Mackinaw 0.0 ppb
No 1
A
609 Fulton 0.0 ppb
No 6
B
610 Abingdon 0.0 ppb
No 10
B+
611 Indian Head Park 0.0 ppb
No 1
B+
612 Momence 0.0 ppb
No 11
D+
613 Knoxville 0.0 ppb
No 21
A
614 Christopher 0.0 ppb
No 0
B+
615 Diamond 0.0 ppb
No 20
A-
616 Lakemoor 0.0 ppb
No 0
B+
617 Newton 0.0 ppb
No 0
A+
618 Marquette Heights 0.0 ppb
No 0
A
619 Bushnell 0.0 ppb
No 6
A
620 Havana 0.0 ppb
No 0
A-
621 Arcola 0.0 ppb
No 6
B+
622 Oak Brook Terr 0.0 ppb
No 7
B+
623 Mulkeytown 0.0 ppb
No 0
A-
624 Thompsonville 0.0 ppb
No 0
A-
625 Tamms 0.0 ppb
No 0
B+
626 El Paso 0.0 ppb
No 1
A-
627 Trenton 0.0 ppb
No 9
B+
628 Pawnee 0.0 ppb
No 7
A-
629 New Burnside 0.0 ppb
No 3
A-
630 Mason City 0.0 ppb
No 15
A
631 Carthage 0.0 ppb
No 18
A-
632 Farmington 0.0 ppb
No 24
A-
633 Davis Junction 0.0 ppb
No 0
B+
634 New Berlin 0.0 ppb
No 28
D
635 Lewistown 0.0 ppb
No 3
A-
636 Whittington 0.0 ppb
No 0
A-
637 Catlin 0.0 ppb
No 11
A-
638 Prospect Heights 0.0 ppb
No 9
B+
639 Dawson 0.0 ppb
No 0
C-
640 Nokomis 0.0 ppb
No 7
A
641 Buncombe 0.0 ppb
No 5
B
642 Merrionette Park 0.0 ppb
No 0
B
643 Polo 0.0 ppb
No 2
A
644 Seneca 0.0 ppb
No 10
A
645 Altamont 0.0 ppb
No 6
A-
646 East Dubuque 0.0 ppb
No 1
A-
647 Elwood 0.0 ppb
No 2
A-
648 Tamaroa 0.0 ppb
No 0
A-
649 Ava 0.0 ppb
No 2
B+
650 Belle Rive 0.0 ppb
No 0
A-
651 Palmyra 0.0 ppb
No 39
D
652 Sumner 0.0 ppb
No 6
B+
653 Prophetstown 0.0 ppb
No 2
B
654 Elmwood 0.0 ppb
No 9
A
655 Cuba 0.0 ppb
No 5
A-
656 Fisher 0.0 ppb
No 1
A-
657 Hinckley 0.0 ppb
No 11
A
658 Kirkland 0.0 ppb
No 1
A-
659 Roanoke 0.0 ppb
No 3
A-
660 Dix 0.0 ppb
No 0
A
661 New Athens 0.0 ppb
No 4
B+
662 Windsor 0.0 ppb
No 11
C-
663 Somonauk 0.0 ppb
No 2
A-
664 Lexington 0.0 ppb
No 2
B+
665 Minonk 0.0 ppb
No 8
A
666 Chenoa 0.0 ppb
No 19
F
667 Germantown 0.0 ppb
No 1
C+
668 Waltonville 0.0 ppb
No 0
A
669 South Roxana 0.0 ppb
No 0
B-
670 Pierron 0.0 ppb
No 10
B
671 Lacon 0.0 ppb
No 0
A
672 Lancaster 0.0 ppb
No 0
B+
673 Gardner 0.0 ppb
No 24
B+
674 East Carondelet 0.0 ppb
No 0
A-
675 De Pue 0.0 ppb
No 23
A-
676 Saint Jacob 0.0 ppb
No 4
B
677 Jonesboro 0.0 ppb
No 1
A
678 Stonington 0.0 ppb
No 0
A
679 Gilman 0.0 ppb
No 1
B+
680 Grantfork 0.0 ppb
No 2
C-
681 Olive Branch 0.0 ppb
No 0
B+
682 Roodhouse 0.0 ppb
No 1
B+
683 Long Grove 0.0 ppb
No 51
C-
684 Stockton 0.0 ppb
No 0
A+
685 Cambria 0.0 ppb
No 0
A
686 Crainville 0.0 ppb
No 2
A-
687 St Rose 0.0 ppb
No 8
D
688 Hoyleton 0.0 ppb
No 1
A-
689 Sheridan 0.0 ppb
No 0
A
690 Valrico 0.0 ppb
No 4
C+
691 Annapolis 0.0 ppb
No 1
B-
692 Neoga 0.0 ppb
No 32
B+
693 Grayville 0.0 ppb
No 0
A-
694 Benld 0.0 ppb
No 6
A-
695 Warsaw 0.0 ppb
No 12
A-
696 Cordova 0.0 ppb
No 2
B-
697 Erie 0.0 ppb
No 4
C+
698 Jerome 0.0 ppb
No 1
B+
699 Kincaid 0.0 ppb
No 4
B+
700 Manito 0.0 ppb
No 0
A-
701 Virginia 0.0 ppb
No 0
A
702 Roxana 0.0 ppb
No 0
A
703 Lanark 0.0 ppb
No 1
B+
704 Maple Park 0.0 ppb
No 18
B-
705 North Pekin 0.0 ppb
No 1
A-
706 Bethany 0.0 ppb
No 1
A-
707 Hodgkins 0.0 ppb
No 0
A-
708 Green Oaks 0.0 ppb
No 2
B-
709 Cerro Gordo 0.0 ppb
No 0
A-
710 Durand 0.0 ppb
No 3
B
711 Gridley 0.0 ppb
No 1
B+
712 Onarga 0.0 ppb
No 1
B+
713 Grandview 0.0 ppb
No 2
B+
714 Murrayville 0.0 ppb
No 0
B+
715 North Utica 0.0 ppb
No 25
B
716 Nilwood 0.0 ppb
No 6
B+
717 Malta 0.0 ppb
No 18
D
718 Danvers 0.0 ppb
No 48
B-
719 Tower Lakes 0.0 ppb
No 1
B-
720 Toluca 0.0 ppb
No 8
A
721 Capron 0.0 ppb
No 1
A-
722 Ashland 0.0 ppb
No 10
A-
723 Rossville 0.0 ppb
No 15
A-
724 Warren 0.0 ppb
No 0
B+
725 Harristown 0.0 ppb
No 0
A-
726 Assumption 0.0 ppb
No 4
C+
727 Walnut 0.0 ppb
No 3
B+
728 Toledo 0.0 ppb
No 0
A
729 Saint Elmo 0.0 ppb
No 13
A
730 Ladd 0.0 ppb
No 17
A
731 Hartford 0.0 ppb
No 2
A-
732 Chatsworth 0.0 ppb
No 0
B+
733 Hanna City 0.0 ppb
No 6
A
734 Albers 0.0 ppb
No 8
B-
735 Hillcrest 0.0 ppb
No 4
B+
736 Homer 0.0 ppb
No 1
A-
737 La Harpe 0.0 ppb
No 21
B-
738 Martinsville 0.0 ppb
No 3
B+
739 Nauvoo 0.0 ppb
No 20
B+
740 Saint Anne 0.0 ppb
No 3
C+
741 Waverly 0.0 ppb
No 22
A
742 Dowell 0.0 ppb
No 0
A-
743 Valier 0.0 ppb
No 0
A-
744 Minier 0.0 ppb
No 1
A
745 Walnut Hill 0.0 ppb
No 0
A+
746 Divernon 0.0 ppb
No 5
A-
747 Buffalo 0.0 ppb
No 0
B-
748 Atwood 0.0 ppb
No 4
A-
749 Gorham 0.0 ppb
No 1
A-
750 Mounds 0.0 ppb
No 2
B
751 Ridge Farm 0.0 ppb
No 2
C+
752 Oquawka 0.0 ppb
No 0
A+
753 Chebanse 0.0 ppb
No 6
B+
754 Crossville 0.0 ppb
No 0
A-
755 Hamel 0.0 ppb
No 0
B+
756 Irvington 0.0 ppb
No 0
A-
757 Cave-In-Rock 0.0 ppb
No 4
A-
758 Elkville 0.0 ppb
No 4
B
759 Goreville 0.0 ppb
No 2
B+
760 Thomasboro 0.0 ppb
No 1
B
761 Enfield 0.0 ppb
No 2
A
762 Shawneetown 0.0 ppb
No 0
B+
763 Coulterville 0.0 ppb
No 14
B+
764 Washburn 0.0 ppb
No 0
B+
765 Odell 0.0 ppb
No 14
A
766 Littleton 0.0 ppb
No 9
B+
767 South Pekin 0.0 ppb
No 0
B+
768 Mazon 0.0 ppb
No 1
B+
769 Galatia 0.0 ppb
No 0
B-
770 Newark 0.0 ppb
No 2
A-
771 Energy 0.0 ppb
No 0
A-
772 Raymond 0.0 ppb
No 0
A+
773 Ramsey 0.0 ppb
No 3
B+
774 Atkinson 0.0 ppb
No 3
B+
775 Leland 0.0 ppb
No 0
A-
776 Sheldon 0.0 ppb
No 0
B+
777 Kinmundy 0.0 ppb
No 14
A
778 Mansfield 0.0 ppb
No 2
A
779 Goodfield 0.0 ppb
No 6
A-
780 Avon 0.0 ppb
No 3
A-
781 Lawrencville 0.0 ppb
No 17
B
782 Beckemeyer 0.0 ppb
No 1
A
783 Gifford 0.0 ppb
No 0
B
784 Mcclure 0.0 ppb
No 0
B+
785 Argenta 0.0 ppb
No 0
B
786 Bismarck 0.0 ppb
No 1
B+
787 Franklin Grove 0.0 ppb
No 0
A-
788 Ridgway 0.0 ppb
No 7
B+
789 Paw Paw 0.0 ppb
No 1
A
790 Tallula 0.0 ppb
No 0
A-
791 Dahlgren 0.0 ppb
No 0
A-
792 Hanaford 0.0 ppb
No 0
B+
793 Chandlerville 0.0 ppb
No 6
B+
794 Alexis 0.0 ppb
No 3
B+
795 Newman 0.0 ppb
No 0
B+
796 Paloma 0.0 ppb
No 3
B+
797 Livingston 0.0 ppb
No 0
B+
798 West Salem 0.0 ppb
No 1
A
799 Noble 0.0 ppb
No 1
A-
800 Elizabeth 0.0 ppb
No 0
A
801 Franklin 0.0 ppb
No 3
A-
802 New Memphis 0.0 ppb
No 4
B+
803 Willisville 0.0 ppb
No 1
B+
804 Mclean 0.0 ppb
No 3
A-
805 Farmersville 0.0 ppb
No 0
A-
806 Hurst 0.0 ppb
No 3
B
807 Greenview 0.0 ppb
No 0
A-
808 North City 0.0 ppb
No 0
A
809 Dongola 0.0 ppb
No 0
A-
810 Camargo 0.0 ppb
No 7
B
811 Findlay 0.0 ppb
No 21
B-
812 Ogden 0.0 ppb
No 2
A-
813 Bluffs 0.0 ppb
No 0
A+
814 Keithsburg 0.0 ppb
No 0
A-
815 Stewardson 0.0 ppb
No 1
A
816 Tilden 0.0 ppb
No 3
B+
817 Tiskilwa 0.0 ppb
No 3
B+
818 Oakland 0.0 ppb
No 0
B+
819 Vermont 0.0 ppb
No 24
D
820 Brookport 0.0 ppb
No 1
B
821 Taylor Springs 0.0 ppb
No 4
A
822 Moro 0.0 ppb
No 1
B
823 Thayer 0.0 ppb
No 4
A-
824 Taylor Ridge 0.0 ppb
No 6
B+
825 Tonica 0.0 ppb
No 16
A
826 South Wilmington 0.0 ppb
No 20
B+
827 Oneida 0.0 ppb
No 3
A-
828 Fairmount 0.0 ppb
No 0
A-
829 Towanda 0.0 ppb
No 4
B-
830 Tampico 0.0 ppb
No 1
B
831 Potomac 0.0 ppb
No 1
B-
832 White Heath 0.0 ppb
No 1
A-
833 Creal Springs 0.0 ppb
No 3
B
834 Lenzburg 0.0 ppb
No 3
B
835 Westfield 0.0 ppb
No 4
C-
836 West City 0.0 ppb
No 0
A-
837 Cedarville 0.0 ppb
No 2
B+
838 Dalzell 0.0 ppb
No 1
B+
839 Chapin 0.0 ppb
No 1
B+
840 Omaha 0.0 ppb
No 3
A-
841 Niantic 0.0 ppb
No 0
A-
842 Coffeen 0.0 ppb
No 7
B
843 Ashmore 0.0 ppb
No 0
C
844 Bartelso 0.0 ppb
No 1
B+
845 Cisne 0.0 ppb
No 1
A-
846 Golconda 0.0 ppb
No 6
B+
847 St Libory 0.0 ppb
No 0
A
848 Creston 0.0 ppb
No 0
A-
849 Ursa 0.0 ppb
No 1
A
850 Keyesport 0.0 ppb
No 9
A-
851 Golden 0.0 ppb
No 0
A
852 Nebo 0.0 ppb
No 1
D
853 Hutsonville 0.0 ppb
No 5
A-
854 Liberty 0.0 ppb
No 2
A-
855 Raleigh 0.0 ppb
No 0
B+
856 Patoka 0.0 ppb
No 26
A-
857 Bedford Park 0.0 ppb
No 1
A+
858 Damiansville 0.0 ppb
No 4
C+
859 Baldwin 0.0 ppb
No 2
A
860 Davis 0.0 ppb
No 0
A
861 Fairview 0.0 ppb
No 15
A-
862 Saint Francisville 0.0 ppb
No 0
C+
863 Sawyerville 0.0 ppb
No 7
B
864 Williamsfield 0.0 ppb
No 5
A-
865 Godley 0.0 ppb
No 0
A-
866 Elkhart 0.0 ppb
No 6
B
867 Cullom 0.0 ppb
No 1
B+
868 Schram City 0.0 ppb
No 4
A-
869 Carlock 0.0 ppb
No 24
A-
870 Dorchester 0.0 ppb
No 8
A-
871 Grand Tower 0.0 ppb
No 2
A-
872 Sidell 0.0 ppb
No 0
A-
873 Mark 0.0 ppb
No 19
A-
874 Xenia 0.0 ppb
No 6
A-
875 Industry 0.0 ppb
No 2
A-
876 Lyndon 0.0 ppb
No 2
A-
877 Good Hope 0.0 ppb
No 4
A-
878 Wilsonville 0.0 ppb
No 6
A-
879 Burlington 0.0 ppb
No 5
B+
880 Mound City 0.0 ppb
No 0
A-
881 Belknap 0.0 ppb
No 0
A-
882 Grand Ridge 0.0 ppb
No 26
B+
883 Wapella 0.0 ppb
No 0
A
884 Colp 0.0 ppb
No 2
B-
885 West Union 0.0 ppb
No 0
A-
886 Beecher City 0.0 ppb
No 4
D+
887 Cornell 0.0 ppb
No 0
A
888 Dakota 0.0 ppb
No 0
A
889 Essex 0.0 ppb
No 14
B-
890 London Mills 0.0 ppb
No 1
A
891 Rankin 0.0 ppb
No 1
B+
FAQ

Frequently asked questions about lead in Illinois

Is lead in Illinois tap water a concern?

Yes — 24 of 891 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 Illinois 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 Illinois cities have the highest lead levels?

The cities with the highest 90th percentile lead levels in Illinois are: Vergennes (95.0 ppb), Little York (55.0 ppb), La Moille (54.8 ppb), Le Roy (49.0 ppb), Kansas (46.8 ppb). See the full ranked table above.

More contaminants

Other contaminants in Illinois

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