Wisconsin Water Quality
1,021 water systems serving 4,230,296 people. 4,618 total violations on record.
Safety Grade Distribution
A
779
76%
B
59
6%
C
150
15%
D
24
2%
F
9
1%
1,021
Water Systems
4,230,296
Population Served
4,618
Total Violations
451
Health-Based
Most Contaminated Systems
BIT O GREEN LLC MHP
49 served154 violations154 recent
C
MIDDLETON WATERWORKS
23,868 served148 violations148 recent
C
GRATIOT WATERWORKS
224 served127 violations122 recent
D
52ND AVE WATER GROUP
35 served193 violations112 recent
D
SPRING GREEN ESTATES NORTH
32 served89 violations89 recent
C
DICKEYVILLE WATERWORKS
1,069 served84 violations84 recent
C
MILWAUKEE WATERWORKS
626,000 served83 violations77 recent
C
RIVER SPRINGS APARTMENTS LLC
38 served84 violations77 recent
C
EAGLE CHATEAU APTS
125 served57 violations50 recent
C
JEFFERSON WATERWORKS
7,926 served48 violations46 recent
F
Cleanest Water Systems
GREEN BAY WATERWORKS
107,369 served0 violations
A
RACINE WATERWORKS
105,100 served10 violations
A
KENOSHA WATER UTILITY
99,218 served4 violations
A
APPLETON WATERWORKS
74,511 served0 violations
A
WAUKESHA WATER UTILITY
70,718 served0 violations
A
EAU CLAIRE WATERWORKS
70,587 served0 violations
A
JANESVILLE WATER UTILITY
64,415 served1 violations
A
OSHKOSH WATERWORKS
63,000 served0 violations
A
LA CROSSE WATERWORKS
53,000 served0 violations
A
SHEBOYGAN WATER UTILITIES
49,931 served0 violations
A
Largest Water Systems in Wisconsin
| Water System | Grade | Population | Violations |
|---|---|---|---|
| MILWAUKEE WATERWORKS | C | 626,000 | 83 |
| MADISON WATER UTILITY | C | 272,000 | 4 |
| GREEN BAY WATERWORKS | A | 107,369 | 0 |
| RACINE WATERWORKS | A | 105,100 | 10 |
| KENOSHA WATER UTILITY | A | 99,218 | 4 |
| APPLETON WATERWORKS | A | 74,511 | 0 |
| WAUKESHA WATER UTILITY | A | 70,718 | 0 |
| EAU CLAIRE WATERWORKS | A | 70,587 | 0 |
| JANESVILLE WATER UTILITY | A | 64,415 | 1 |
| WEST ALLIS WATERWORKS | B | 63,240 | 4 |
| OSHKOSH WATERWORKS | A | 63,000 | 0 |
| LA CROSSE WATERWORKS | A | 53,000 | 0 |
| SHEBOYGAN WATER UTILITIES | A | 49,931 | 0 |
| WAUWATOSA WATERWORKS | A | 49,064 | 3 |
| FOND DU LAC WATERWORKS | A | 44,303 | 0 |
| WAUSAU WATERWORKS | A | 39,994 | 0 |
| BELOIT CITY OF | B | 36,677 | 11 |
| NORTH SHORE WATER COMMISSION | A | 35,598 | 4 |
| MANITOWOC WATERWORKS | A | 34,500 | 0 |
| SUN PRAIRIE UTILITIES | C | 33,966 | 5 |
Contaminants in Wisconsin
Cities in Wisconsin
MILWAUKEE(20)MADISON(17)GREEN BAY(6)RACINE(4)KENOSHA(6)APPLETON(3)WAUKESHA(7)EAU CLAIRE(5)OSHKOSH(4)JANESVILLE(2)West Allis(1)NEENAH(3)SHEBOYGAN(3)LA CROSSE(6)Wauwatosa(1)WAUSAU(6)FOND DU LAC(6)DE PERE(4)BELOIT(1)MANITOWOC(3)SUN PRAIRIE(2)WEST BEND(5)Oak Creek(1)STEVENS POINT(18)Brookfield(1)NEW BERLIN(1)SUPERIOR(2)MENOMONEE FALLS(2)FITCHBURG(4)MIDDLETON(3)WATERTOWN(2)FRANKLIN(2)GRAND CHUTE(1)SOUTH MILWAUKEE(1)WISCONSIN RAPIDS(3)MENASHA(2)GERMANTOWN(1)MARSHFIELD(6)Cudahy(1)KAUKAUNA(3)Onalaska(1)PEWAUKEE(10)ASHWAUBENON(1)HUDSON(1)MEQUON(25)BEAVER DAM(2)River Falls(1)WESTON(1)WAUNAKEE(5)Menomonie(1)HARTFORD(1)Oconomowoc(1)BARABOO(5)Greendale(1)WHITEWATER(3)SHAWANO(2)VERONA(1)SHOREWOOD(1)CHIPPEWA FALLS(2)PLOVER(1)STOUGHTON(1)GLENDALE(1)PORT WASHINGTON(1)BROWN DEER(1)GRAFTON(5)FORT ATKINSON(2)OREGON(3)PLATTEVILLE(1)LITTLE CHUTE(1)CEDARBURG(1)Sussex(1)GREENVILLE(2)TWO RIVERS(2)PORTAGE(2)MONROE(3)BURLINGTON(6)PLEASANT PRAIRIE(2)MARINETTE(1)NEW RICHMOND(1)ELKHORN(3)DEFOREST(1)PLYMOUTH(3)Holmen(2)FORT MCCOY(2)Sparta(1)REEDSBURG(1)MUSKEGO(5)MERRILL(2)STURGEON BAY(1)MCFARLAND(1)Altoona(1)Lake Geneva(2)COTTAGE GROVE(1)HARTLAND(1)TOMAH(1)RICE LAKE(2)MONONA(1)DELAVAN(3)MUKWONAGO(3)SHEBOYGAN FALLS(2)