EWG's Tap Water Database — 2021 UPDATE

Search Results:

Largest utilities by state:

Utility name	City	People served
Altoona Water Supply	Altoona	Population served: 14,541
Ames Water Treatment Plant	Ames	Population served: 50,029
Boone Water Works	Boone	Population served: 12,909
Burlington Municipal Waterworks	Burlington	Population served: 25,619
Carroll Municipal Water Supply	Carroll	Population served: 10,103
Cedar Falls Municipal Water Utilities	Cedar Falls	Population served: 39,260
Cedar Rapids Water Department	Cedar Rapids	Population served: 128,201
Central IA Water Assn (Waverly)	Newton	Population served: 34,245
City of Ankeny	Ankeny	Population served: 54,598
Clive Water Department	Clive	Population served: 15,447
Coralville Muni Water System	Coralville	Population served: 18,907
Council Bluffs Water Works	Council Bluffs	Population served: 63,795
Des Moines Water Works	Des Moines	Population served: 233,020
Dubuque Water Works	Dubuque	Population served: 57,637
Fort Dodge Water Supply	Fort Dodge	Population served: 25,206
Ft Madison Muni Water Works	Fort Madison	Population served: 11,378
Indianola Water Supply	Indianola	Population served: 14,782
Iowa City Water Department	Iowa City	Population served: 63,265
Iowa-American Water Co-Clinton District	Clinton	Population served: 26,885
Iowa-American Water Company - Davenport	Davenport	Population served: 137,201
ISU	Ames	Population served: 31,453
Johnston Municipal Water Supply	Johnston	Population served: 17,306
Keokuk Municipal Water Works	Keokuk	Population served: 10,780
Marion Municipal Water Department	Marion	Population served: 34,610
Marshalltown Water Works	Marshalltown	Population served: 27,612
Mason City Water Department	Mason City	Population served: 28,079
Muscatine Power & Water	Muscatine	Population served: 24,386
Newton Water Supply	Newton	Population served: 16,262
North Liberty Water Supply	North Liberty	Population served: 13,386
Oskaloosa Municipal Water Department	Oskaloosa	Population served: 12,173
Ottumwa Water Works	Ottumwa	Population served: 25,023
Pella Water Works Department	Pella	Population served: 10,352
Poweshiek Water Association	Tama	Population served: 18,836
Rathbun Regional Water Assn	Centerville	Population served: 28,215
Sioux City Water Supply	Sioux City	Population served: 82,759
SIRWA #2 (Creston)	Creston	Population served: 18,510
Spencer Municipal Water Utility	Spencer	Population served: 11,235
Storm Lake Water Treatment Plant	Storm Lake	Population served: 10,892
University Water System	Iowa City	Population served: 26,684
Urbandale Water Utility	Urbandale	Population served: 39,463
Wapello Rural Water Assoc.	Ottumwa	Population served: 15,601
Warren Water District	Indianola	Population served: 18,045
Waterloo Water Works	Waterloo	Population served: 70,070
Waukee Water Supply	Waukee	Population served: 13,790
West Des Moines Water Works	West Des Moines	Population served: 56,609

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