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Michigan Water Quality
667
Utilities in database
7.3M
Residents served
42%
On private wells
2
Key contaminants tracked
Drinking Water in Michigan
Michigan has 667 community water systems serving approximately 7.3 million residents. Primary water sources include groundwater. The most commonly reported contaminants include lead, disinfection byproducts. 42% of Michigan residents rely on private wells. EGLE holds primary enforcement authority under the Safe Drinking Water Act.
Utilities in Michigan
201–225 of 667Dowagiac
MI0001860 · 6,350 served
Huntington Woods
MI0003310 · 6,200 served
City of Manistee
MI0004030 · 6,200 served
City of Richmond
MI0005670 · 6,200 served
Northville
MI0004830 · 6,119 served
Carrollton Township
MI0001160 · 6,103 served
Ash Township
MI0000245 · 5,959 served
Allegan
MI0000120 · 5,930 served
St. Clair Water and Sewer Authority
MI0006284 · 5,847 served
Charter Township of Alpena
MI0000170 · 5,839 served
Sims-whitney Utilities Auth.
MI0006073 · 5,815 served
City of Swartz Creek
MI0006505 · 5,800 served
White Lake Township
MI0007065 · 5,799 served
Belding
MI0000560 · 5,769 served
Village of New Haven
MI0004690 · 5,600 served
Upper Michigan Water Company
MI0004800 · 5,535 served
City of Cheboygan
MI0001360 · 5,500 served
Lansing Township
MI0003770 · 5,500 served
City of St. Clair
MI0006270 · 5,485 served
Kingsford
MI0003640 · 5,480 served
Chelsea
MI0001370 · 5,474 served
Williams Township
MI0007125 · 5,444 served
City of Grosse Pointe
MI0002880 · 5,421 served
Dundee
MI0001880 · 5,400 served
Ironwood
MI0003420 · 5,387 served
Key Contaminant Concerns in Michigan
Lead
Lead is a naturally occurring heavy metal that was widely used in plumbing infrastructure until it was banned for new installations in 1986. An estimated 9.2 million lead service lines still connect homes to public water mains across the United States, along with millions of homes with lead solder in their internal plumbing.
DBPs
When utilities add chlorine to water to kill pathogens, it reacts with dissolved organic matter — leaves, algae, soil — to produce disinfection byproducts (DBPs). Over 600 DBPs have been identified. The EPA regulates two groups: total trihalomethanes (TTHMs, including chloroform) and haloacetic acids (HAA5). DBP levels tend to be highest in surface water systems and in warm months when organic matter is elevated.
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Data source: Utility data from EPA SDWIS. 667 active community water systems ingested. CCR contaminant data ingestion in progress.
Last updated: 2026-04-17