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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
326–350 of 667Munising
MI0004560 · 2,783 served
City of Keego Harbor
MI0003595 · 2,740 served
Watervliet
MI0006930 · 2,735 served
Marquette Township
MI0004140 · 2,700 served
City of Vassar
MI0006780 · 2,697 served
Hartford
MI0003070 · 2,688 served
City of Sandusky
MI0005920 · 2,679 served
Village of Almont
MI0000150 · 2,674 served
City of Potterville
MI0005550 · 2,617 served
Ontonagon
MI0005030 · 2,607 served
Newaygo
MI0004710 · 2,571 served
Mattawan
MI0004177 · 2,550 served
Emmett Township
MI0002125 · 2,550 served
City of Clio
MI0001490 · 2,515 served
Spring Lake
MI0006230 · 2,512 served
Forsyth Township
MI0002370 · 2,479 served
Montague
MI0004470 · 2,479 served
City of Croswell
MI0001690 · 2,447 served
Fennville
MI0002260 · 2,438 served
Village of Cass City
MI0001220 · 2,428 served
City of Reed City
MI0005650 · 2,425 served
Bronson
MI0000910 · 2,421 served
Clyde Township
MI0001493 · 2,400 served
Village of Chesaning
MI0001380 · 2,394 served
Galesburg
MI0002530 · 2,377 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.
Michigan Water FAQs
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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