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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
26–50 of 667City of Royal Oak
MI0005830 · 57,236 served
City of Farmington Hills
MI0002240 · 56,984 served
City of Novi
MI0004870 · 56,780 served
Ypsilanti Community Utility Authority
MI0007260 · 53,988 served
Holland Board of Public Works
MI0003190 · 49,687 served
Redford Township
MI0005640 · 49,504 served
West Bloomfield Township
MI0006975 · 49,479 served
Monroe
MI0004450 · 49,467 served
City of Roseville
MI0005820 · 47,299 served
Portage
MI0005520 · 46,292 served
City of Saginaw
MI0005850 · 44,058 served
Battle Creek - Verona System
MI0000450 · 43,975 served
City of Midland
MI0004370 · 42,547 served
Plainfield Township
MI0005370 · 42,271 served
Bloomfield Township
MI0000790 · 41,691 served
Chesterfield Township
MI0001390 · 41,650 served
Georgetown Township
MI0002620 · 41,086 served
Saginaw Charter Township
MI0005860 · 40,840 served
Lincoln Park
MI0003870 · 38,144 served
Byron-gaines Utility Authority
MI0001023 · 37,464 served
Muskegon
MI0004570 · 37,213 served
Kentwood
MI0003620 · 36,072 served
Monroe South County
MI0004455 · 33,816 served
City of Port Huron
MI0005480 · 33,800 served
Brownstown Township
MI0000940 · 33,194 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