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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
301–325 of 667City of Ithaca
MI0003460 · 3,098 served
Homer Township
MI0003223 · 3,097 served
City of Mount Morris
MI0004520 · 3,086 served
Blumfield-reese Water Auth.
MI0000798 · 3,024 served
Hartland Township
MI0003075 · 3,022 served
Iron River
MI0003410 · 3,019 served
Lenox Township
MI0003836 · 3,000 served
K I Sawyer
MI0003510 · 3,000 served
Andrews University
MI0000210 · 3,000 served
St. Ignace
MI0006290 · 2,987 served
Village of Lake Orion
MI0003740 · 2,973 served
Bangor-monitor Metro District
MI0000400 · 2,971 served
Village of Fowlerville
MI0002400 · 2,951 served
City of Gladwin
MI0002650 · 2,933 served
Grosse Pointe Shores
MI0002910 · 2,929 served
Vicksburg
MI0006800 · 2,906 served
Whitehall
MI0007100 · 2,902 served
Burtchville Township
MI0001008 · 2,900 served
Larkin Township
MI0003794 · 2,878 served
Pleasant Ridge
MI0005390 · 2,872 served
New Buffalo Township
MI0004685 · 2,845 served
City of Rogers City
MI0005770 · 2,827 served
Chikaming Township
MI0001400 · 2,825 served
City of East Tawas
MI0002010 · 2,808 served
Blair Township
MI0000743 · 2,788 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