State Hub
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
126–150 of 667City of South Lyon
MI0006110 · 11,055 served
Midland Co., Water Dist. No. 1 of
MI0004375 · 11,000 served
Grosse Ile Township
MI0002870 · 10,788 served
Port Huron Township
MI0005490 · 10,654 served
Flat Rock
MI0002300 · 10,541 served
Beverly Hills
MI0000690 · 10,451 served
Grand Haven
MI0002750 · 10,412 served
Oxford Township
MI0005138 · 10,407 served
Big Rapids
MI0000710 · 10,403 served
City of Cadillac
MI0001030 · 10,355 served
City of Brighton
MI0000860 · 10,210 served
City of Alpena
MI0000160 · 10,128 served
Bridgeport Township
MI0000840 · 10,104 served
City of Marysville
MI0004160 · 9,959 served
Muskegon Heights
MI0004580 · 9,917 served
City of Howell
MI0003250 · 9,914 served
Berlin Township
MI0000635 · 9,900 served
Clay Township
MI0001450 · 9,866 served
Grosse Pointe Farms
MI0002890 · 9,757 served
Hampton Township
MI0002960 · 9,652 served
Sumpter Township
MI0006460 · 9,576 served
Beecher Metropolitan District
MI0000540 · 9,400 served
Spring Lake Township
MI0006235 · 9,393 served
Lyon Township
MI0003968 · 9,390 served
Fruitport Township
MI0002507 · 9,355 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