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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
51–75 of 667Jackson
MI0003470 · 33,165 served
Orion Township
MI0005035 · 33,000 served
City of East Lansing
MI0001990 · 33,000 served
City of Eastpointe
MI0001950 · 32,442 served
City of Bay City
MI0000470 · 32,255 served
Northville Township
MI0004845 · 32,103 served
Southgate
MI0006170 · 30,047 served
Madison Heights
MI0004000 · 29,694 served
Oak Park
MI0004880 · 29,654 served
Allen Park
MI0000130 · 28,210 served
Garden City
MI0002550 · 27,625 served
Plymouth Township
MI0005420 · 27,524 served
Van Buren Township
MI0006770 · 27,359 served
Southwest Michigan Regional Sanitary Sew
MI0003726 · 26,780 served
Holland Township Consolidated
MI0003195 · 26,100 served
Wyandotte
MI0007210 · 25,883 served
Meridian Township
MI0004260 · 25,600 served
Summit Township
MI0006450 · 25,355 served
Inkster
MI0003360 · 25,076 served
Pittsfield Township
MI0005360 · 24,500 served
Harrison Township
MI0003040 · 24,314 served
Norton Shores
MI0004850 · 23,994 served
Romulus
MI0005785 · 23,989 served
Adrian
MI0000040 · 23,663 served
Hamtramck
MI0002970 · 22,413 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