Michigan tap water quality
1,391 community water systems serving 7.5 million people.
Data: U.S. EPA · How we read the data · How we check it
PFAS: EPA's 2023–2025 testing. Lead: results from the last five years. 33 more systems have no recent lead results in EPA's database.
Water systems with PFAS above the federal limit
Based on EPA's UCMR 5 results (2023–2025) compared to the April 2024 limits, the way EPA compares them. Systems have until 2029 to comply. Largest first.
- Kalamazoo Water System192,992 people · Groundwater · MichiganPFOS above limitAlso: PFOA detected · PFHxS detected · 4 health-based violations since 2016
- Independence Township Water System11,790 people · Groundwater · MichiganPFOA above limitAlso: PFOS above limit · PFHxS above limit · PFAS Hazard Index above limit
- Dundee Water System5,400 people · Purchased surface water · MichiganPFOA above limit
- Gladstone Water System4,632 people · Surface water · MichiganPFOS above limit
- Fremont Water System4,516 people · Groundwater · MichiganPFOA above limit
Michigan PFAS report: chart, rankings and data to download →
Michigan's own PFAS limits
Michigan enforces its own drinking water limits for PFAS (effective: 2020-08): PFNA 6 ppt, PFOA 8 ppt, PFHxA 400000 ppt, PFOS 16 ppt, PFHxS 51 ppt, PFBS 420 ppt, HFPO-DA 370 ppt. The federal limits are 4 ppt for PFOA and PFOS.
EGLE promulgated MCLs for seven PFAS in August 2020 under the state Safe Drinking Water Act.
Source: Michigan PFAS Response: Drinking Water MCLs, checked 2026-11-14. Utility pages compare each system's EPA results with these limits. State compliance is judged on the state's own sampling.
Largest water systems in Michigan
- City of Detroit633,218 people · Purchased surface water · MichiganNo PFAS above limits
- Grand Rapids Water System306,901 people · Surface water · MichiganNo PFAS above limits
- Kalamazoo Water System192,992 people · Groundwater · MichiganPFOS above limitAlso: PFOA detected · PFHxS detected · 4 health-based violations since 2016
- Lansing Board of Water & Light166,000 people · Groundwater · MichiganLithium above screening level
- City of Warren134,056 people · Purchased surface water · MichiganNo PFAS above limits
- City of Sterling Heights127,000 people · Purchased surface water · MichiganNo PFAS above limits
- Ann Arbor Water System123,851 people · Surface water · MichiganNo PFAS above limits
- Dearborn Water System109,976 people · Purchased surface water · MichiganNo PFAS above limits
- Clinton Township Water System100,513 people · Purchased surface water · MichiganNo PFAS above limits
- Canton Township Water System99,627 people · Surface water · MichiganNo PFAS above limits
- Livonia Water System96,942 people · Purchased surface water · MichiganNo PFAS above limits
- Macomb Township Water System90,000 people · Purchased surface water · MichiganNo PFAS above limits
- Troy Water System85,854 people · Purchased surface water · MichiganNo PFAS above limits
- Westland Water System85,420 people · Purchased surface water · MichiganNo PFAS above limits
- City of Flint81,252 people · Purchased surface water · MichiganNo PFAS above limitsAlso: 1 health-based violation since 2016
Michigan cities and towns
- Allen Park
- Ann Arbor
- Auburn Hills
- Battle Creek
- Bay City
- Brownstown charter
- Burton
- Byron
- Canton charter
- Chesterfield
- Commerce charter
- Dearborn
- Dearborn Heights
- Delta charter
- Detroit
- East Lansing
- Eastpointe
- Farmington Hills
- Flint
- Flint charter
- Grand Blanc charter
- Grand Rapids
- Hamtramck
- Independence charter
- Jackson
- Kalamazoo
- Kentwood
- Lansing
- Lincoln Park
- Livonia
- Lyon charter
- Macomb
- Madison Heights
- Meridian charter
- Midland
- Muskegon
- Northville
- Norton Shores
- Novi
- Oak Park
- Orion charter
- Plainfield charter
- Pontiac
- Port Huron
- Portage
- Redford charter
- Rochester Hills
- Roseville
- Royal Oak
- Saginaw
- Saginaw charter
- Southfield
- Southgate
- St. Clair Shores
- Sterling Heights
- Taylor
- Troy
- Van Buren charter
- Warren
- Waterford charter
- West Bloomfield charter
- White Lake charter
- Wyoming
Most health-based violations since 2016
- Benton Harbor Water System9,103 people · Surface water · MichiganNo PFAS above limitsAlso: 20 health-based violations since 2016
- Deerfield Water System943 people · Surface water · MichiganNot in EPA's PFAS sampleAlso: 19 health-based violations since 2016
- Yankee Springs Meadows Water System710 people · Groundwater · MichiganArsenic violationsAlso: Coliform bacteria violation
- Waters Edge Mh Community180 people · Groundwater · MichiganArsenic violationsAlso: Coliform bacteria violation
- The Pines of Goodrich Water System40 people · Groundwater · MichiganArsenic violations
- Nahma Township Water System95 people · Groundwater · MichiganHaloacetic acids (HAA5) violationsAlso: Total trihalomethanes (TTHM) violations
- Green Brook Estates Water System40 people · Groundwater · MichiganArsenic violationsAlso: Coliform bacteria violation
- Fenton Harbor Condominiums Water System40 people · Groundwater · MichiganArsenic violations
- Northwoods Community Water System238 people · Groundwater · MichiganArsenic violations
- Westhaven Mobile Home Park, LLC122 people · Groundwater · MichiganArsenic violations
- Battle Creek – Verona System43,975 people · Groundwater · MichiganTotal trihalomethanes (TTHM) violations
- Riga Township Water System266 people · Purchased surface water · MichiganTotal trihalomethanes (TTHM) violations
- Somerset Mobile Home Park Water System64 people · Groundwater · MichiganNitrate violations
- Pine Haven Estates Mhc Water System125 people · Groundwater · MichiganRadium (combined 226/228) violations
- Emmett Township Water System2,550 people · Purchased groundwater · MichiganTotal trihalomethanes (TTHM) violations
All Michigan utilities on this site
Every Michigan system serving 50,000+ people or with PFAS above a federal limit, A to Z. Download all 1,391 systems as CSV.
- Ann Arbor Water System
- Canton Township Water System
- City of Detroit
- City of Farmington Hills
- City of Flint
- City of Novi
- City of Royal Oak
- City of St. Clair Shores
- City of Sterling Heights
- City of Warren
- Clinton Township Water System
- Dearborn Heights Water System
- Dearborn Water System
- Dundee Water System
- Fremont Water System
- Genesee County Water System
- Gladstone Water System
- Grand Rapids Water System
- Independence Township Water System
- Kalamazoo Water System
- Lansing Board of Water & Light
- Livonia Water System
- Macomb Township Water System
- Pontiac Water System
- Rochester Hills Water System
- Shelby Township Water System
- Southfield Water System
- Taylor Water System
- Troy Water System
- Waterford Township
- Westland Water System
- Wyoming Water System
- Ypsilanti Community Utility Authority
Questions
Does Michigan tap water have PFAS?
EPA tested 311 community water systems in Michigan for 29 PFAS between 2023 and 2025. 15 had at least one regulated PFAS detected, and 5 had an entry-point average above a 2024 federal limit. Those 5 systems serve about 219,330 people (3% of people on community water in Michigan). Systems have until 2029 to meet the limits.
How many Michigan water systems have violations?
325 systems in Michigan had at least one health-based violation since 2016 (641 violations in total). 202 violations are currently listed as unaddressed.
Which Michigan water systems are over the lead action level?
26 systems had a lead 90th percentile above the 15 ppb action level in their most recent results from the last five years. Another 33 systems have no lead results in EPA's database from the last five years, including 26 whose last result was above the action level. Lead depends on each home's pipes, so a test of your own tap is the only way to know your level.
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.