Michigan water quality
Michigan has 10,762 active public water systems (26,705 on file total), 1,429 of them graded by TapGraded.
Grade distribution
Biggest water systems
DETROIT CITY OF
DETROIT, MI · 633,218 served
GRAND RAPIDS
GRAND RAPIDS, MI · 306,901 served
KALAMAZOO
KALAMAZOO, MI · 192,992 served
LANSING BOARD OF WATER & LIGHT
LANSING, MI · 166,000 served
WARREN, CITY OF
WARREN, MI · 134,056 served
STERLING HEIGHTS, CITY OF
STERLING HEIGHTS, MI · 127,000 served
ANN ARBOR
ANN ARBOR, MI · 123,851 served
DEARBORN
DEARBORN, MI · 109,976 served
CLINTON TOWNSHIP
CLINTON TOWNSHIP, MI · 100,513 served
CANTON TOWNSHIP
CANTON, MI · 99,627 served
Lowest-graded systems
Active, graded systems serving at least 10,000 people, ordered by lowest Tap Grade first.
BATTLE CREEK - VERONA SYSTEM
BATTLE CREEK, MI · 43,975 served
TAYLOR
TAYLOR, MI · 63,409 served
DEARBORN HEIGHTS
DEARBORN HEIGHTS, MI · 57,774 served
HAMTRAMCK
HAMTRAMCK, MI · 28,433 served
INKSTER
INKSTER, MI · 25,076 served
KALAMAZOO
KALAMAZOO, MI · 192,992 served
GROSSE ILE TOWNSHIP
GROSSE ILE, MI · 10,788 served
GARDEN CITY
GARDEN CITY, MI · 27,625 served
BAY CITY, CITY OF
BAY CITY, MI · 32,255 served
REDFORD TOWNSHIP
REDFORD, MI · 49,504 served
Cities in Michigan
Source: EPA SDWIS/ECHO · Data as of 2026Q2