Safest Drinking Water in Michigan 2026
Michigan has 5 public water systems serving 1,507,083 people. The safest system is Grand Rapids in Grand Rapids with a score of 100/100.
Top 5 Water Systems in Michigan
| # | Water System | City | Pop. Served | Source | Violations | Score |
|---|---|---|---|---|---|---|
| 1 | Grand Rapids | Grand Rapids | 273,005 | Surface water | 0 | A (100) |
| 2 | Detroit City Of | Detroit | 633,218 | Surface water | 0 | A (94) |
| 3 | Ann Arbor | Ann Arbor | 241,868 | Surface water | 0 | B (89) |
| 4 | Lansing Board of Water & Light | Lansing | 166,000 | Ground water | 0 | B (82) |
| 5 | Kalamazoo | Kalamazoo | 192,992 | Ground water | 4 | F (36) |
Water quality data for Michigan is sourced from the EPA Safe Drinking Water Information System (SDWIS), which tracks compliance for all public water systems.
Frequently Asked Questions
Grand Rapids in Grand Rapids has the highest Water Safety Score in Michigan at 100/100 (Grade A), serving 273,005 people.
Michigan has 5 public water systems serving 1,507,083 people. The average Water Safety Score is 80/100.
The Water Safety Score (0-100) is based on health violations (40%), contaminant exceedances (30%), enforcement history (20%), and monitoring violations (10%). Higher scores mean cleaner, safer water.
Water Safety Score: health violations (40%), contaminant exceedances (30%), enforcement history (20%), monitoring violations (10%).
The this entity category groups every U.S. public drinking-water safety entity sharing this attribute. The list above is the data; the paragraphs below explain what the grouping means against the broader the EPA Safe Drinking Water Information System (SDWIS) distribution and how to read the relative rankings within the category.
For readers using this category as a starting point, the per-entity detail pages linked from the table above carry the underlying the EPA Safe Drinking Water Information System (SDWIS) data in full. The category-level view is the filter; the per-entity pages are the actual answer.
Source: EPA Ground Water and Drinking Water, 2026.