Kent County, Michigan: drinking water report. Kent County – Grand Rapids – serves about 660,000 residents.
Kent County – Grand Rapids – serves about 660,000 residents. The City of Grand Rapids draws from Lake Michigan via a 31-mile pipeline to its treatment plant on the lakeshore. Suburban communities use a mix of Grand Rapids wholesale water and independent groundwater systems. The Lake Michigan connection gives Grand Rapids a reliable, high-quality source that many inland Michigan cities lack.
Grand Rapids' Lake Michigan supply is clean at the source and well-treated. Michigan's adoption of MCLs for seven PFAS compounds has driven monitoring across all systems. UCMR5 data shows low-level PFAS detections in some Kent County systems, primarily in those using supplemental groundwater. Wolverine World Wide's former manufacturing facility in neighboring Rockford (Cascade Township area) contaminated local groundwater with PFAS from Scotchgard-treated shoe waste – one of the most publicized industrial PFAS cases in Michigan.
According to Michigan EGLE's 2024 data, the Wolverine-related contamination plume has affected private wells in the northern part of Kent County. Public water systems have largely been connected to clean sources, but the plume remains an active investigation.
Grand Rapids city water is clean. The PFAS risk is concentrated in areas near the Wolverine contamination plume in the northern county.
Check your water for data specific to your area. If you are on a private well in northern Kent County, PFAS testing is strongly recommended. Our water filter guide covers effective treatment options. Pull your detailed report, and visit our Michigan page for statewide data.
Drinking water is one exposure route. These federal datasets also cover Kent County, MI.
The EPA places Kent County, MI in Zone 2 - a moderate-risk category, with a predicted average indoor radon level between 2 and 4 pCi/L. Zone maps predict an area's radon potential from geology and existing indoor readings; they say nothing about a specific house. Testing is the only way to know your own level.
55% of homes in Kent County, MI were built before 1980, and 22% before 1950. Residential lead paint was banned in 1978, so housing age is the strongest available proxy for lead-paint exposure. This describes the county's housing stock, not any one home.
Modelled annual fine-particle pollution (PM2.5) in Kent County, MI averages 8.8 µg/m³, within the EPA's annual standard of 9 µg/m³. These are CDC modelled county estimates rather than readings from a specific monitor.
How radon zones work · Air quality by county · Lead exposure guide
Across 47 public water systems serving Kent County, MI with EPA lead testing on record, 3 (6.4%) reported a 90th-percentile lead result above the EPA's 15 ppb action level, and the median is 2 ppb. 14 water systems serving Kent County, MI carry a health-based EPA Safe Drinking Water Act violation.
| Most-cited violation type | Systems affected |
|---|---|
| Lead and Copper Rule | 4 |
| Arsenic | 2 |
| Ground Water Rule | 2 |
| Lead and Copper Rule Revisions | 2 |
| Revised Total Coliform Rule | 2 |
Source: EPA Lead and Copper Rule 90th-percentile tap sampling and EPA SDWIS Safe Drinking Water Act enforcement records, aggregated from the public water systems serving this county. Figures are counts of water systems, not a test of any individual home or tap.