Forest Hills, MI tap water
Supplied mostly by City of Grand Rapids, plus 1 other utility. Here's what the water means for your fish.
Disinfectant
Chlorine
Your water is treated with chlorine. It slowly gases off from standing water, and any water conditioner removes it.
Safety for fish and shrimp
Nitrate (NO₃)
3.1 ppm (Low)
Low, so water changes lower your tank's nitrate well.
From City of Grand Rapids' 2025 water quality report; Grand Rapids, which supplies Ada Township.
Copper at home taps (first draw)
Up to 0.1 ppm (Low)
The 90th percentile of first-draw samples from homes: water that sat in household pipes for at least six hours.
Not detected in testing. Water that sits in household pipes overnight can still pick some up.
Published by your utility: City of Grand Rapids' 2025 water quality report.
Chlorine or chloramine at the tap
0.1–1.5 ppm
Typical 1 ppm
At tap levels, chlorine and chloramine are toxic to fish, shrimp and the bacteria in a filter. Water conditioners are made for this range.
Published by your utility: City of Grand Rapids' 2025 water quality report.
Water chemistry
General hardness
137–188 ppm
Typical 158 ppm
Moderately hard. Great for livebearers, and most community fish adapt.
From City of Grand Rapids' website; Grand Rapids, which supplies Ada Township.
Carbonate hardness (alkalinity)
Not published yet
We haven't found this number yet. A drop test kit gives you your exact reading.
pH
7–8.5
Typical 7.4
Most community fish do well here. Stable water matters more than the exact number.
From City of Grand Rapids' website; Grand Rapids, which supplies Ada Township.
Total dissolved solids
168–233 ppm
Typical 181 ppm
A rough measure of everything dissolved in the water. RO water reads near 0, so TDS is a quick way to compare waters.
From City of Grand Rapids' website; Grand Rapids, which supplies Ada Township.
- City of Grand Rapids and Ada Township add phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Forest Hills, MI
- 2025 water quality report
City of Grand Rapids
Serves 41% of residents · Lake or river water · Chlorine
Ada Township
Serves 26% of residents · Buys water from Grand Rapids · Chlorine
Our data comes from public records and is still incomplete. Many utilities don't publish every number, so we're adding more all the time. Your city's range is a starting point: testing your own tap is the only way to know exactly what's in it.
Tap water lookup covers US cities only for now. Want to know why it matters? Read our story on tap water.
Compiled by Shoal & Stem from public records. Free to cite with a link.