Williamsville, NY tap water
Part of Williamsville is supplied by Ecwa Amherst, plus 1 other utility. Here's what its water means for your fish.
Disinfectant
Chlorine
Utility water here is treated with chlorine. It slowly gases off from standing water, and any water conditioner removes it.
Safety for fish and shrimp
Nitrate (NO₃)
Supplier's figure0.8–1 ppm (Low)
Typical 0.8 ppm
Low, so water changes lower your tank's nitrate well.
From the utility that supplies it: Ecwa Direct, which supplies Ecwa Amherst; EPA monitoring data (2012–2019).
Copper at home taps (first draw)
0.02–0.04 ppm (Low)
The 90th percentile of first-draw samples from homes: water that sat in household pipes for at least six hours.
Low. Water that sits in household pipes overnight can carry more than this.
Published by the utility: Erie County Water Authority's 2025 water quality report.
Chlorine or chloramine at the tap
0.8–1.8 ppm
Typical 1.6 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 the utility: Erie County Water Authority's 2025 water quality report.
Water chemistry
General hardness
Not published yet
We haven't found this number yet. A drop test kit gives you your exact reading.
Carbonate hardness (alkalinity)
Not published yet
We haven't found this number yet. A drop test kit gives you your exact reading.
pH
Supplier's figure7.6–8.3
Typical 8
Most community fish do well here. Stable water matters more than the exact number.
From the utility that supplies it: Ecwa Direct, which supplies Ecwa Amherst; Erie County Water Authority's 2025 water quality report.
Who supplies Williamsville, NY
Ecwa Amherst
Serves 24% of residents · Buys water from Ecwa Direct · Chlorine
- 2025 water quality report
Erie County Water Authority
Serves 9% of residents · Lake or river water · Chlorine
We couldn't fully map which utility serves Williamsville. These numbers come from the utilities we matched, which serve about 33% of residents.
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.