Sharonville, OH tap water
Supplied mostly by Greater Cincinnati Water Works (GCWW), plus 1 other utility. Here's what the water means for your fish.
Disinfectant
Chlorine or chloramine
Utilities here use chlorine or chloramine, depending on which one serves your address. Chlorine slowly gases off from standing water; chloramine doesn't.
Safety for fish and shrimp
Ammonia (with conditioner)
Estimate0.19–0.97 ppm (Low)
Typical 0.19 ppm
This is what a conditioner frees when it breaks the chloramine apart. A cycled filter clears it within a day.
Estimated from the chloramine level Butler Co. Water District 2 PWS reports.
Nitrite (NO₂)
Not detected (Low)
Not detected in testing, so any nitrite in your tank comes from the tank itself.
From EPA monitoring data (2012–2017).
Nitrate (NO₃)
Up to 5.5 ppm (Low)
Typical 4.9 ppm
Low, so water changes lower your tank's nitrate well.
From Greater Cincinnati Water Works (GCWW)'s 2025 water quality report; Hamilton Public Water System and Cincinnati Public Water System, which supplies Butler Co. Water District 2 PWS (2012–2025).
Copper at home taps (first draw)
0.02–0.43 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 your utility: Greater Cincinnati Water Works (GCWW)'s 2025 water quality report.
Chlorine or chloramine at the tap
0.8–4 ppm
Typical 1.2 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: Greater Cincinnati Water Works (GCWW)'s 2025 water quality report; Butler Co. Water District 2 PWS's water quality report.
Water chemistry
General hardness
126–140 ppm
Typical 126 ppm
Moderately soft to medium. Suits most community fish and plants.
Published by your utility: Greater Cincinnati Water Works (GCWW)'s 2025 water quality report; Butler Co. Water District 2 PWS's water quality report.
Carbonate hardness (alkalinity)
70–74 ppm
Typical 74 ppm
Moderate buffering. pH should stay fairly steady.
From EPA monitoring data; Butler Co. Water District 2 PWS's water quality report (2018).
pH
7–10.5
Typical 8.9
Alkaline. Many utilities raise pH to protect pipes. Stability matters more than the exact number.
From EPA monitoring data; Butler Co. Water District 2 PWS's water quality report (2018).
- Greater Cincinnati Water Works (GCWW) and Butler Co. Water District 2 PWS add phosphate to protect pipes. It can feed algae in tanks without much plant growth.
- Greater Cincinnati Water Works (GCWW) and Butler Co. Water District 2 PWS soften their water at the plant, so it may be softer than the local groundwater.
Who supplies Sharonville, OH
- 2025 water quality report
Greater Cincinnati Water Works (GCWW)
Serves 88% of residents · Lake or river water · Chlorine
- Water quality report
Butler Co. Water District 2 PWS
Serves 9% of residents · Buys water from Hamilton Public Water System · Chloramine
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.
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Compiled by Shoal & Stem from public records. Free to cite with a link.