Topeka, KS tap water
Supplied by City of Topeka. Here's what its water means for your fish.
Disinfectant
Chloramine
Your water is treated with chloramine. Unlike chlorine, it doesn't gas off when water sits out, and many pitcher and fridge filters aren't rated to remove it. Conditioners that list chloramine on the label break it apart, which frees about 0.8 ppm of ammonia here. Some utilities switch to plain chlorine for a few weeks a year.
Safety for fish and shrimp
Ammonia (with conditioner)
Estimate0.8 ppm (Worth knowing)
This is what a conditioner frees when it breaks the chloramine apart. A cycled filter clears it within a day; a big water change in a new or very small tank adds more of it at once. Some conditioners also bind ammonia for a day or so.
Estimated from the chloramine level City of Topeka reports (2024).
Nitrate (NO₃)
2.7–5.8 ppm (Low)
Typical 5.8 ppm
Water changes can't take your tank's nitrate below this level.
Published by your utility: City of Topeka's 2024 water quality report.
Copper at home taps (first draw)
Up to 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 your utility: City of Topeka's 2024 water quality report.
Chlorine or chloramine at the tap
3.3 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 Topeka's 2024 water quality report.
Water chemistry
General hardness
116–208 ppm
Typical 154 ppm
Moderately hard. Great for livebearers, and most community fish adapt.
Published by your utility: City of Topeka's 2024 water quality report.
Carbonate hardness (alkalinity)
62–125 ppm
Typical 84 ppm
Moderate buffering. pH should stay fairly steady.
Published by your utility: City of Topeka's 2024 water quality report.
pH
9.2–9.8
Typical 9.5
Alkaline. Many utilities raise pH to protect pipes. Stability matters more than the exact number.
Published by your utility: City of Topeka's 2024 water quality report.
Total dissolved solids
250 ppm
A rough measure of everything dissolved in the water. RO water reads near 0, so TDS is a quick way to compare waters.
Published by your utility: City of Topeka's 2024 water quality report.
- City of Topeka softens its water at the plant, so it may be softer than the local groundwater.
Who supplies Topeka, KS
- 2024 water quality report
City of Topeka
Serves 99% of residents · Lake or river water · 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.
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.