Waukesha, WI tap water
Supplied by Waukesha Water Utility. 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 a little ammonia. Some utilities switch to plain chlorine for a few weeks a year.
Safety for fish and shrimp
Nitrite (NO₂)
Not detected (Low)
Not detected in testing, so any nitrite in your tank comes from the tank itself.
From EPA monitoring data (2014–2017).
Nitrate (NO₃)
Not detected (Low)
Not detected in testing, so water changes lower your tank's nitrate well.
From EPA monitoring data (2012–2019).
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)
225–240 ppm
Typical 233 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From EPA monitoring data (2014–2017).
pH
7.5–7.6
Typical 7.5
Most community fish do well here. Stable water matters more than the exact number.
From EPA monitoring data (2015–2017).
- Waukesha Water Utility adds phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Waukesha, WI
Waukesha Water Utility
Serves all residents · Buys water from Milwaukee Waterworks · 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.