Lannon, WI tap water
About 3% of Lannon is inside a utility's service area. Homes outside it likely use private wells, which no utility tests.
Disinfectant
Chlorine
Utility water here is treated with chlorine. It slowly gases off from standing water, and any water conditioner removes it. Private wells aren't treated by a utility, so there's no chlorine or chloramine unless a treatment system adds it.
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)
4.3 ppm (Low)
Low, so water changes lower your tank's nitrate well.
From EPA monitoring data (2012–2016).
Water chemistry
General hardness
Area estimate239–540 ppm
Typical 401 ppm
Hard. Ideal for livebearers and African cichlids. Soft-water species may struggle to breed.
Area estimate from nearby wells: USGS well samples in your county (2000–2021).
Carbonate hardness (alkalinity)
341 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From EPA monitoring data (2017).
pH
8.3
Alkaline. Many utilities raise pH to protect pipes. Stability matters more than the exact number.
From EPA monitoring data (2017).
Total dissolved solids
Area estimate126–709 ppm
Typical 425 ppm
A rough measure of everything dissolved in the water. RO water reads near 0, so TDS is a quick way to compare waters.
Area estimate from nearby wells: USGS well samples in your county (2000–2021).
Who supplies Lannon, WI
Lannon Water Utility
Serves 3% of residents · Groundwater (wells) · 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.