Geronimo, OK tap water
Supplied mostly by Cotton Co RWD #2, plus 2 other utilities. 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
Nitrate (NO₃)
Supplier's figure0.6–1.4 ppm (Low)
Typical 1 ppm
Low, so water changes lower your tank's nitrate well.
From the utility that supplies yours: Lawton, which supplies Geronimo (2014–2015).
Water chemistry
General hardness
Area estimate26–439 ppm
Typical 224 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 state (2000–2021).
Carbonate hardness (alkalinity)
Supplier's figure148–156 ppm
Typical 149 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From the utility that supplies yours: Lawton, which supplies Geronimo; Walters Public Works Authority, which supplies Comanche Co RWD #3, measured before treatment (2012–2019).
pH
Area estimate6.6–7.9
Typical 7.1
Most community fish do well here. Stable water matters more than the exact number.
Area estimate from nearby wells: USGS well samples in your state (2000–2022).
Total dissolved solids
Area estimate105–666 ppm
Typical 313 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 state (2000–2021).
- Geronimo adds phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Geronimo, OK
Cotton Co RWD #2
Serves 56% of residents · Groundwater (wells) · Chlorine
Geronimo
Serves 34% of residents · Buys water from Lawton · Chloramine
Comanche Co RWD #3
Serves 5% of residents · Buys water from Walters Public Works Authority · 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.