Key West, FL tap water
Supplied by Fkaa - Florida Keys R.O. Plants. Here's what its water means for your fish.
Disinfectant
Not confirmed
We couldn't confirm how your water is disinfected. US utilities use chlorine or chloramine, and chloramine doesn't gas off when water sits out.
Safety for fish and shrimp
Nitrate (NO₃)
Area estimateUp to 20 ppm (Low)
Typical 2.6 ppm
Low, so water changes lower your tank's nitrate well.
Area estimate from nearby wells: USGS well samples in your state (2000–2020).
Water chemistry
General hardness
Area estimate63–504 ppm
Typical 234 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 (2000–2023).
Carbonate hardness (alkalinity)
Area estimate46–289 ppm
Typical 169 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
Area estimate from nearby wells: USGS well samples in your state (2000–2023).
pH
Area estimate5.9–7.8
Typical 7.3
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 (2000–2023).
Total dissolved solids
Area estimate71–909 ppm
Typical 275 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 (2000–2023).
Who supplies Key West, FL
Fkaa - Florida Keys R.O. Plants
Serves all residents · Groundwater (wells) · Disinfectant not listed
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.