Covelo, CA tap water
About 27% of Covelo 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 (2015).
Nitrate (NO₃)
Up to 10 ppm (Low)
Typically not detected
Not detected in testing, so water changes lower your tank's nitrate well.
From EPA monitoring data; California Water Board lab results, measured before treatment (2012–2025).
Copper at home taps
Not detected (Low)
Not detected in testing. Water that sits in household pipes overnight can still pick some up.
From California Water Board lab results (2025).
Water chemistry
General hardness
Area estimate37–253 ppm
Typical 117 ppm
Moderately soft to medium. Suits most community fish and plants.
Area estimate from nearby wells: USGS well samples in your county (2009–2020).
Carbonate hardness (alkalinity)
Area estimate52–222 ppm
Typical 120 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
Area estimate from nearby wells: USGS well samples in your county (2009–2020).
pH
Area estimate6.5–7.5
Typical 7
Most community fish do well here. Stable water matters more than the exact number.
Area estimate from nearby wells: USGS well samples in your county (2009–2020).
Total dissolved solids
Area estimate114–269 ppm
Typical 173 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 (2009–2020).
- Covelo Mobile Home Park adds phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Covelo, CA
Round Valley Piner
Serves 15% of residents · Groundwater (wells) · Chlorine
Covelo Mobile Home Park
Serves 12% 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.