Graton, CA tap water
Part of Graton is supplied by Blue Spruce Mobile Home Park. Here's what its water means for your fish.
Disinfectant
Chlorine
Utility water here is treated with chlorine. It slowly gases off from standing water, and any water conditioner removes it.
Safety for fish and shrimp
Nitrate (NO₃)
Not detected (Low)
Not detected in testing, so water changes lower your tank's nitrate well.
From California Water Board lab results, measured before treatment (2025–2026).
Copper at home taps
0.16 ppm (Worth knowing)
Shrimp and snails are sensitive to copper. Water that sits in household pipes picks up the most; it drops once the tap has run for a minute.
From California Water Board lab results (2025).
Water chemistry
General hardness
Area estimate42–267 ppm
Typical 125 ppm
Moderately soft to medium. Suits most community fish and plants.
Area estimate from nearby wells: USGS well samples in your county (2002–2022).
Carbonate hardness (alkalinity)
Area estimate83–293 ppm
Typical 153 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
Area estimate from nearby wells: USGS well samples in your county (2002–2022).
pH
6.7
Most community fish do well here. Stable water matters more than the exact number.
From EPA monitoring data, measured before treatment (2012–2018).
Total dissolved solids
Area estimate127–430 ppm
Typical 225 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 (2002–2022).
Who supplies Graton, CA
Blue Spruce Mobile Home Park
Serves 10% of residents · Groundwater (wells) · Chlorine
We couldn't fully map which utility serves Graton. These numbers come from the utility we matched, which serves about 10% of residents.
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.