Westhaven-Moonstone, CA tap water
About 43% of Westhaven-Moonstone 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
Nitrate (NO₃)
1.5–26 ppm (Worth knowing)
Typical 21 ppm
High for tap water. Water changes can't take your tank's nitrate below this level.
From California Water Board lab results, measured before treatment (2023–2026).
Copper at home taps
0.19–0.68 ppm (High)
Typical 0.68 ppm
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 (2024–2025).
Water chemistry
General hardness
17–120 ppm
Typical 73 ppm
Moderately soft to medium. Suits most community fish and plants.
From California Water Board lab results, measured before treatment (2023–2024).
Carbonate hardness (alkalinity)
10–110 ppm
Typical 60 ppm
Moderate buffering. pH should stay fairly steady.
From California Water Board lab results, measured before treatment (2023–2026).
pH
5.7–7.2
Typical 6.5
Acidic. Stable water matters more than the exact number.
From California Water Board lab results, measured before treatment (2023–2024).
Total dissolved solids
41–200 ppm
Typical 132 ppm
A rough measure of everything dissolved in the water. RO water reads near 0, so TDS is a quick way to compare waters.
From California Water Board lab results, measured before treatment (2023–2024).
Who supplies Westhaven-Moonstone, CA
Westhaven C.S.D.
Serves 37% of residents · Lake or river water · Chlorine
City of Trinidad
Serves 5% of residents · Lake or river water · 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.
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Compiled by Shoal & Stem from public records. Free to cite with a link.