Hayfork, CA tap water
Supplied by Trinity Co. W.W. Dist #1. Here's what its water means for your fish.
Disinfectant
Chlorine
Your water 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 (2023–2026).
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 (2024–2026).
Water chemistry
General hardness
Estimate85 ppm
Moderately soft to medium. Suits most community fish and plants.
Estimated from Trinity Co. W.W. Dist #1's calcium and magnesium readings, measured before treatment (2025–2026).
Carbonate hardness (alkalinity)
89 ppm
Moderate buffering. pH should stay fairly steady.
From California Water Board lab results, measured before treatment (2026).
pH
8.1
Alkaline. Many utilities raise pH to protect pipes. Stability matters more than the exact number.
From California Water Board lab results, measured before treatment (2026).
Total dissolved solids
120 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 (2026).
Who supplies Hayfork, CA
Trinity Co. W.W. Dist #1
Serves 59% 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.
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.