Coarsegold, CA tap water
Supplied mostly by Madera Co SA1-Indian Lakes, plus 3 other utilities. Here's what the 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)
Up to 4.3 ppm (Low)
Typically not detected
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
0.03–0.05 ppm (Low)
Typical 0.05 ppm
Low. Water that sits in household pipes overnight can carry more than this.
From California Water Board lab results (2023–2025).
Water chemistry
General hardness
58–280 ppm
Typical 180 ppm
Moderately hard. Great for livebearers, and most community fish adapt.
From California Water Board lab results, measured before treatment (2023–2026).
Carbonate hardness (alkalinity)
72–190 ppm
Typical 150 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From California Water Board lab results, measured before treatment (2023–2026).
pH
6.5–7
Typical 7
Most community fish do well here. Stable water matters more than the exact number.
From California Water Board lab results, measured before treatment (2023–2026).
Total dissolved solids
185–580 ppm
Typical 330 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 (2023–2026).
Who supplies Coarsegold, CA
Madera Co SA1-Indian Lakes
Serves 35% of residents · Groundwater (wells) · Chlorine
Skp Park of the Sierras Inc
Serves 14% of residents · Groundwater (wells) · Disinfectant not listed
Md 63 Meadow Springs Ranch
Serves 10% of residents · Groundwater (wells) · Chlorine
Oak Creek Mobile Home Park
Serves 9% 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.
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Compiled by Shoal & Stem from public records. Free to cite with a link.