Morongo Valley, CA tap water
Supplied mostly by Csa 70-F Morongo, plus 2 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 6.6 ppm (Low)
Typical 5.9 ppm
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
0.06–0.1 ppm (Low)
Typical 0.07 ppm
Low. Water that sits in household pipes overnight can carry more than this.
From California Water Board lab results (2024–2025).
Water chemistry
General hardness
210–325 ppm
Typical 318 ppm
Hard. Ideal for livebearers and African cichlids. Soft-water species may struggle to breed.
From California Water Board lab results, measured before treatment (2023–2026).
Carbonate hardness (alkalinity)
215–350 ppm
Typical 348 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
7.6–8
Typical 7.7
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
440–530 ppm
Typical 528 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 Morongo Valley, CA
Csa 70-F Morongo
Serves 51% of residents · Groundwater (wells) · Chlorine
Golden State Water Co - Morongo del Sur
Serves 23% of residents · Groundwater (wells) · Chlorine
Golden State Water Morongo Delnorte
Serves 5% 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.