Big Bear City, CA tap water
Supplied mostly by Big Bear City CSD, plus 1 other utility. 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
Nitrite (NO₂)
Not detected (Low)
Not detected in testing, so any nitrite in your tank comes from the tank itself.
From EPA monitoring data; California Water Board lab results (2015–2023).
Nitrate (NO₃)
3–6.4 ppm (Low)
Typical 6.4 ppm
Water changes can't take your tank's nitrate below this level.
From California Water Board lab results (2023–2026).
Copper at home taps
0.08–0.11 ppm (Worth knowing)
Typical 0.11 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 (2023–2026).
Water chemistry
General hardness
110–330 ppm
Typical 225 ppm
Hard. Ideal for livebearers and African cichlids. Soft-water species may struggle to breed.
From California Water Board lab results, measured before treatment; California Water Board lab results (2023–2026).
Carbonate hardness (alkalinity)
170–300 ppm
Typical 215 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From California Water Board lab results, measured before treatment; California Water Board lab results (2023–2026).
pH
7.4–8
Typical 7.6
Most community fish do well here. Stable water matters more than the exact number.
From EPA monitoring data; California Water Board lab results (2015–2023).
Total dissolved solids
200–375 ppm
Typical 255 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; California Water Board lab results (2023–2026).
Who supplies Big Bear City, CA
Big Bear City CSD
Serves 91% of residents · Groundwater (wells) · Chlorine
Big Bear Lake Dwp - Big Bear System
Serves 15% 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.