Running Springs, CA tap water
Supplied mostly by Clawa, 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
Nitrite (NO₂)
Not detected (Low)
Not detected in testing, so any nitrite in your tank comes from the tank itself.
From California Water Board lab results (2023–2026).
Nitrate (NO₃)
Not detected (Low)
Not detected in testing, so water changes lower your tank's nitrate well.
From California Water Board lab results; California Water Board lab results, measured before treatment (2023–2026).
Copper at home taps
Up to 0.1 ppm (Low)
Typically not detected
Not detected in testing. Water that sits in household pipes overnight can still pick some up.
From California Water Board lab results (2023–2025).
Water chemistry
General hardness
74–115 ppm
Typical 88 ppm
Moderately soft to medium. Suits most community fish and plants.
From California Water Board lab results; California Water Board lab results, measured before treatment (2023–2026).
Carbonate hardness (alkalinity)
78–145 ppm
Typical 78 ppm
Moderate buffering. pH should stay fairly steady.
From California Water Board lab results; California Water Board lab results, measured before treatment (2023–2026).
pH
7.5–8.3
Typical 8.2
Alkaline. Many utilities raise pH to protect pipes. Stability matters more than the exact number.
From California Water Board lab results; California Water Board lab results, measured before treatment (2023–2026).
Total dissolved solids
140–250 ppm
Typical 250 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; California Water Board lab results, measured before treatment (2023–2026).
Who supplies Running Springs, CA
Clawa
Serves 55% of residents · Lake or river water · Chlorine
Running Springs Water District
Serves 44% of residents · Buys water from Arrowbear Park CWD · Chlorine
Arrowbear Park CWD
Serves 8% 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.
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.