Las Lomas, CA tap water
Supplied by Cwsc Las Lomas. 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)
0.9 ppm (Low)
Low, so water changes lower your tank's nitrate well.
From California Water Board lab results, measured before treatment (2023–2026).
Copper at home taps
0.06 ppm (Low)
Low. Water that sits in household pipes overnight can carry more than this.
From California Water Board lab results (2024).
Water chemistry
General hardness
Estimate256 ppm
Hard. Ideal for livebearers and African cichlids. Soft-water species may struggle to breed.
Estimated from Cwsc Las Lomas' calcium and magnesium readings (2024–2026).
Carbonate hardness (alkalinity)
240 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From California Water Board lab results, measured before treatment (2023–2025).
pH
7.7
Most community fish do well here. Stable water matters more than the exact number.
From California Water Board lab results (2025).
Total dissolved solids
400 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 (2023–2025).
Who supplies Las Lomas, CA
Cwsc Las Lomas
Serves 91% 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.