Lancaster, CA tap water
Supplied mostly by Antelope Valley East Kern Water Agency, 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 California Water Board lab results (2023–2025).
Nitrate (NO₃)
Up to 1.9 ppm (Low)
Typical 0.8 ppm
Low, so water changes lower your tank's nitrate well.
From California Water Board lab results; Antelope Valley East Kern Water Agency, which supplies Los Angeles Cwwd 40 Reg 4 & 34 Lancaster (2023–2025).
Copper at home taps
Up to 0.11 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
94–100 ppm
Typical 95 ppm
Moderately soft to medium. Suits most community fish and plants.
From California Water Board lab results; Antelope Valley East Kern Water Agency, which supplies Los Angeles Cwwd 40 Reg 4 & 34 Lancaster (2023–2025).
Carbonate hardness (alkalinity)
52–67 ppm
Typical 54 ppm
Moderate buffering. pH should stay fairly steady.
From California Water Board lab results; Antelope Valley East Kern Water Agency, which supplies Los Angeles Cwwd 40 Reg 4 & 34 Lancaster (2023–2025).
pH
7.5–7.7
Typical 7.5
Most community fish do well here. Stable water matters more than the exact number.
From California Water Board lab results; Antelope Valley East Kern Water Agency, which supplies Los Angeles Cwwd 40 Reg 4 & 34 Lancaster (2023–2025).
Total dissolved solids
230–250 ppm
Typical 240 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; Antelope Valley East Kern Water Agency, which supplies Los Angeles Cwwd 40 Reg 4 & 34 Lancaster (2023–2025).
- Antelope Valley East Kern Water Agency and Los Angeles Cwwd 40 Reg 4 & 34 Lancaster add phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Lancaster, CA
Antelope Valley East Kern Water Agency
Serves 57% of residents · Lake or river water · Chlorine
Los Angeles Cwwd 40 Reg 4 & 34 Lancaster
Serves 40% of residents · Buys water from Antelope Valley East Kern Water Agency · 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.