Lake Isabella, CA tap water
Supplied mostly by Lake Isabella Community Services Dist, 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)
Supplier's figure1.6–14 ppm (Low)
Typical 3.9 ppm
Low, so water changes lower your tank's nitrate well.
From the utility that supplies yours: Erskine Creek Wc, which supplies Lake Isabella Community Services Dist, measured before treatment; California Water Board lab results, measured before treatment; California Water Board lab results (2023–2026).
Copper at home taps
0.02–0.08 ppm (Low)
Typical 0.05 ppm
Low. Water that sits in household pipes overnight can carry more than this.
From California Water Board lab results (2023–2024).
Water chemistry
General hardness
Supplier's figure11–190 ppm
Typical 160 ppm
Moderately hard. Great for livebearers, and most community fish adapt.
From the utility that supplies yours: Erskine Creek Wc, which supplies Lake Isabella Community Services Dist, measured before treatment; California Water Board lab results, measured before treatment; California Water Board lab results (2023–2025).
Carbonate hardness (alkalinity)
Supplier's figure38–190 ppm
Typical 180 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From the utility that supplies yours: Erskine Creek Wc, which supplies Lake Isabella Community Services Dist, measured before treatment; California Water Board lab results, measured before treatment; California Water Board lab results (2023–2026).
pH
Supplier's figure7.2–8.2
Typical 7.8
Most community fish do well here. Stable water matters more than the exact number.
From the utility that supplies yours: Erskine Creek Wc, which supplies Lake Isabella Community Services Dist, measured before treatment; California Water Board lab results, measured before treatment; California Water Board lab results (2023–2026).
Total dissolved solids
Supplier's figure90–310 ppm
Typical 290 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 the utility that supplies yours: Erskine Creek Wc, which supplies Lake Isabella Community Services Dist, measured before treatment; California Water Board lab results, measured before treatment; California Water Board lab results (2023–2026).
Who supplies Lake Isabella, CA
Lake Isabella Community Services Dist
Serves 55% of residents · Buys water from Erskine Creek Wc · Chlorine
Erskine Creek Wc
Serves 21% of residents · Groundwater (wells) · Chlorine
Cws - Lakeland
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.