La Mirada, CA tap water
Supplied mostly by Suburban Water Systems-la Mirada, plus 1 other utility. Here's what the water means for your fish.
Disinfectant
Chlorine or chloramine
Utilities here use chlorine or chloramine, depending on which one serves your address. Chlorine slowly gases off from standing water; chloramine doesn't.
Safety for fish and shrimp
Nitrate (NO₃)
Supplier's figureUp to 14 ppm (Low)
Typical 6.2 ppm
Water changes can't take your tank's nitrate below this level.
From the utility that supplies yours: Metropolitan Water Dist. of So. Cal. and Suburban Water Systems-Whittier, which supplies Suburban Water Systems-la Mirada; California Water Board lab results, measured before treatment (2023–2026).
Copper at home taps
0.08–0.1 ppm (Low)
Typical 0.1 ppm
Low. Water that sits in household pipes overnight can carry more than this.
From California Water Board lab results (2024–2025).
Water chemistry
General hardness
Supplier's figure82–291 ppm
Typical 243 ppm
Hard. Ideal for livebearers and African cichlids. Soft-water species may struggle to breed.
From the utility that supplies yours: Metropolitan Water Dist. of So. Cal. and Suburban Water Systems-Whittier, which supplies Suburban Water Systems-la Mirada; California Water Board lab results, measured before treatment (2023–2026).
Carbonate hardness (alkalinity)
160–210 ppm
Typical 210 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From California Water Board lab results; California Water Board lab results, measured before treatment (2023–2026).
pH
Supplier's figure7.6–8.7
Typical 8
Most community fish do well here. Stable water matters more than the exact number.
From the utility that supplies yours: Metropolitan Water Dist. of So. Cal. and Suburban Water Systems-Whittier, which supplies Suburban Water Systems-la Mirada; California Water Board lab results, measured before treatment (2023–2026).
Total dissolved solids
390–580 ppm
Typical 390 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 La Mirada, CA
Suburban Water Systems-la Mirada
Serves 88% of residents · Buys water from Metropolitan Water Dist. of So. Cal. · Chloramine
Suburban Water Systems-Whittier
Serves 9% 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.