La Verne, CA tap water
Supplied mostly by La Verne, City WD, plus 2 other utilities. Here's what the water means for your fish.
Disinfectant
Chloramine
Your water is treated with chloramine. Unlike chlorine, it doesn't gas off when water sits out, and many pitcher and fridge filters aren't rated to remove it. Conditioners that list chloramine on the label break it apart, which frees a little ammonia. Some utilities switch to plain chlorine for a few weeks a year.
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)
Up to 24 ppm (Worth knowing)
Typical 21 ppm
High for tap water. Water changes can't take your tank's nitrate below this level.
From California Water Board lab results (2023–2026).
Copper at home taps
Up to 0.07 ppm (Low)
Typical 0.07 ppm
Low. Water that sits in household pipes overnight can carry more than this.
From California Water Board lab results (2023–2026).
Water chemistry
General hardness
Supplier's figure82–291 ppm
Typical 99 ppm
Moderately soft to medium. Suits most community fish and plants.
From the utility that supplies yours: Three Valleys MWD, which supplies La Verne, City WD; California Water Board lab results (2023–2026).
Carbonate hardness (alkalinity)
Supplier's figure68–126 ppm
Typical 72 ppm
Moderate buffering. pH should stay fairly steady.
From the utility that supplies yours: Three Valleys MWD, which supplies La Verne, City WD; California Water Board lab results (2023–2026).
pH
8.1–8.7
Typical 8.2
Alkaline. Many utilities raise pH to protect pipes. Stability matters more than the exact number.
From California Water Board lab results (2023–2026).
Total dissolved solids
Supplier's figure214–666 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 the utility that supplies yours: Three Valleys MWD, which supplies La Verne, City WD; California Water Board lab results (2023–2026).
Who supplies La Verne, CA
La Verne, City WD
Serves 97% of residents · Buys water from Three Valleys MWD · Chloramine
Three Valleys MWD
Serves 35% of residents · Lake or river water · Chloramine
Metropolitan Water Dist. of So. Cal.
Serves 30% of residents · Lake or river water · Chloramine
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.