Glendora, CA tap water
Supplied mostly by Three Valleys MWD, 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 26 ppm (Low)
Typical 3.1 ppm
Low, so water changes lower your tank's nitrate well.
From California Water Board lab results; Covina Valley Water Company - Wholesale and Glendora-City, Water Dept., which supplies Suburban Water Systems-Glendora (2023–2026).
Copper at home taps
Up to 0.14 ppm (Low)
Typical 0.03 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
82–370 ppm
Typical 125 ppm
Moderately soft to medium. Suits most community fish and plants.
From California Water Board lab results; Metropolitan Water Dist. of So. Cal., which supplies Glendora-City, Water Dept.; Covina Valley Water Company - Wholesale and Glendora-City, Water Dept., which supplies Suburban Water Systems-Glendora (2023–2026).
Carbonate hardness (alkalinity)
68–280 ppm
Typical 106 ppm
Moderate buffering. pH should stay fairly steady.
From California Water Board lab results; Metropolitan Water Dist. of So. Cal., which supplies Glendora-City, Water Dept.; Covina Valley Water Company - Wholesale and Glendora-City, Water Dept., which supplies Suburban Water Systems-Glendora (2023–2026).
pH
7.4–8.7
Typical 8.2
Alkaline. Many utilities raise pH to protect pipes. Stability matters more than the exact number.
From California Water Board lab results; Metropolitan Water Dist. of So. Cal., which supplies Glendora-City, Water Dept.; Covina Valley Water Company - Wholesale and Glendora-City, Water Dept., which supplies Suburban Water Systems-Glendora (2023–2026).
Total dissolved solids
160–666 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 California Water Board lab results; Metropolitan Water Dist. of So. Cal., which supplies Glendora-City, Water Dept.; Covina Valley Water Company - Wholesale and Glendora-City, Water Dept., which supplies Suburban Water Systems-Glendora (2023–2026).
Who supplies Glendora, CA
Three Valleys MWD
Serves 44% of residents · Lake or river water · Chloramine
Glendora-City, Water Dept.
Serves 43% of residents · Buys water from Metropolitan Water Dist. of So. Cal. · Chloramine
Suburban Water Systems-Glendora
Serves 11% of residents · Buys water from Covina Valley Water Company - Wholesale · 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.