Santa Susana, CA tap water
About 47% of Santa Susana is inside a utility's service area. Homes outside it likely use private wells, which no utility tests.
Disinfectant
Chloramine
Utility water here 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. Private wells aren't treated by a utility, so there's no chlorine or chloramine unless a treatment system adds 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)
Up to 3.5 ppm (Low)
Typically not detected
Not detected in testing, so water changes lower your tank's nitrate well.
From California Water Board lab results (2023–2026).
Copper at home taps
Not detected (Low)
Not detected in testing. Water that sits in household pipes overnight can still pick some up.
From California Water Board lab results (2023–2026).
Water chemistry
General hardness
161–192 ppm
Typical 161 ppm
Moderately hard. Great for livebearers, and most community fish adapt.
From California Water Board lab results (2023–2026).
Carbonate hardness (alkalinity)
120–130 ppm
Typical 120 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From California Water Board lab results (2023–2026).
pH
7.5–8.2
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
340–420 ppm
Typical 420 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 (2023–2026).
Who supplies Santa Susana, CA
Calleguas Municipal Water Dist
Serves 47% of residents · Lake or river water · Chloramine
Ventura Wwd No. 8 - Simi Valley
Serves 46% of residents · Buys water from Calleguas Municipal Water Dist · 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.