Santa Paula, CA tap water
Supplied mostly by City of Santa Paula, 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
Nitrite (NO₂)
Not detected (Low)
Not detected in testing, so any nitrite in your tank comes from the tank itself.
From EPA monitoring data; California Water Board lab results (2015–2026).
Nitrate (NO₃)
6.9–12 ppm (Low)
Typical 7.2 ppm
Water changes can't take your tank's nitrate below this level.
From EPA monitoring data; California Water Board lab results (2015–2026).
Copper at home taps
Up to 0.06 ppm (Low)
Typical 0.06 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
386–558 ppm
Typical 540 ppm
Hard. Ideal for livebearers and African cichlids. Soft-water species may struggle to breed.
From California Water Board lab results, measured before treatment; California Water Board lab results (2023–2026).
Carbonate hardness (alkalinity)
200–285 ppm
Typical 250 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From California Water Board lab results, measured before treatment; California Water Board lab results (2023–2026).
pH
7.4–7.7
Typical 7.5
Most community fish do well here. Stable water matters more than the exact number.
From EPA monitoring data; California Water Board lab results (2015–2026).
Total dissolved solids
740–1040 ppm
Typical 1015 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, measured before treatment; California Water Board lab results (2023–2026).
Who supplies Santa Paula, CA
City of Santa Paula
Serves 99% of residents · Groundwater (wells) · Chlorine
United Wtr Cons Dist
Serves 48% of residents · Groundwater fed by surface 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.
Tap water lookup covers US cities only for now. Want to know why it matters? Read our story on tap water.
Compiled by Shoal & Stem from public records. Free to cite with a link.