Soquel, CA tap water
Supplied mostly by Soquel Creek Water District, plus 1 other utility. Here's what the water means for your fish.
Disinfectant
Chlorine
Your water is treated with chlorine. It slowly gases off from standing water, and any water conditioner removes it.
Safety for fish and shrimp
Ammonia
Not detected (Low)
Not detected in the water as delivered.
From California Water Board lab results (2023–2026).
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 (2016–2026).
Nitrate (NO₃)
Up to 8.6 ppm (Low)
Typical 7.1 ppm
Water changes can't take your tank's nitrate below this level.
From EPA monitoring data; California Water Board lab results (2014–2026).
Copper at home taps
0.11–0.17 ppm (Worth knowing)
Typical 0.17 ppm
Shrimp and snails are sensitive to copper. Water that sits in household pipes picks up the most; it drops once the tap has run for a minute.
From California Water Board lab results (2024–2025).
Water chemistry
General hardness
Supplier's figure160–280 ppm
Typical 260 ppm
Hard. Ideal for livebearers and African cichlids. Soft-water species may struggle to breed.
From the utility that supplies yours: Santa Cruz Water Department, which supplies Soquel Creek Water District; California Water Board lab results (2023–2025).
Carbonate hardness (alkalinity)
Supplier's figure116–190 ppm
Typical 154 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From the utility that supplies yours: Santa Cruz Water Department, which supplies Soquel Creek Water District; California Water Board lab results (2023–2025).
pH
7.3–8.1
Typical 7.8
Most community fish do well here. Stable water matters more than the exact number.
From EPA monitoring data; California Water Board lab results (2015–2025).
Total dissolved solids
Supplier's figure260–500 ppm
Typical 440 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: Santa Cruz Water Department, which supplies Soquel Creek Water District; California Water Board lab results (2023–2026).
- Soquel Creek Water District and Santa Cruz Water Department add phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Soquel, CA
Soquel Creek Water District
Serves 84% of residents · Buys water from Santa Cruz Water Department · Chlorine
Santa Cruz Water Department
Serves 9% of residents · Lake or river water · 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.