Ceres, CA tap water
Supplied by City of Ceres. Here's what its 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
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 (2026).
Nitrate (NO₃)
27–31 ppm (High)
Typical 28 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
0.09 ppm (Low)
Low. Water that sits in household pipes overnight can carry more than this.
From California Water Board lab results (2023).
Water chemistry
General hardness
47–55 ppm
Typical 48 ppm
Soft. Good for tetras, rasboras and most shrimp. Livebearers, snails and African cichlids prefer harder water.
From California Water Board lab results (2026).
Carbonate hardness (alkalinity)
Supplier's figure51–52 ppm
Typical 52 ppm
Moderate buffering. pH should stay fairly steady.
From the utility that supplies yours: Stanislaus Regional Water Authority, which supplies City of Ceres (2024).
pH
7.2–7.6
Typical 7.5
Most community fish do well here. Stable water matters more than the exact number.
From California Water Board lab results (2026).
Total dissolved solids
350–572 ppm
Typical 460 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 Ceres, CA
City of Ceres
Serves 80% of residents · Buys water from Stanislaus Regional Water Authority · 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.