Salinas, CA tap water
Supplied mostly by California Water Service (Cal Water), Salinas 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
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 (2025–2026).
Nitrate (NO₃)
1.8–54 ppm (Worth knowing)
Typical 14 ppm
Water changes can't take your tank's nitrate below this level.
From California Water Service (Cal Water), Salinas District's 2024 water quality report; California Water Board lab results, measured before treatment (2023–2026).
Copper at home taps (first draw)
0.31–0.47 ppm (Worth knowing)
The 90th percentile of first-draw samples from homes: water that sat in household pipes for at least six hours.
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 Service (Cal Water), Salinas District's 2024 water quality report; California Water Board lab results (2024–2025).
Chlorine or chloramine at the tap
1–1.7 ppm
Typical 1 ppm
At tap levels, chlorine and chloramine are toxic to fish, shrimp and the bacteria in a filter. Water conditioners are made for this range.
Published by your utility: California Water Service (Cal Water), Salinas District's 2024 water quality report.
Water chemistry
General hardness
31–254 ppm
Typical 254 ppm
Hard. Ideal for livebearers and African cichlids. Soft-water species may struggle to breed.
From California Water Service (Cal Water), Salinas District's 2024 water quality report; California Water Board lab results, measured before treatment (2023–2026).
Carbonate hardness (alkalinity)
131–295 ppm
Typical 190 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From California Water Board lab results, measured before treatment (2023–2026).
pH
6.5–9
Typical 7.3
Most community fish do well here. Stable water matters more than the exact number.
From California Water Service (Cal Water), Salinas District's 2024 water quality report; California Water Board lab results, measured before treatment (2023–2026).
Total dissolved solids
300–960 ppm
Typical 513 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 Service (Cal Water), Salinas District's 2024 water quality report; California Water Board lab results, measured before treatment (2023–2026).
Who supplies Salinas, CA
- 2024 water quality report
California Water Service (Cal Water), Salinas District
Serves 67% of residents · Groundwater (wells) · Chlorine
Alco Water Service
Serves 34% of residents · Groundwater (wells) · 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.
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.