Cudahy, CA tap water
Supplied mostly by Tract 180 Mutual Water Co., 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
Nitrate (NO₃)
Up to 5.8 ppm (Low)
Typical 5.8 ppm
Water changes can't take your tank's nitrate below this level.
From California Water Board lab results, measured before treatment (2023–2026).
Copper at home taps
Up to 0.09 ppm (Low)
Typical 0.09 ppm
Low. Water that sits in household pipes overnight can carry more than this.
From California Water Board lab results (2023–2025).
Water chemistry
General hardness
198–225 ppm
Typical 225 ppm
Hard. Ideal for livebearers and African cichlids. Soft-water species may struggle to breed.
From California Water Board lab results, measured before treatment (2023–2026).
Carbonate hardness (alkalinity)
170–210 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
6.4–7.8
Typical 7.8
Most community fish do well here. Stable water matters more than the exact number.
From California Water Board lab results, measured before treatment (2023–2026).
Total dissolved solids
370–400 ppm
Typical 400 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 (2023–2026).
Who supplies Cudahy, CA
Tract 180 Mutual Water Co.
Serves 65% of residents · Groundwater (wells) · Chlorine
Tract 349 Mutual Water Co.
Serves 39% 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.