Pismo Beach, CA tap water
Supplied by Pismo Beach Water Department. Here's what its water means for your fish.
Disinfectant
Chloramine
Your water is treated with chloramine. Unlike chlorine, it doesn't gas off when water sits out, and many pitcher and fridge filters aren't rated to remove it. Conditioners that list chloramine on the label break it apart, which frees a little ammonia. Some utilities switch to plain chlorine for a few weeks a year.
Safety for fish and shrimp
Nitrate (NO₃)
Supplier's figureUp to 1.1 ppm (Low)
Typical 0.6 ppm
Low, so water changes lower your tank's nitrate well.
From the utility that supplies yours: Central Coast Water Authority and Lopez Project, which supplies Pismo Beach Water Department (2023–2026).
Copper at home taps
0.12 ppm (Worth knowing)
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 (2023–2025).
Water chemistry
General hardness
Supplier's figure87–331 ppm
Typical 209 ppm
Moderately hard. Great for livebearers, and most community fish adapt.
From the utility that supplies yours: Central Coast Water Authority and Lopez Project, which supplies Pismo Beach Water Department (2023–2026).
Carbonate hardness (alkalinity)
Supplier's figure66–237 ppm
Typical 152 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From the utility that supplies yours: Central Coast Water Authority and Lopez Project, which supplies Pismo Beach Water Department (2023–2026).
pH
Supplier's figure8.1
Alkaline. Many utilities raise pH to protect pipes. Stability matters more than the exact number.
From the utility that supplies yours: Central Coast Water Authority and Lopez Project, which supplies Pismo Beach Water Department (2023–2026).
Total dissolved solids
Supplier's figure260–450 ppm
Typical 355 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: Central Coast Water Authority and Lopez Project, which supplies Pismo Beach Water Department (2023–2026).
Who supplies Pismo Beach, CA
Pismo Beach Water Department
Serves all residents · Buys water from Central Coast Water Authority · 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.