Lake Don Pedro, CA tap water
Supplied by Lake Don Pedro CSD. 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 EPA monitoring data (2016).
Nitrate (NO₃)
Not detected (Low)
Not detected in testing, so water changes lower your tank's nitrate well.
From EPA monitoring data (2016).
Copper at home taps
0.03 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
14–325 ppm
Typical 138 ppm
Moderately soft to medium. Suits most community fish and plants.
From California Water Board lab results, measured before treatment (2023–2025).
Carbonate hardness (alkalinity)
25 ppm
Little buffering. pH can drop quickly between water changes, especially with CO₂ or an older tank.
From California Water Board lab results (2023–2026).
pH
7.4
Most community fish do well here. Stable water matters more than the exact number.
From EPA monitoring data (2012–2016).
Total dissolved solids
17–440 ppm
Typical 315 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 (2023–2025).
Who supplies Lake Don Pedro, CA
Lake Don Pedro CSD
Serves all 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.
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.