El Dorado Hills, CA tap water
Supplied by El Dorado Id - Main. Here's what its water means for your fish.
Disinfectant
Not confirmed
We couldn't confirm how your water is disinfected. US utilities use chlorine or chloramine, and chloramine doesn't gas off when water sits out.
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 (2017).
Nitrate (NO₃)
Not detected (Low)
Not detected in testing, so water changes lower your tank's nitrate well.
From EPA monitoring data (2017).
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
11–17 ppm
Typical 15 ppm
Soft. Good for tetras, rasboras and most shrimp. Livebearers, snails and African cichlids prefer harder water.
From California Water Board lab results (2023–2024).
Carbonate hardness (alkalinity)
17–24 ppm
Typical 20 ppm
Little buffering. pH can drop quickly between water changes, especially with CO₂ or an older tank.
From California Water Board lab results (2023–2024).
pH
7.5–9.2
Typical 7.8
Most community fish do well here. Stable water matters more than the exact number.
From California Water Board lab results (2024–2025).
Total dissolved solids
43–50 ppm
Typical 45 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 (2023–2024).
Who supplies El Dorado Hills, CA
El Dorado Id - Main
Serves 97% of residents · Lake or river water · Disinfectant not listed
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.