Bloomington, CA tap water
Supplied mostly by West Valley Water District, plus 2 other utilities. 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 (2023–2026).
Nitrate (NO₃)
Up to 30 ppm (Worth knowing)
Typical 22 ppm
High for tap water. Water changes can't take your tank's nitrate below this level.
From California Water Board lab results; California Water Board lab results, measured before treatment (2023–2026).
Copper at home taps (first draw)
0.06–0.12 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 West Valley Water District's 2024 water quality report; California Water Board lab results (2023–2024).
Chlorine or chloramine at the tap
0.3–2.5 ppm
Typical 1.4 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: West Valley Water District's 2024 water quality report.
Water chemistry
General hardness
130–240 ppm
Typical 162 ppm
Moderately hard. Great for livebearers, and most community fish adapt.
From West Valley Water District's 2024 water quality report; California Water Board lab results, measured before treatment; California Water Board lab results (2023–2026).
Carbonate hardness (alkalinity)
120–200 ppm
Typical 151 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From West Valley Water District's 2024 water quality report; California Water Board lab results, measured before treatment; California Water Board lab results (2023–2026).
pH
6.9–8.2
Typical 7.6
Most community fish do well here. Stable water matters more than the exact number.
From West Valley Water District's 2024 water quality report; California Water Board lab results, measured before treatment; California Water Board lab results (2023–2026).
Total dissolved solids
190–330 ppm
Typical 220 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 West Valley Water District's 2024 water quality report; California Water Board lab results, measured before treatment; California Water Board lab results (2023–2026).
Who supplies Bloomington, CA
- 2024 water quality report
West Valley Water District
Serves 71% of residents · Lake or river water · Chlorine
Marygold Mwc
Serves 13% of residents · Groundwater (wells) · Chlorine
San Gabriel Valley Wc - Fontana
Serves 10% of 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.