Highgrove, CA tap water
Supplied mostly by Riverside Highland Water Company, 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
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)
6.6–29 ppm (Worth knowing)
Typical 10 ppm
Water changes can't take your tank's nitrate below this level.
From California Water Board lab results, measured before treatment; Riverside Public Utilities (RPU)'s 2025 water quality report (2023–2026).
Copper at home taps
0.15–0.8 ppm (Worth knowing)
Typical 0.15 ppm
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; Riverside Public Utilities (RPU)'s 2025 water quality report.
Chlorine or chloramine at the tap
0.1–0.8 ppm
Typical 0.6 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: Riverside Public Utilities (RPU)'s 2025 water quality report.
Water chemistry
General hardness
160–290 ppm
Typical 190 ppm
Moderately hard. Great for livebearers, and most community fish adapt.
From California Water Board lab results, measured before treatment; Riverside Public Utilities (RPU)'s 2025 water quality report (2024–2025).
Carbonate hardness (alkalinity)
140–270 ppm
Typical 160 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From California Water Board lab results, measured before treatment; Riverside Public Utilities (RPU)'s 2025 water quality report (2024–2025).
pH
7.4–8.1
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; Riverside Public Utilities (RPU)'s 2025 water quality report (2024–2025).
Total dissolved solids
170–520 ppm
Typical 260 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; Riverside Public Utilities (RPU)'s 2025 water quality report (2024–2025).
Who supplies Highgrove, CA
Riverside Highland Water Company
Serves 51% of residents · Groundwater (wells) · Chlorine
- 2025 water quality report
Riverside Public Utilities (RPU)
Serves 39% of residents · Groundwater fed by surface 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.