Mono Vista, CA tap water
Part of Mono Vista is supplied by Sonora Meadows Mutual Wtr Co, plus 2 other utilities. Here's what its water means for your fish.
Disinfectant
Chlorine
Utility water here 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 (2023–2025).
Nitrate (NO₃)
Supplier's figureNot detected (Low)
Not detected in testing, so water changes lower your tank's nitrate well.
From the utility that supplies it: Tud - Upper Basin Water System, which supplies Sonora Meadows Mutual Wtr Co; California Water Board lab results; California Water Board lab results, measured before treatment (2023–2025).
Copper at home taps
Up to 0.14 ppm (Low)
Typically not detected
Not detected in testing. Water that sits in household pipes overnight can still pick some up.
From California Water Board lab results (2023–2026).
Water chemistry
General hardness
Supplier's figure8–68 ppm
Typical 9 ppm
Soft. Good for tetras, rasboras and most shrimp. Livebearers, snails and African cichlids prefer harder water.
From the utility that supplies it: Tud - Upper Basin Water System, which supplies Sonora Meadows Mutual Wtr Co; California Water Board lab results; California Water Board lab results, measured before treatment (2023–2025).
Carbonate hardness (alkalinity)
Supplier's figure10–94 ppm
Typical 13 ppm
Little buffering. pH can drop quickly between water changes, especially with CO₂ or an older tank.
From the utility that supplies it: Tud - Upper Basin Water System, which supplies Sonora Meadows Mutual Wtr Co; California Water Board lab results; California Water Board lab results, measured before treatment (2023–2025).
pH
Supplier's figure6.2–7.2
Typical 6.4
Acidic. Stable water matters more than the exact number.
From the utility that supplies it: Tud - Upper Basin Water System, which supplies Sonora Meadows Mutual Wtr Co; California Water Board lab results; California Water Board lab results, measured before treatment (2023–2025).
Total dissolved solids
Supplier's figure16–100 ppm
Typical 20 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 it: Tud - Upper Basin Water System, which supplies Sonora Meadows Mutual Wtr Co; California Water Board lab results; California Water Board lab results, measured before treatment (2023–2025).
- Sonora Meadows Mutual Wtr Co and Tud - Upper Basin Water System add phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Mono Vista, CA
Sonora Meadows Mutual Wtr Co
Serves 35% of residents · Buys water from Tud - Upper Basin Water System · Chlorine
Tud - Upper Basin Water System
Serves 8% of residents · Lake or river water · Chlorine
Slide Inn Snowbowl Water Co
Serves 5% of residents · Groundwater (wells) · Disinfectant not listed
We couldn't fully map which utility serves Mono Vista. These numbers come from the utilities we matched, which serve about 48% of residents.
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.