Mira Monte, CA tap water
Supplied mostly by Casitas Municipal Water Dist, plus 3 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)
0.9–26 ppm (Low)
Typical 2.2 ppm
Low, so water changes lower your tank's nitrate well.
From California Water Board lab results; EPA monitoring data; Casitas Municipal Water Dist, which supplies Meiners Oaks CWD (2014–2026).
Copper at home taps
0.09–0.37 ppm (Worth knowing)
Typical 0.37 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 (2023–2026).
Water chemistry
General hardness
278–284 ppm
Typical 281 ppm
Hard. Ideal for livebearers and African cichlids. Soft-water species may struggle to breed.
From California Water Board lab results; Casitas Municipal Water Dist, which supplies Ventura River Water District; Casitas Municipal Water Dist, which supplies Meiners Oaks CWD; Casitas Municipal Water Dist, which supplies Tico Mutual Water Co (2023–2026).
Carbonate hardness (alkalinity)
150 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From California Water Board lab results; Casitas Municipal Water Dist, which supplies Ventura River Water District; Casitas Municipal Water Dist, which supplies Meiners Oaks CWD; Casitas Municipal Water Dist, which supplies Tico Mutual Water Co (2023).
pH
7.4–7.5
Typical 7.5
Most community fish do well here. Stable water matters more than the exact number.
From California Water Board lab results; Casitas Municipal Water Dist, which supplies Ventura River Water District; Casitas Municipal Water Dist, which supplies Meiners Oaks CWD; Casitas Municipal Water Dist, which supplies Tico Mutual Water Co (2023).
Total dissolved solids
415 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; Casitas Municipal Water Dist, which supplies Ventura River Water District; Casitas Municipal Water Dist, which supplies Meiners Oaks CWD; Casitas Municipal Water Dist, which supplies Tico Mutual Water Co (2023–2026).
Who supplies Mira Monte, CA
Casitas Municipal Water Dist
Serves 61% of residents · Lake or river water · Chlorine
Ventura River Water District
Serves 19% of residents · Buys water from Casitas Municipal Water Dist · Chlorine
Meiners Oaks CWD
Serves 8% of residents · Buys water from Casitas Municipal Water Dist · Chlorine
Tico Mutual Water Co
Serves 8% of residents · Buys water from Casitas Municipal Water Dist · 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.
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Compiled by Shoal & Stem from public records. Free to cite with a link.