Midway City, CA tap water
Part of Midway City is supplied by Eastside Water Association, plus 2 other utilities. Here's what its water means for your fish.
Disinfectant
Chlorine or chloramine
Utilities here use chlorine or chloramine, depending on which one serves your address. Chlorine slowly gases off from standing water; chloramine doesn't.
Safety for fish and shrimp
Nitrate (NO₃)
Up to 2.9 ppm (Low)
Typical 1.1 ppm
Low, so water changes lower your tank's nitrate well.
From California Water Board lab results, measured before treatment; Metropolitan Water Dist. of So. Cal., which supplies City of Westminster (2023–2026).
Copper at home taps
0.05–0.08 ppm (Low)
Typical 0.08 ppm
Low. Water that sits in household pipes overnight can carry more than this.
From California Water Board lab results (2023–2025).
Water chemistry
General hardness
82–291 ppm
Typical 183 ppm
Moderately hard. Great for livebearers, and most community fish adapt.
From California Water Board lab results, measured before treatment; Metropolitan Water Dist. of So. Cal., which supplies City of Westminster (2023–2026).
Carbonate hardness (alkalinity)
68–174 ppm
Typical 167 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From California Water Board lab results, measured before treatment; Metropolitan Water Dist. of So. Cal., which supplies City of Westminster (2023–2026).
pH
7.6–8.1
Typical 8
Most community fish do well here. Stable water matters more than the exact number.
From California Water Board lab results, measured before treatment; EPA monitoring data (2012–2026).
Total dissolved solids
214–666 ppm
Typical 293 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; Metropolitan Water Dist. of So. Cal., which supplies City of Westminster (2023–2026).
Who supplies Midway City, CA
Eastside Water Association
Serves 21% of residents · Groundwater (wells) · Chlorine
Midway City Mutual Wc
Serves 16% of residents · Groundwater (wells) · Chlorine
City of Westminster
Serves 10% of residents · Buys water from Metropolitan Water Dist. of So. Cal. · Chloramine
We couldn't fully map which utility serves Midway City. These numbers come from the utilities we matched, which serve about 47% 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.
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Compiled by Shoal & Stem from public records. Free to cite with a link.