Mount Vernon, NY tap water
Supplied by Mount Vernon Water Department. Here's what its 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
Nitrate (NO₃)
Supplier's figure0.3–1.6 ppm (Low)
Typical 0.6 ppm
Low, so water changes lower your tank's nitrate well.
From the utility that supplies yours: New York City System and Westchester County WD #1, which supplies Mount Vernon Water Department (2019–2025).
Water chemistry
General hardness
Supplier's figure17–463 ppm
Typical 32 ppm
Soft. Good for tetras, rasboras and most shrimp. Livebearers, snails and African cichlids prefer harder water.
From the utility that supplies yours: New York City System, which supplies Mount Vernon Water Department (2025).
Carbonate hardness (alkalinity)
Supplier's figure16–72 ppm
Typical 25 ppm
Little buffering. pH can drop quickly between water changes, especially with CO₂ or an older tank.
From the utility that supplies yours: New York City System, which supplies Mount Vernon Water Department (2025).
pH
Supplier's figure6.9–8.1
Typical 7.3
Most community fish do well here. Stable water matters more than the exact number.
From the utility that supplies yours: New York City System, which supplies Mount Vernon Water Department (2025).
Total dissolved solids
Supplier's figure45–240 ppm
Typical 73 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 yours: New York City System, which supplies Mount Vernon Water Department (2025).
- Mount Vernon Water Department adds phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Mount Vernon, NY
Mount Vernon Water Department
Serves all residents · Buys water from New York City System · 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.