Vienna, VA tap water
Supplied by Town of Vienna. Here's what its water means for your fish.
Disinfectant
Chloramine
Your water is treated with chloramine. Unlike chlorine, it doesn't gas off when water sits out, and many pitcher and fridge filters aren't rated to remove it. Conditioners that list chloramine on the label break it apart, which frees a little ammonia. Some utilities switch to plain chlorine for a few weeks a year.
Safety for fish and shrimp
Nitrate (NO₃)
Supplier's figure1–9.3 ppm (Low)
Typical 5.1 ppm
Water changes can't take your tank's nitrate below this level.
From the utility that supplies yours: Fairfax County Water Authority, which supplies Town of Vienna (2024).
Water chemistry
General hardness
Supplier's figure84–170 ppm
Typical 127 ppm
Moderately soft to medium. Suits most community fish and plants.
From the utility that supplies yours: Fairfax County Water Authority, which supplies Town of Vienna.
Carbonate hardness (alkalinity)
Supplier's figure54–88 ppm
Typical 77 ppm
Moderate buffering. pH should stay fairly steady.
From the utility that supplies yours: Fairfax County Water Authority, which supplies Town of Vienna (2012–2019).
pH
Supplier's figure7.3–7.5
Typical 7.3
Most community fish do well here. Stable water matters more than the exact number.
From the utility that supplies yours: Fairfax County Water Authority, which supplies Town of Vienna (2012–2019).
- Town of Vienna adds phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Vienna, VA
Town of Vienna
Serves 99% of residents · Buys water from Fairfax County Water Authority · Chloramine
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.