West Falls Church, VA tap water
Supplied by Fairfax Water. 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 about 0.71 ppm of ammonia here. Some utilities switch to plain chlorine for a few weeks a year.
Safety for fish and shrimp
Ammonia (with conditioner)
Estimate0.12–1 ppm (Worth knowing)
Typical 0.71 ppm
This is what a conditioner frees when it breaks the chloramine apart. A cycled filter clears it within a day; a big water change in a new or very small tank adds more of it at once. Some conditioners also bind ammonia for a day or so.
Estimated from the chloramine level Fairfax Water reports (2024).
Nitrite (NO₂)
0.05 ppm (Low)
Essentially none, so any nitrite in your tank comes from the tank itself.
Published by your utility: Fairfax Water's 2024 water quality report.
Nitrate (NO₃)
1–9.3 ppm (Low)
Typical 5.1 ppm
Water changes can't take your tank's nitrate below this level.
Published by your utility: Fairfax Water's 2024 water quality report.
Copper at home taps (first draw)
0.01–0.2 ppm (Low)
The 90th percentile of first-draw samples from homes: water that sat in household pipes for at least six hours.
Low. Water that sits in household pipes overnight can carry more than this.
Published by your utility: Fairfax Water's 2024 water quality report.
Chlorine or chloramine at the tap
0.5–4.1 ppm
Typical 2.9 ppm
At tap levels, chlorine and chloramine are toxic to fish, shrimp and the bacteria in a filter. Water conditioners are made for this range.
Published by your utility: Fairfax Water's 2024 water quality report.
Water chemistry
General hardness
84–170 ppm
Typical 127 ppm
Moderately soft to medium. Suits most community fish and plants.
Published by your utility: Fairfax Water's website.
Carbonate hardness (alkalinity)
54–88 ppm
Typical 77 ppm
Moderate buffering. pH should stay fairly steady.
From EPA monitoring data (2012–2019).
pH
7.3–7.5
Typical 7.3
Most community fish do well here. Stable water matters more than the exact number.
From EPA monitoring data (2012–2019).
- Fairfax Water adds phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies West Falls Church, VA
- 2024 water quality report
Fairfax Water
Serves 94% of residents · Lake or river water · 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.
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.