Noank, CT tap water
Supplied mostly by Noank Fire District, plus 1 other utility. 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 EPA monitoring data (2012–2019).
Nitrate (NO₃)
Supplier's figure0.1 ppm (Low)
Low, so water changes lower your tank's nitrate well.
From the utility that supplies yours: Groton Utilities, which supplies Noank Fire District; EPA monitoring data (2012–2019).
Water chemistry
General hardness
Not published yet
We haven't found this number yet. A drop test kit gives you your exact reading.
Carbonate hardness (alkalinity)
Supplier's figure10 ppm
Little buffering. pH can drop quickly between water changes, especially with CO₂ or an older tank.
From the utility that supplies yours: Groton Utilities, which supplies Noank Fire District, measured before treatment; EPA monitoring data, measured before treatment (2012–2019).
pH
7.4–8.4
Typical 8.3
Alkaline. Many utilities raise pH to protect pipes. Stability matters more than the exact number.
From EPA monitoring data (2017–2019).
- Noank Fire District and Groton Utilities add phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Noank, CT
Noank Fire District
Serves 50% of residents · Buys water from Groton Utilities · Chlorine
Groton Utilities
Serves 39% of residents · Lake or river water · 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.
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.