Oxoboxo River, CT tap water
Supplied mostly by Montville Water Supply, 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 figure0.1–1.9 ppm (Low)
Typical 0.1 ppm
Low, so water changes lower your tank's nitrate well.
From the utility that supplies yours: Groton Utilities, which supplies Montville Water Supply; 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 Montville Water Supply, measured before treatment; Groton Utilities, which supplies Scwa, Hillcrest Division (Hlc), measured before treatment (2012–2019).
pH
7.8–8.3
Typical 8
Most community fish do well here. Stable water matters more than the exact number.
From EPA monitoring data (2017–2019).
- Montville Water Supply and Scwa, Hillcrest Division (Hlc) add phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Oxoboxo River, CT
Montville Water Supply
Serves 74% of residents · Buys water from Groton Utilities · Chlorine
Scwa, Hillcrest Division (Hlc)
Serves 18% of residents · Buys water from Montville Water Supply · 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.