Terryville, CT tap water
Supplied by Ctwc - Naugatuck Reg-Terryville System. 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
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)
5.6 ppm (Low)
Water changes can't take your tank's nitrate below this level.
From EPA monitoring data (2012–2019).
Water chemistry
General hardness
Area estimate40–188 ppm
Typical 86 ppm
Moderately soft to medium. Suits most community fish and plants.
Area estimate from nearby wells: USGS well samples in your county (2002–2017).
Carbonate hardness (alkalinity)
Area estimate20–110 ppm
Typical 60 ppm
Moderate buffering. pH should stay fairly steady.
Area estimate from nearby wells: USGS well samples in your county (2002–2017).
pH
7.7–7.9
Typical 7.9
Most community fish do well here. Stable water matters more than the exact number.
From EPA monitoring data (2017–2019).
Total dissolved solids
Area estimate81–303 ppm
Typical 151 ppm
A rough measure of everything dissolved in the water. RO water reads near 0, so TDS is a quick way to compare waters.
Area estimate from nearby wells: USGS well samples in your county (2002–2017).
- Ctwc - Naugatuck Reg-Terryville System adds phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Terryville, CT
Ctwc - Naugatuck Reg-Terryville System
Serves 75% of residents · Groundwater (wells) · 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.