Hazardville, CT tap water
Supplied mostly by Hazardville Water Company, 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)
0.1–26 ppm (Worth knowing)
Typical 15 ppm
Water changes can't take your tank's nitrate below this level.
From EPA monitoring data (2012–2019).
Water chemistry
General hardness
Area estimate24–349 ppm
Typical 121 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)
22–71 ppm
Typical 23 ppm
Little buffering. pH can drop quickly between water changes, especially with CO₂ or an older tank.
From EPA monitoring data (2016–2019).
pH
7.5–8.1
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 estimate64–371 ppm
Typical 193 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).
- Hazardville Water Company and Ctwc - Northern Reg-Western System add phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Hazardville, CT
Hazardville Water Company
Serves 98% of residents · Groundwater (wells) · Chlorine
Ctwc - Northern Reg-Western System
Serves 16% 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.