Groveville, NJ tap water
Supplied mostly by Trenton Water Works, 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)
Up to 22 ppm (Low)
Typical 3.1 ppm
Low, so water changes lower your tank's nitrate well.
From Trenton Water Works' 2024 water quality report; EPA monitoring data (2012–2024).
Copper at home taps (first draw)
0.02–0.45 ppm (Worth knowing)
The 90th percentile of first-draw samples from homes: water that sat in household pipes for at least six hours.
Shrimp and snails are sensitive to copper. Water that sits in household pipes picks up the most; it drops once the tap has run for a minute.
Published by your utility: Trenton Water Works' 2024 water quality report.
Chlorine or chloramine at the tap
0.1–2.2 ppm
Typical 1.5 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: Trenton Water Works' 2024 water quality report.
Water chemistry
General hardness
80 ppm
Moderately soft to medium. Suits most community fish and plants.
From Trenton Water Works' 2024 water quality report; Trenton Water Works, which supplies Aqua NJ - Hamilton Square.
Carbonate hardness (alkalinity)
0–81 ppm
Typical 40 ppm
Moderate buffering. pH should stay fairly steady.
From EPA monitoring data (2012–2019).
pH
7.4–8.1
Typical 8.1
Alkaline. Many utilities raise pH to protect pipes. Stability matters more than the exact number.
From EPA monitoring data (2012–2019).
- Trenton Water Works and Aqua NJ - Hamilton Square add phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Groveville, NJ
- 2024 water quality report
Trenton Water Works
Serves 64% of residents · Lake or river water · Chlorine
Aqua NJ - Hamilton Square
Serves 36% of residents · Buys water from Trenton Water Works · 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.