Highland Park, NJ tap water
Supplied by Highland Park W Dept. Here's what its water means for your fish.
Disinfectant
Chloramine
Your water is treated with chloramine. Unlike chlorine, it doesn't gas off when water sits out, and many pitcher and fridge filters aren't rated to remove it. Conditioners that list chloramine on the label break it apart, which frees a little ammonia. Some utilities switch to plain chlorine for a few weeks a year.
Safety for fish and shrimp
Nitrate (NO₃)
Supplier's figure5–16 ppm (Low)
Typical 6.1 ppm
Water changes can't take your tank's nitrate below this level.
From the utility that supplies yours: Middlesex Water Company, which supplies Highland Park W Dept (2012–2019).
Water chemistry
General hardness
Supplier's figure32–300 ppm
Typical 157 ppm
Moderately hard. Great for livebearers, and most community fish adapt.
From the utility that supplies yours: Middlesex Water Company, which supplies Highland Park W Dept (2024).
Carbonate hardness (alkalinity)
Supplier's figure28–196 ppm
Typical 90 ppm
Moderate buffering. pH should stay fairly steady.
From the utility that supplies yours: Middlesex Water Company, which supplies Highland Park W Dept (2024).
pH
Supplier's figure7–8
Typical 7.5
Most community fish do well here. Stable water matters more than the exact number.
From the utility that supplies yours: Middlesex Water Company, which supplies Highland Park W Dept (2024).
- Highland Park W Dept adds phosphate to protect pipes. It can feed algae in tanks without much plant growth.
- Highland Park W Dept softens its water at the plant, so it may be softer than the local groundwater.
Who supplies Highland Park, NJ
Highland Park W Dept
Serves all residents · Buys water from Middlesex Water Company · Chloramine
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.