Lancaster, PA tap water
Supplied by Lancaster City Water. 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)
23–29 ppm (High)
Typical 29 ppm
High for tap water. Water changes can't take your tank's nitrate below this level.
Published by your utility: Lancaster City Water's 2025 water quality report.
Chlorine or chloramine at the tap
0–2.7 ppm
Typical 0.5 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: Lancaster City Water's 2025 water quality report.
Water chemistry
General hardness
120–257 ppm
Typical 188 ppm
Moderately hard. Great for livebearers, and most community fish adapt.
Published by your utility: Lancaster City Water's website.
Carbonate hardness (alkalinity)
61–158 ppm
Typical 110 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
Published by your utility: Lancaster City Water's website.
pH
7.4
Most community fish do well here. Stable water matters more than the exact number.
Published by your utility: Lancaster City Water's website.
- Lancaster City Water adds phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Lancaster, PA
- 2025 water quality report
Lancaster City Water
Serves all 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.