Frederick, CO tap water
Supplied mostly by Town of Frederick, plus 2 other utilities. 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)
0.02 ppm (Low)
Essentially none, so any nitrite in your tank comes from the tank itself.
From EPA monitoring data (2012–2013).
Nitrate (NO₃)
Supplier's figureNot detected (Low)
Not detected in testing, so water changes lower your tank's nitrate well.
From the utility that supplies yours: Carter Lake Filter Plant, which supplies Town of Frederick; Carter Lake Filter Plant, which supplies Central Weld Cnty WD; EPA monitoring data (2012–2019).
Water chemistry
General hardness
Not published yet
We haven't found this number yet. A drop test kit gives you your exact reading.
Carbonate hardness (alkalinity)
41 ppm
Moderate buffering. pH should stay fairly steady.
From EPA monitoring data, measured before treatment (2012–2019).
pH
Not published yet
We haven't found this number yet. A drop test kit gives you your exact reading.
- Town of Frederick, Central Weld Cnty WD and Left Hand WD add phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Frederick, CO
Town of Frederick
Serves 64% of residents · Buys water from Carter Lake Filter Plant · Chlorine
Central Weld Cnty WD
Serves 12% of residents · Buys water from Carter Lake Filter Plant · Chlorine
Left Hand WD
Serves 11% 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.