Four Square Mile, CO tap water
Supplied by Cherry Creek Valley WSD. 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 figure0.3–0.8 ppm (Low)
Typical 0.4 ppm
Low, so water changes lower your tank's nitrate well.
From the utility that supplies yours: Denver Water Board, which supplies Cherry Creek Valley WSD (2025).
Water chemistry
General hardness
Supplier's figure55–124 ppm
Typical 105 ppm
Moderately soft to medium. Suits most community fish and plants.
From the utility that supplies yours: Denver Water Board, which supplies Cherry Creek Valley WSD (2025).
Carbonate hardness (alkalinity)
Supplier's figure41–82 ppm
Typical 65 ppm
Moderate buffering. pH should stay fairly steady.
From the utility that supplies yours: Denver Water Board, which supplies Cherry Creek Valley WSD (2025).
pH
Not published yet
We haven't found this number yet. A drop test kit gives you your exact reading.
Total dissolved solids
Supplier's figure98–273 ppm
Typical 220 ppm
A rough measure of everything dissolved in the water. RO water reads near 0, so TDS is a quick way to compare waters.
From the utility that supplies yours: Denver Water Board, which supplies Cherry Creek Valley WSD (2025).
- Cherry Creek Valley WSD adds phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Four Square Mile, CO
Cherry Creek Valley WSD
Serves 96% of residents · Buys water from Denver Water Board · 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.