Sterling Ranch, CO tap water
Supplied mostly by Sterling Ranch Cab, plus 1 other utility. Here's what the 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 figureUp to 0.9 ppm (Low)
Typical 0.1 ppm
Low, so water changes lower your tank's nitrate well.
From the utility that supplies yours: Roxborough WSD and Town of Castle Rock, which supplies Sterling Ranch Cab; Roxborough WSD and Town of Castle Rock, which supplies Dominion WSD (2012–2019).
Water chemistry
General hardness
Supplier's figure67–239 ppm
Typical 121 ppm
Moderately soft to medium. Suits most community fish and plants.
From the utility that supplies yours: Town of Castle Rock, which supplies Sterling Ranch Cab; Town of Castle Rock, which supplies Dominion WSD (2024).
Carbonate hardness (alkalinity)
Supplier's figure59–116 ppm
Typical 78 ppm
Moderate buffering. pH should stay fairly steady.
From the utility that supplies yours: Roxborough WSD and Town of Castle Rock, which supplies Sterling Ranch Cab; Roxborough WSD and Town of Castle Rock, which supplies Dominion WSD (2018–2024).
pH
Supplier's figure6.9–8.7
Typical 7.9
Most community fish do well here. Stable water matters more than the exact number.
From the utility that supplies yours: Town of Castle Rock, which supplies Sterling Ranch Cab; Town of Castle Rock, which supplies Dominion WSD (2024).
Total dissolved solids
Supplier's figure156–486 ppm
Typical 248 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: Town of Castle Rock, which supplies Sterling Ranch Cab; Town of Castle Rock, which supplies Dominion WSD (2024).
- Sterling Ranch Cab and Dominion WSD add phosphate to protect pipes. It can feed algae in tanks without much plant growth.
- Sterling Ranch Cab and Dominion WSD soften their water at the plant, so it may be softer than the local groundwater.
Who supplies Sterling Ranch, CO
Sterling Ranch Cab
Serves 58% of residents · Buys water from Dominion WSD · Chloramine
Dominion WSD
Serves 42% of residents · Buys water from Roxborough WSD · 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.
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Compiled by Shoal & Stem from public records. Free to cite with a link.