Crooks, SD tap water
Supplied mostly by Crooks, 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
Nitrite (NO₂)
Not detected (Low)
Not detected in testing, so any nitrite in your tank comes from the tank itself.
From EPA monitoring data (2019).
Nitrate (NO₃)
Supplier's figureUp to 5.3 ppm (Low)
Typical 2.7 ppm
Low, so water changes lower your tank's nitrate well.
From the utility that supplies yours: Minnehaha Community Water Corp, which supplies Crooks; EPA monitoring data (2017–2019).
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)
Not published yet
We haven't found this number yet. A drop test kit gives you your exact reading.
pH
Not published yet
We haven't found this number yet. A drop test kit gives you your exact reading.
- Crooks and Minnehaha Community Water Corp add phosphate to protect pipes. It can feed algae in tanks without much plant growth.
- Crooks and Minnehaha Community Water Corp soften their water at the plant, so it may be softer than the local groundwater.
Who supplies Crooks, SD
Crooks
Serves 80% of residents · Buys water from Minnehaha Community Water Corp · Chloramine
Minnehaha Community Water Corp
Serves 27% of residents · Groundwater (wells) · 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.