Rock Rapids, IA tap water
Supplied mostly by Lyon-Sioux Rws-Rock Rapids, 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 (2012–2019).
Nitrate (NO₃)
Supplier's figureUp to 42 ppm (Worth knowing)
Typical 15 ppm
Water changes can't take your tank's nitrate below this level.
From the utility that supplies yours: Rock Rapids Municipal Water Works and Lyon-Sioux Rws-Doon and Lyon-Sioux Rws-Boyden and Lyon-Sioux Rws-Big Sioux, which supplies Lyon-Sioux Rws-Rock Rapids; 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)
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.
- Lyon-Sioux Rws-Rock Rapids and Rock Rapids Municipal Water Works add phosphate to protect pipes. It can feed algae in tanks without much plant growth.
- Lyon-Sioux Rws-Rock Rapids and Rock Rapids Municipal Water Works soften their water at the plant, so it may be softer than the local groundwater.
Who supplies Rock Rapids, IA
Lyon-Sioux Rws-Rock Rapids
Serves 49% of residents · Buys water from Rock Rapids Municipal Water Works · Chloramine
Rock Rapids Municipal Water Works
Serves 49% 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.
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Compiled by Shoal & Stem from public records. Free to cite with a link.