Knollwood, IL tap water
Supplied mostly by Lake Bluff, plus 1 other utility. 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)
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 1.8 ppm (Low)
Typical 1.8 ppm
Low, so water changes lower your tank's nitrate well.
From the utility that supplies yours: Central Lake County Jawa, which supplies Lake Bluff; 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)
Supplier's figure111–168 ppm
Typical 111 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From the utility that supplies yours: Central Lake County Jawa, which supplies Lake Bluff; EPA monitoring data (2017–2019).
pH
Not published yet
We haven't found this number yet. A drop test kit gives you your exact reading.
- Lake Bluff adds phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Knollwood, IL
Lake Bluff
Serves 95% of residents · Buys water from Central Lake County Jawa · Chlorine
Lake Bluff Estates MHP
Serves 7% of residents · Groundwater (wells) · 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.
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Compiled by Shoal & Stem from public records. Free to cite with a link.