Palos Park, IL tap water
Supplied mostly by Palos Heights, plus 3 other utilities. 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
Nitrate (NO₃)
Supplier's figure1.4–1.6 ppm (Low)
Typical 1.6 ppm
Low, so water changes lower your tank's nitrate well.
From the utility that supplies yours: Chicago, which supplies Palos Heights; Chicago, which supplies Palos Park; Chicago, which supplies South Palos Twsp Sanitary Dist; Chicago, which supplies Orland Park (2025).
Water chemistry
General hardness
Supplier's figure130–151 ppm
Typical 140 ppm
Moderately soft to medium. Suits most community fish and plants.
From the utility that supplies yours: Chicago, which supplies Palos Heights; Chicago, which supplies Palos Park; Chicago, which supplies South Palos Twsp Sanitary Dist; Chicago, which supplies Orland Park.
Carbonate hardness (alkalinity)
Supplier's figure116–126 ppm
Typical 121 ppm
Strong buffering. pH stays steady and hard to lower without RO water.
From the utility that supplies yours: Chicago, which supplies Palos Heights; Chicago, which supplies Palos Park; Chicago, which supplies South Palos Twsp Sanitary Dist; Chicago, which supplies Orland Park (2017–2019).
pH
Supplier's figure7.9–9.4
Typical 8.8
Alkaline. Many utilities raise pH to protect pipes. Stability matters more than the exact number.
From the utility that supplies yours: Chicago, which supplies Palos Heights; Oak Lawn, which supplies Palos Park; Chicago, which supplies South Palos Twsp Sanitary Dist; Oak Lawn, which supplies Orland Park (2017–2025).
- Palos Heights, Palos Park, South Palos Twsp Sanitary Dist and Orland Park add phosphate to protect pipes. It can feed algae in tanks without much plant growth.
Who supplies Palos Park, IL
Palos Heights
Serves 48% of residents · Buys water from Alsip · Chlorine
Palos Park
Serves 20% of residents · Buys water from Oak Lawn · Chlorine
South Palos Twsp Sanitary Dist
Serves 17% of residents · Buys water from Palos Heights · Chlorine
Orland Park
Serves 6% of residents · Buys water from Oak Lawn · 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.