Kewanee, IL water hardness
Reported by Kewanee · June 2022
- IL typical
- 139 mg/L
- EPA health violations since 2016
- 0
- Data
- Utility report
Tap water in Kewanee has about 54 mg/L of hardness, which is 3.2 grains per gallon. On the USGS scale that counts as soft. The number comes from Kewanee, dated June 2022. Reports for this system disagree, with values from 35 to 54 mg/L.
At 54 mg/L, Kewanee is 85 mg/L below the typical Illinois figure of 139. None of the 10 nearest cities we track has softer water. The range nearby runs from 110 mg/L in Moline to 361 in East Peoria.
What 54 mg/L means at home
Soap and shampoo lather with very little product. Kettles and showerheads stay mostly free of white crust.
Some people notice that soap feels slow to rinse off in soft water. That slippery feel is normal and harmless.
Hardness is not a health problem, and EPA sets no limit for it. It is a matter of scale and soap.
What to do about it
Nothing, as far as hardness goes. At 54 mg/L a softener would have almost nothing to remove.
Carbon filter
If the water tastes of chlorine, a pitcher or faucet carbon filter takes care of that. It does not change hardness.
EPA record for Kewanee's water system
No health-based violations since 2016
Serves about 12,509 people from groundwater.
- Health-based
- 0
- Monitoring or reporting
- 5
- Open now
- 2
Health-based means a contaminant above its legal limit or a missed treatment step. Monitoring and reporting violations are late or missing tests and notices. Source: EPA ECHO, 2026Q3 export, violations with periods starting 2016 or later. Full EPA record.
Questions
Is Kewanee water hard?
No. It measures about 54 mg/L (3.2 grains per gallon), which the USGS classes as soft.
What is the water hardness in Kewanee in grains per gallon?
About 3.2 gpg. One grain per gallon equals 17.1 mg/L, so 54 mg/L divided by 17.1 gives 3.2.
Has the Kewanee water system had EPA violations?
EPA records show no health-based violations for Kewanee since 2016. There were also 5 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- Galesburg331 mg/LVery hard
- Silvis212 mg/LVery hard
- East Moline192 mg/LVery hard
- Moline110 mg/LModerately hard
- Peoria272 mg/LVery hard
- Sterling172 mg/LHard
- Bartonville283 mg/LVery hard
- Monmouth175 mg/LHard
- East Peoria361 mg/LVery hard
- Washington230 mg/LVery hard
Hardness data: TapWaterData US Water Hardness (utility report, June 15, 2022), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.