Hard water in Lake Barrington, IL
Reported by Lake Barrington · May 2022
- IL typical
- 139 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 64k grain
- Data
- Utility report
Lake Barrington water measures 573 mg/L (33.5 gpg) of hardness, very hard by USGS standards. The number comes from Lake Barrington, dated May 2022.
At 573 mg/L, Lake Barrington is 434 mg/L above the typical Illinois figure of 139. None of the 10 nearest cities we track has harder water. The range nearby runs from 67 mg/L in Carpentersville to 388 in Crystal Lake.
What 573 mg/L means at home
Scale forms fast here. Kettles and coffee makers need regular descaling, and showerheads clog unless you clean them.
Tank water heaters collect mineral sediment that insulates the water from the burner, so flushing the tank matters more than usual.
Dishes and glass shower doors spot easily. Soap scum and a dull film on hair or laundry are common complaints.
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
At 573 mg/L most of the trouble is scale, and only a few things deal with it.
Ion-exchange water softener
The standard whole-house fix. It swaps calcium and magnesium for sodium or potassium and needs salt plus a drain. Size it with the calculator below.
Salt-free conditioner
No salt and no drain line. It changes how minerals form scale instead of removing them, so water still tests hard.
Reverse osmosis or carbon filter
Under-sink reverse osmosis removes minerals from drinking water only. Plain carbon filters improve taste but do not soften.
3 people × 75 gallons a day × 33.5 gpg = 7,540 grains a day. A 64,000-grain unit regenerates about every 8 days.
EPA record for Lake Barrington's water system
No health-based violations since 2016
Serves about 500 people from groundwater.
- Health-based
- 0
- Monitoring or reporting
- 0
- Open now
- 0
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 Lake Barrington water hard?
Yes. It measures about 573 mg/L (33.5 grains per gallon), which the USGS classes as very hard.
What is the water hardness in Lake Barrington in grains per gallon?
About 33.5 gpg. One grain per gallon equals 17.1 mg/L, so 573 mg/L divided by 17.1 gives 33.5.
What size water softener do I need in Lake Barrington?
For 3 people using 75 gallons each per day, 33.5 gpg works out to about 7,540 grains a day. A 64,000-grain softener covers that with a regeneration about every 8 days.
Has the Lake Barrington water system had EPA violations?
EPA records show no health-based violations for Lake Barrington since 2016.
Nearby cities
- Cary378 mg/LVery hard
- Lake Zurich84 mg/LModerately hard
- Wauconda146 mg/LHard
- Hawthorn Woods134 mg/LHard
- Lake in the Hills283 mg/LVery hard
- Volo146 mg/LHard
- Algonquin378 mg/LVery hard
- Crystal Lake388 mg/LVery hard
- Carpentersville67 mg/LModerately hard
- Mundelein250 mg/LVery hard
Hardness data: TapWaterData US Water Hardness (utility report, May 18, 2022), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.