Hard water in Lake in the Hills, IL
Reported by Lake in the Hills · June 2022
- IL typical
- 139 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 32k grain
- Data
- Utility report
Lake in the Hills water measures 283 mg/L (16.6 gpg) of hardness, very hard by USGS standards. The number comes from Lake in the Hills, dated June 2022. Reports for this system disagree, with values from 283 to 444 mg/L.
Lake in the Hills sits 144 mg/L above the typical Illinois figure of 139. Of the 10 nearest cities we track, 5 have softer water and 5 have harder. The range nearby runs from 14 mg/L in West Dundee to 573 in Lake Barrington.
What 283 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 283 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 × 16.6 gpg = 3,724 grains a day. A 32,000-grain unit regenerates about every 8 days.
EPA record for Lake in the Hills's water system
No health-based violations since 2016
Serves about 28,661 people from groundwater.
- Health-based
- 0
- Monitoring or reporting
- 2
- 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 in the Hills water hard?
Yes. It measures about 283 mg/L (16.6 grains per gallon), which the USGS classes as very hard.
What is the water hardness in Lake in the Hills in grains per gallon?
About 16.6 gpg. One grain per gallon equals 17.1 mg/L, so 283 mg/L divided by 17.1 gives 16.6.
What size water softener do I need in Lake in the Hills?
For 3 people using 75 gallons each per day, 16.6 gpg works out to about 3,724 grains a day. A 32,000-grain softener covers that with a regeneration about every 8 days.
Has the Lake in the Hills water system had EPA violations?
EPA records show no health-based violations for Lake in the Hills since 2016. There were also 2 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- Algonquin378 mg/LVery hard
- Crystal Lake388 mg/LVery hard
- Cary378 mg/LVery hard
- Carpentersville67 mg/LModerately hard
- West Dundee14 mg/LSoft
- Gilberts328 mg/LVery hard
- Huntley31 mg/LSoft
- Lake Barrington573 mg/LVery hard
- Pingree Grove65 mg/LModerately hard
- Elgin111 mg/LModerately hard
Hardness data: TapWaterData US Water Hardness (utility report, June 13, 2022), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.