How hard is the water in Elgin, IL?
Reported by Elgin · August 2024
- IL typical
- 139 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
Tap water in Elgin has about 111 mg/L of hardness, which is 6.5 grains per gallon. On the USGS scale that counts as moderately hard. The number comes from Elgin, dated August 2024.
Elgin sits 28 mg/L below the typical Illinois figure of 139. Of the 10 nearest cities we track, 3 have softer water and 7 have harder. The range nearby runs from 14 mg/L in West Dundee to 395 in South Elgin.
What 111 mg/L means at home
You may see faint white spots on glasses and shower doors after the water dries.
Scale builds up slowly. A kettle or coffee maker needs descaling now and then, maybe every few months.
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
Optional. Plenty of households at this level live with it and descale the kettle now and then.
Water softener
Worth a look if spots on glass bother you, or if your tankless water heater manual asks for softer water.
Carbon filter
Improves taste and removes chlorine. It leaves calcium and magnesium in place.
3 people × 75 gallons a day × 6.5 gpg = 1,460 grains a day. A 24,000-grain unit regenerates about every 16 days.
EPA record for Elgin's water system
No health-based violations since 2016
Serves about 114,797 people from surface water.
- Health-based
- 0
- Monitoring or reporting
- 9
- 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 Elgin water hard?
Somewhat. It measures about 111 mg/L (6.5 grains per gallon), which the USGS classes as moderately hard.
What is the water hardness in Elgin in grains per gallon?
About 6.5 gpg. One grain per gallon equals 17.1 mg/L, so 111 mg/L divided by 17.1 gives 6.5.
What size water softener do I need in Elgin?
For 3 people using 75 gallons each per day, 6.5 gpg works out to about 1,460 grains a day. A 24,000-grain softener covers that with a regeneration about every 16 days.
Has the Elgin water system had EPA violations?
EPA records show no health-based violations for Elgin since 2016. There were also 9 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- South Elgin395 mg/LVery hard
- West Dundee14 mg/LSoft
- Gilberts328 mg/LVery hard
- Carpentersville67 mg/LModerately hard
- Pingree Grove65 mg/LModerately hard
- Streamwood229 mg/LVery hard
- St. Charles215 mg/LVery hard
- Algonquin378 mg/LVery hard
- Bartlett287 mg/LVery hard
- Hoffman Estates229 mg/LVery hard
Hardness data: TapWaterData US Water Hardness (utility report, August 27, 2024), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.