Hard water in Dyer, IN
Reported by Dyer Water Department · August 2025
- IN typical
- 178 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
The water in Dyer carries roughly 158 mg/L of dissolved calcium and magnesium, or 9.2 grains per gallon. That is hard water. The number comes from Dyer Water Department, dated August 2025.
Dyer sits 20 mg/L below the typical Indiana figure of 178. Of the 10 nearest cities we track, 2 have softer water and 8 have harder. The range nearby runs from 134 mg/L in Highland to 210 in Munster.
What 158 mg/L means at home
Expect white crust on faucets and showerheads, plus spots on dishes that come out of the dishwasher.
Kettles collect scale quickly. Water heaters build up sediment at the bottom of the tank, which makes them work harder over time.
Soap and detergent need a little more to lather, and soap scum shows up in the tub.
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 158 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 × 9.2 gpg = 2,079 grains a day. A 24,000-grain unit regenerates about every 11 days.
EPA record for Dyer's water system
No health-based violations since 2016
Serves about 16,800 people from surface water.
- Health-based
- 0
- Monitoring or reporting
- 1
- 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 Dyer water hard?
Yes. It measures about 158 mg/L (9.2 grains per gallon), which the USGS classes as hard.
What is the water hardness in Dyer in grains per gallon?
About 9.2 gpg. One grain per gallon equals 17.1 mg/L, so 158 mg/L divided by 17.1 gives 9.2.
What size water softener do I need in Dyer?
For 3 people using 75 gallons each per day, 9.2 gpg works out to about 2,079 grains a day. A 24,000-grain softener covers that with a regeneration about every 11 days.
Has the Dyer water system had EPA violations?
EPA records show no health-based violations for Dyer Water Department since 2016. There were also 1 monitoring or reporting violation, which are about late or missing tests and notices.
Nearby cities
- Munster210 mg/LVery hard
- Schererville210 mg/LVery hard
- Highland134 mg/LHard
- St. John210 mg/LVery hard
- Hammond210 mg/LVery hard
- Merrillville210 mg/LVery hard
- Crown Point210 mg/LVery hard
- Gary210 mg/LVery hard
- East Chicago135 mg/LHard
- Hobart210 mg/LVery hard
Hardness data: TapWaterData US Water Hardness (utility report, August 6, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.