How hard is the water in Grandview Heights, OH?
Reported by Columbus Public Water System · October 2025
- OH typical
- 113 mg/L
- EPA health violations since 2016
- 1
- Softener for 3 people
- 24k grain
- Data
- Utility report
Tap water in Grandview Heights has about 97 mg/L of hardness, which is 5.7 grains per gallon. On the USGS scale that counts as moderately hard. The number comes from Columbus Public Water System, dated October 2025.
At 97 mg/L, Grandview Heights is 16 mg/L below the typical Ohio figure of 113. None of the 10 nearest cities we track has harder water. The range nearby runs from 96 mg/L in Gahanna to 97 in Columbus.
What 97 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 × 5.7 gpg = 1,274 grains a day. A 24,000-grain unit regenerates about every 18 days.
EPA record for Grandview Heights's water system
1 health-based violation since 2016
Serves about 1,309,468 people from surface water.
- Health-based
- 1
- Monitoring or reporting
- 0
- Open now
- 0
TapWaterData ties Grandview Heights to this system. EPA's service-area records do not name Grandview Heights, so check the utility printed on your water bill.
| Contaminant or rule | Violations | Period | Status |
|---|---|---|---|
| Nitrateoften from fertilizer or septic systems | 1 | 2016 | Resolved |
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 Grandview Heights water hard?
Somewhat. It measures about 97 mg/L (5.7 grains per gallon), which the USGS classes as moderately hard.
What is the water hardness in Grandview Heights in grains per gallon?
About 5.7 gpg. One grain per gallon equals 17.1 mg/L, so 97 mg/L divided by 17.1 gives 5.7.
What size water softener do I need in Grandview Heights?
For 3 people using 75 gallons each per day, 5.7 gpg works out to about 1,274 grains a day. A 24,000-grain softener covers that with a regeneration about every 18 days.
Has the Grandview Heights water system had EPA violations?
EPA records show 1 health-based violation for Columbus Public Water System since 2016, involving Nitrate.
Nearby cities
- Columbus97 mg/LModerately hard
- Upper Arlington97 mg/LModerately hard
- Lincoln Village97 mg/LModerately hard
- Bexley97 mg/LModerately hard
- Hilliard97 mg/LModerately hard
- Grove City97 mg/LModerately hard
- Worthington97 mg/LModerately hard
- Whitehall97 mg/LModerately hard
- Gahanna96 mg/LModerately hard
- Obetz97 mg/LModerately hard
Hardness data: TapWaterData US Water Hardness (utility report, October 27, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.