Hard water in Canton, OH
County estimate from 1,509 water samples in Stark County · July 2026
- OH typical
- 113 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 32k grain
- Data
- County estimate
Water samples from around Canton put hardness at about 285 mg/L (16.7 gpg), which would be very hard on the USGS scale. Treat this as a rough guide: it is the median of 1,509 samples taken across Stark County, mostly wells and streams, not a test of Canton's treated tap water.
At 285 mg/L, Canton is 172 mg/L above the typical Ohio figure of 113. None of the 10 nearest cities we track has harder water. The range nearby runs from 116 mg/L in Portage Lakes to 285 in Massillon.
What 285 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 285 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 × 16.7 gpg = 3,751 grains a day. A 32,000-grain unit regenerates about every 8 days.
EPA record for Canton's water system
No health-based violations since 2016
Serves about 107,113 people from groundwater.
- Health-based
- 0
- Monitoring or reporting
- 4
- Open now
- 1
EPA lists this system as serving Canton.
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 Canton water hard?
Yes. It measures about 285 mg/L (16.7 grains per gallon), which the USGS classes as very hard.
What is the water hardness in Canton in grains per gallon?
About 16.7 gpg. One grain per gallon equals 17.1 mg/L, so 285 mg/L divided by 17.1 gives 16.7.
What size water softener do I need in Canton?
For 3 people using 75 gallons each per day, 16.7 gpg works out to about 3,751 grains a day. A 32,000-grain softener covers that with a regeneration about every 8 days.
Has the Canton water system had EPA violations?
EPA records show no health-based violations for Canton Public Water System since 2016. There were also 4 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- Massillon285 mg/LVery hard
- Green220 mg/LVery hard
- Alliance285 mg/LVery hard
- Portage Lakes116 mg/LModerately hard
- Barberton220 mg/LVery hard
- Akron116 mg/LModerately hard
- Kent188 mg/LVery hard
- Wadsworth247 mg/LVery hard
- Stow220 mg/LVery hard
- Cuyahoga Falls116 mg/LModerately hard
Hardness data: TapWaterData US Water Hardness (county estimate, July 4, 2026), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.