Water hardness in Ohio
Typical Ohio tap water
113mg/L
6.6gpg
Moderately hard
Population-weighted middle value across 192 Ohio cities in the dataset
We have hardness numbers for 108 Ohio cities; 31 of them are county estimates rather than utility figures. Each city page adds the water system's EPA violation record and a softener size for a typical household.
Dot size follows population. Tap a dot for the city page.
4Soft
49Moderately hard
24Hard
31Very hard
Hardest water in Ohio
- Bryan380
- Springfield360
- Xenia356
- Sidney342
- Troy328
- Marysville316
- Marion311
- Middletown303
Softest water in Ohio
All cities in Ohio
| City | mg/L | gpg | Class | Data | EPA health violations |
|---|---|---|---|---|---|
| Columbus | 97 | 5.7 | Moderately hard | Utility report | 1 |
| Cleveland | 111 | 6.5 | Moderately hard | Utility report | 0 |
| Cincinnati | 113 | 6.6 | Moderately hard | Utility report | 0 |
| Toledo | 76 | 4.4 | Moderately hard | Utility report | 1 |
| Akron | 116 | 6.8 | Moderately hard | Utility report | 1 |
| Dayton | 147 | 8.6 | Hard | Utility report | 0 |
| Canton | 285 | 16.7 | Very hard | County estimate | 0 |
| Lorain | 220 | 12.9 | Very hard | County estimate | 0 |
| Hamilton | 105 | 6.1 | Moderately hard | Utility report | 0 |
| Youngstown | 177 | 10.3 | Hard | County estimate | 0 |
| Springfield | 360 | 21.1 | Very hard | County estimate | 0 |
| Kettering | 147 | 8.6 | Hard | Utility report | 2 |
| Elyria | 220 | 12.9 | Very hard | County estimate | 0 |
| Middletown | 303 | 17.7 | Very hard | County estimate | 0 |
| Newark | 77 | 4.5 | Moderately hard | Utility report | 0 |
| Cuyahoga Falls | 116 | 6.8 | Moderately hard | Utility report | 1 |
| Dublin | 97 | 5.7 | Moderately hard | Utility report | 1 |
| Lakewood | 112 | 6.5 | Moderately hard | Utility report | 0 |
| Beavercreek | 149 | 8.7 | Hard | Utility report | 2 |
| Mansfield | 274 | 16.0 | Very hard | County estimate | 7 |
| Mentor | 67 | 3.9 | Moderately hard | Utility report | 0 |
| Delaware | 94 | 5.5 | Moderately hard | Utility report | 0 |
| Grove City | 97 | 5.7 | Moderately hard | Utility report | 1 |
| Fairfield | 111 | 6.5 | Moderately hard | Utility report | 0 |
| Huber Heights | 155 | 9.1 | Hard | Utility report | 0 |
| Reynoldsburg | 97 | 5.7 | Moderately hard | Utility report | 0 |
| Lancaster | 109 | 6.4 | Moderately hard | Utility report | 0 |
| Findlay | 138 | 8.1 | Hard | Utility report | 0 |
| Hilliard | 97 | 5.7 | Moderately hard | Utility report | 1 |
| Warren | 148 | 8.7 | Hard | County estimate | 0 |
| Westerville | 124 | 7.2 | Hard | Utility report | 1 |
| North Ridgeville | 220 | 12.9 | Very hard | County estimate | 0 |
| Gahanna | 96 | 5.6 | Moderately hard | Utility report | 0 |
| Upper Arlington | 97 | 5.7 | Moderately hard | Utility report | 1 |
| Mason | 280 | 16.4 | Very hard | County estimate | – |
| Fairborn | 232 | 13.6 | Very hard | Utility report | 0 |
| Marion | 311 | 18.2 | Very hard | County estimate | – |
| Brunswick | 247 | 14.4 | Very hard | County estimate | – |
| Lima | 301 | 17.6 | Very hard | County estimate | 4 |
| Stow | 220 | 12.9 | Very hard | County estimate | 1 |
| Massillon | 285 | 16.7 | Very hard | County estimate | – |
| North Olmsted | 210 | 12.3 | Very hard | County estimate | – |
| Bowling Green | 265 | 15.5 | Very hard | County estimate | 1 |
| Marysville | 316 | 18.5 | Very hard | County estimate | 0 |
| Kent | 188 | 11.0 | Very hard | County estimate | 0 |
| Green | 220 | 12.9 | Very hard | County estimate | – |
| Troy | 328 | 19.1 | Very hard | County estimate | 0 |
| Wooster | 85 | 5.0 | Moderately hard | Utility report | 0 |
| Avon Lake | 78 | 4.6 | Moderately hard | Utility report | 0 |
| Xenia | 356 | 20.8 | Very hard | County estimate | 1 |
| Pickerington | 97 | 5.7 | Moderately hard | Utility report | 0 |
| Medina | 88 | 5.2 | Moderately hard | Utility report | 0 |
| Avon | 130 | 7.6 | Hard | Utility report | 0 |
| Perrysburg | 85 | 5.0 | Moderately hard | Utility report | 0 |
| Centerville | 142 | 8.3 | Hard | Utility report | 2 |
| Zanesville | 224 | 13.1 | Very hard | County estimate | 0 |
| Barberton | 220 | 12.9 | Very hard | County estimate | 0 |
| Wadsworth | 247 | 14.4 | Very hard | County estimate | 0 |
| Riverside | 149 | 8.7 | Hard | Utility report | 2 |
| Sandusky | 260 | 15.2 | Very hard | County estimate | 0 |
| Solon | 210 | 12.3 | Very hard | County estimate | – |
| Trotwood | 147 | 8.6 | Hard | Utility report | 0 |
| Hudson | 104 | 6.1 | Moderately hard | Utility report | 1 |
| Oxford | 303 | 17.7 | Very hard | County estimate | 0 |
| Chillicothe | 276 | 16.2 | Very hard | County estimate | 0 |
| Alliance | 285 | 16.7 | Very hard | County estimate | 4 |
| Piqua | 49 | 2.9 | Soft | Utility report | 0 |
| Painesville | 90 | 5.3 | Moderately hard | Utility report | 0 |
| Miamisburg | 142 | 8.3 | Hard | Utility report | 0 |
| Sidney | 342 | 20.0 | Very hard | County estimate | 1 |
| Whitehall | 97 | 5.7 | Moderately hard | Utility report | 1 |
| Norwood | 113 | 6.6 | Moderately hard | Utility report | 0 |
| Pataskala | 97 | 5.7 | Moderately hard | Utility report | 0 |
| Powell | 94 | 5.5 | Moderately hard | Utility report | 0 |
| Aurora | 117 | 6.8 | Moderately hard | Utility report | 0 |
| Steubenville | 106 | 6.2 | Moderately hard | Utility report | 4 |
| Ashtabula | 117 | 6.8 | Moderately hard | Calculated from utility data | 1 |
| Fairview Park | 111 | 6.5 | Moderately hard | Utility report | 0 |
| Monroe | 45 | 2.6 | Soft | Utility report | 0 |
| Vandalia | 155 | 9.1 | Hard | Utility report | 0 |
| Circleville | 46 | 2.7 | Soft | Utility report | 0 |
| Worthington | 97 | 5.7 | Moderately hard | Utility report | 1 |
| Clayton | 155 | 9.1 | Hard | Utility report | 0 |
| Englewood | 155 | 9.1 | Hard | Utility report | 0 |
| West Carrollton | 147 | 8.6 | Hard | Utility report | 1 |
| Amelia | 130 | 7.6 | Hard | Calculated from utility data | – |
| Bexley | 97 | 5.7 | Moderately hard | Utility report | 0 |
| New Albany | 97 | 5.7 | Moderately hard | Utility report | 1 |
| Montgomery | 150 | 8.8 | Hard | Utility report | 0 |
| Shiloh | 155 | 9.1 | Hard | Utility report | 0 |
| Canal Winchester | 97 | 5.7 | Moderately hard | Utility report | 0 |
| Beckett Ridge | 111 | 6.5 | Moderately hard | Utility report | 0 |
| Oakwood | 148 | 8.7 | Hard | Utility report | 0 |
| Grandview Heights | 97 | 5.7 | Moderately hard | Utility report | 1 |
| Lincoln Village | 97 | 5.7 | Moderately hard | Utility report | 1 |
| Bainbridge | 117 | 6.8 | Moderately hard | Utility report | 0 |
| Blacklick Estates | 97 | 5.7 | Moderately hard | Utility report | 1 |
| Oberlin | 50 | 2.9 | Soft | Utility report | 2 |
| Bryan | 380 | 22.2 | Very hard | Utility report | 0 |
| Bellbrook | 139 | 8.1 | Hard | Utility report | 1 |
| Obetz | 97 | 5.7 | Moderately hard | Utility report | 1 |
| Moraine | 147 | 8.6 | Hard | Utility report | 2 |
| Granville | 77 | 4.5 | Moderately hard | Utility report | 1 |
| Portage Lakes | 116 | 6.8 | Moderately hard | Utility report | 1 |
| The Village of Indian Hill | 150 | 8.8 | Hard | Utility report | 0 |
| Waterville | 110 | 6.4 | Moderately hard | Utility report | 0 |
| Groveport | 97 | 5.7 | Moderately hard | Utility report | 0 |
| Reminderville | 117 | 6.8 | Moderately hard | Utility report | 0 |
Questions
Is Ohio water hard?
The typical Ohio resident gets about 113 mg/L (6.6 gpg), which is moderately hard. About 45% of people in the cities we track have hard or very hard water.
Which city in Ohio has the hardest water?
Among 108 cities with pages here, Bryan is highest at 380 mg/L.
Which city in Ohio has the softest water?
Monroe, at 45 mg/L.
Other states
- Alabama73
- Alaska110
- Arizona180
- Arkansas39
- California121
- Colorado97
- Connecticut53
- Delaware87
- District of Columbia117
- Florida120
- Georgia28
- Hawaii55
- Idaho118
- Illinois139
- Indiana178
- Iowa183
- Kansas138
- Kentucky134
- Louisiana102
- Maine16
- Maryland105
- Massachusetts38
- Michigan112
- Minnesota160
- Mississippi38
- Missouri121
- Montana116
- Nebraska149
- Nevada232
- New Hampshire20
- New Jersey80
- New Mexico137
- New York31
- North Carolina31
- North Dakota133
- Oklahoma152
- Oregon24
- Pennsylvania127
- Rhode Island42
- South Carolina32
- South Dakota124
- Tennessee89
- Texas112
- Utah231
- Vermont62
- Virginia65
- Washington36
- West Virginia106
- Wisconsin170
- Wyoming191
Hardness data: TapWaterData US Water Hardness, CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.