Water hardness in Hamilton County
Water hardness in Hamilton County, OH ranges from 7.4 to 10.1 grains per gallon depending on which utility serves the address.
| City | Hardness | Utility |
|---|---|---|
| Anderson Township | 7.4Hard | Greater Cincinnati Water Works |
| Blue Ash | 7.4Hard | Greater Cincinnati Water Works |
| Cincinnati | 7.4Hard | Greater Cincinnati Water Works |
| Forest Park | 7.4Hard | Greater Cincinnati Water Works |
| Harrison | 8Hard | City of Harrison Water Department |
| Indian Hill | 8.8 to 9.9Hard | Indian Hill Water Works |
| Kenwood | 7.4Hard | Greater Cincinnati Water Works |
| Madeira | 8.8 to 9.9Hard | Indian Hill Water Works |
| Montgomery | 7.4Hard | Greater Cincinnati Water Works |
| Norwood | 7.4Hard | City of Norwood Water Works |
| Reading | 7.4Hard | City of Reading Water Department |
| Sharonville | 7.4Hard | Greater Cincinnati Water Works |
| Springdale | 7.4Hard | Greater Cincinnati Water Works |
| Symmes Township | 7.4Hard | Greater Cincinnati Water Works |
| Wyoming | 10.1Hard | City of Wyoming Water Works |
Figures come from each utility's own water quality report. Hardness bands follow the Water Quality Association scale: soft under 3.5 grains, moderate 3.5 to 7, hard 7 to 10.5, very hard above 10.5.
How hard is the water in Hamilton County, OH?
Water hardness in Hamilton County, OH ranges from 7.4 to 10.1 grains per gallon depending on which utility serves the address. 6 different utilities operate in the county: Greater Cincinnati Water Works, Indian Hill Water Works, City of Norwood Water Works, City of Wyoming Water Works, City of Reading Water Department, City of Harrison Water Department.
Which part of Hamilton County has the hardest water?
Wyoming at 10.1 grains per gallon, supplied by City of Wyoming Water Works. The softest is Anderson Township at 7.4 grains. They are in the same county but on different systems, which is why the numbers differ.
Do I need a water softener in Hamilton County, OH?
Water above 7 grains per gallon is classed as hard and causes scale in water heaters, fixtures and appliances. Most of Hamilton County sits at or above that line, so most homes benefit from a softener. The right size depends on your specific address and household.
Is there PFAS in Hamilton County water?
Cincinnati and Indian Hill have tested above the federal PFAS limit finalized in 2024, which takes effect in 2029. EPA has proposed letting systems request until 2031 to meet it. Those levels are legal today and the utilities are working toward compliance. Reverse osmosis at the kitchen tap is the treatment that removes PFAS.
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