Water hardness in Butler County
Water hardness in Butler County, OH ranges from 7.6 to 20 grains per gallon depending on which utility serves the address.
| City | Hardness | Utility |
|---|---|---|
| Fairfield | 7.7Hard | City of Fairfield Water Division |
| Hamilton | 7.6Hard | City of Hamilton |
| Middletown | Not published | City of Middletown Water Treatment |
| Monroe | 7.7Hard | Butler County Water & Sewer |
| Oxford | 20 to 22Very hard | City of Oxford Water Treatment |
| Trenton | Not published | City of Trenton Water Department |
| West Chester | 7.7Hard | Butler County Water & Sewer |
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. Where a utility publishes no figure (Middletown, Trenton), we test at the property rather than print a guess.
How hard is the water in Butler County, OH?
Water hardness in Butler County, OH ranges from 7.6 to 20 grains per gallon depending on which utility serves the address. 6 different utilities operate in the county: Butler County Water & Sewer, City of Fairfield Water Division, City of Hamilton, City of Middletown Water Treatment, City of Oxford Water Treatment, City of Trenton Water Department.
Which part of Butler County has the hardest water?
Oxford at 20 to 22 grains per gallon, supplied by City of Oxford Water Treatment. The softest is Hamilton at 7.6 grains. They are in the same county but on different systems, which is why the numbers differ.
Do I need a water softener in Butler County, OH?
Water above 7 grains per gallon is classed as hard and causes scale in water heaters, fixtures and appliances. Most of Butler 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 Butler County water?
Hamilton has 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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