Warren County · OH

Franklin, OH

Franklin runs 8 grains per gallon through Warren County Water & Sewer, which puts it in the hard band. Hard, but not extreme. It is enough to leave scale in a water heater over time, which is what shortens its life. Lime softened at the Franklin Area and Richard Renneker plants.

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Local water profile

8 grains per gallon, hard water, supplied by Warren County Water & Sewer.

Franklin neighborhoods we serve

Downtown Franklin
Carlisle border area

Water profile

Franklin water is 8 grains per gallon.

That is classed as hard water. It comes from Warren County Water & Sewer, per the Warren County 2025 Water Quality Report.

Hardness: 8 grains per gallonHard
Utility: Warren County Water & Sewer
Source: 24 wells across five wellfields
Treatment: Lime softened at the Franklin Area and Richard Renneker plants.

Source: Warren County 2025 Water Quality Report, 2025 reporting year. 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.

What that means here

This is hard water. It will not ruin anything overnight, but scale accumulates inside the water heater over years, which is what shortens its life.

bags of salt a year

At 8 grains, for a four-person household using about 300 gallons a day. Fewer people or a more efficient softener uses less.

grains per gallon

Hard on the Water Quality Association scale. Soft is under 3.5, hard starts at 7, very hard above 10.5.

Common questions

How hard is the water in Franklin, OH?

Water in Franklin, OH is 8 grains per gallon, which is classed as hard water. It is supplied by Warren County Water & Sewer from 24 wells across five wellfields, per the Warren County 2025 Water Quality Report (2025).

Who supplies the water in Franklin, OH?

Franklin is served by Warren County Water & Sewer. The water comes from 24 wells across five wellfields. Lime softened at the Franklin Area and Richard Renneker plants.

Do I need a water softener in Franklin, OH?

At 8 grains per gallon, Franklin water is hard. Water above 7 grains per gallon causes scale in water heaters and fixtures and reduces soap lather, which is the point at which most homes benefit from a softener.

What parts of Franklin do you cover?

All of Franklin, including Downtown Franklin and Carlisle border area. Flat-rate pricing across the whole service area, with no travel charge between neighborhoods.

How much salt will a softener use in Franklin?

At 8 grains per gallon, a four-person household using roughly 300 gallons a day goes through about 6 forty-pound bags of softener salt a year. Smaller households and higher-efficiency softeners use less.

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Local coverage

Franklin, OH: ZIP Codes We Serve

We install and service water treatment systems across 45005.

Franklin, OH: Local Landmarks

Homes near Franklin Lions Club Municipal Park, Clearcreek Park, Hazel Woods Park, Harmon Park, Franklin-Springboro Public Library and Franlin City Hall all draw the same municipal supply.

Franklin, OH: Nearby Streets

Our crews work Middletown Pike, West 6th Street, South Dixie Highway, North Dixie Highway, South River Street, Franklin Lebanon Road, North River Street and North Main Street regularly.

Franklin, OH in the Greater Cincinnati area

Franklin sits in Warren County, part of the Greater Cincinnati area. Water here is supplied and treated at the county and municipal level, so hardness and treatment vary street to street across the region rather than following one regional average. That is why we test at the property before recommending a system. See every community we serve in Warren County.

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