Water filtration in Franklin
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.
See every city in Warren County.
Local water profile
8 grains per gallon — hard water, supplied by Warren County Water & Sewer.
Neighborhoods we serve
- Downtown Franklin
- Carlisle border area
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.
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.
At 8 grains, for a four-person household using about 300 gallons a day. Fewer people or a more efficient softener uses less.
Hard on the Water Quality Association scale. Soft is under 3.5, hard starts at 7, very hard above 10.5.
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.
What we install in Franklin
Complete Home — City
Softens every drop. Filters every tap. Polishes your drinking water
Complete Home — Well
The well-water version, sized for iron, sulfur, and high hardness
Reverse Osmosis
Drinking water only. Installed under the kitchen sink
Sediment Filter
Protects every system downstream from grit and rust
An Ohio business — local install crews
- Same flat price before any recommendation
- Licensed, insured, locally-trained install team
- Lifetime warranty on every whole-home tank
- Transparent flat-rate pricing — no surprise add-ons
- 24-hour response on every quote request
Get your install quote in Franklin
We'll reach out within 24 hours.
Ready for clean water in Franklin?
Same flat price. Free installation. Lifetime warranty.