Hamilton County · OH

Montgomery, OH

Montgomery runs 7.4 grains per gallon through Greater Cincinnati Water Works, 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. Granular activated carbon and UV. No softening, the hardness you get is what the river carries.

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Local water profile

7.4 grains per gallon, hard water, supplied by Greater Cincinnati Water Works.

Montgomery neighborhoods we serve

Old Montgomery
Sycamore corridor

Water profile

Montgomery water is 7.4 grains per gallon.

That is classed as hard water. It comes from Greater Cincinnati Water Works, per the GCWW 2025 Water Quality Report.

Hardness: 7.4 grains per gallonHard
Utility: Greater Cincinnati Water Works
Source: Ohio River, treated at the Richard Miller plant
Treatment: Granular activated carbon and UV. No softening, the hardness you get is what the river carries.
Worth knowing: Most of Montgomery is on GCWW. Some addresses are served by Indian Hill Water Works instead, which runs softer at 8.8 to 9.9 grains.

Source: GCWW 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 7.4 grains, for a four-person household using about 300 gallons a day. Fewer people or a more efficient softener uses less.

7.4

grains per gallon

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

Wyoming, in the same county, runs about 1.4x harder at 10.1 grains. Hardness here is set by which utility serves the address, not by the county line.

Common questions

How hard is the water in Montgomery, OH?

Water in Montgomery, OH is 7.4 grains per gallon, which is classed as hard water. It is supplied by Greater Cincinnati Water Works from ohio River, treated at the Richard Miller plant, per the GCWW 2025 Water Quality Report (2025).

Who supplies the water in Montgomery, OH?

Montgomery is served by Greater Cincinnati Water Works. The water comes from ohio River, treated at the Richard Miller plant. Granular activated carbon and UV. No softening, the hardness you get is what the river carries.

Do I need a water softener in Montgomery, OH?

At 7.4 grains per gallon, Montgomery 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 Montgomery do you cover?

All of Montgomery, including Old Montgomery and Sycamore corridor. Flat-rate pricing across the whole service area, with no travel charge between neighborhoods.

How much salt will a softener use in Montgomery?

At 7.4 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.

Is anything unusual about Montgomery water?

Most of Montgomery is on GCWW. Some addresses are served by Indian Hill Water Works instead, which runs softer at 8.8 to 9.9 grains.

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Local coverage

Montgomery, OH: ZIP Codes We Serve

We install and service water treatment systems across 45242, 45249.

Montgomery, OH: Local Landmarks

Homes near Swaim Park, Weller Park, Pfeiffer Park, Montgomery Park, Montgomery City Hall and Sycamore High School all draw the same municipal supply.

Montgomery, OH: Nearby Streets

Our crews work Remington Road, Montgomery Road, Ronald Reagan Cross County Highway and Pfeiffer Road regularly.

Montgomery, OH in the Greater Cincinnati area

Montgomery sits in Hamilton 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 Hamilton County.

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