Water Heater Repair in Mount Vernon, OH
More than a third of Mount Vernon homes were built before 1940, and the Kokosing River runs past the city behind a levee system. If your water heater has quit, is leaking or got wet in a flood, call and get a plumber out.
What shapes water heater trouble in Mount Vernon
City wells along the Kokosing
Mount Vernon's water plant draws from city wells in a well field at Riverside Park, plus one more well on the west side of the Kokosing River. The water comes from the Buried Valley Aquifer, which runs along part of the river, and the city's report notes that the water table there is less than 15 feet down. In the city's 2022 lead and copper sampling, none of the 30 homes tested was over the action level for either metal.
No lead found, some galvanized
By March 2025 the city had inspected more than 2,500 water service lines and found no lead, and it says it has no record of ever using or allowing lead lines. Some owners have been told their line is galvanized steel and needs replacement, which can mean the city's side, the owner's side or both. No federal, state or city rule requires owners to replace galvanized lines, but the city swaps them for copper when it upgrades water lines. Questions go to the Engineering Office at 740-392-9528.
The levee and the west end
The National Weather Service's Kokosing River gauge puts the FEMA 1% flood level at 14 feet, when the river approaches the top of the levee. Its notes say that at 14.5 feet a levee breach would flood Mt. Vernon and Maplewood Avenues and the streets from Cherry to Maple, with backwater along Center, Curtis and Adams Runs. The highest crest on record there, 18.19 feet, came in January 1959. In 2024 the city began measuring the elevation of every house in the west end and funded new river modeling, the first since 1979.
If floodwater reaches your heater's burner, controls or insulation, FEMA's repair guide calls for replacing it. Don't relight a flooded gas heater yourself. Shut off its gas or power and have it checked.
Older houses on Columbia Gas
The median Mount Vernon home was built in 1955, and about 78% date from before 1980. About 77% of homes heat with gas and 19% with electricity. Columbia Gas launched a project to replace aging gas mains and service lines downtown, in the area bounded by Gay, Division, High and Howard Streets, and to move inside gas meters outdoors. In older houses, look at the shutoff valves, flex connectors and venting whenever the heater is serviced.
The city doesn't run one trash service. Its new resident guide lists five permitted haulers, so ask yours how to get rid of an old water heater.
Safe steps for Mount Vernon homes
- Leaking? Close the cold water valve on top of the tank.
- Turn off the gas valve or the breaker for the heater.
- Gas smell? Columbia Gas of Ohio serves Mount Vernon. Leave the house, then call 911 and your gas company from outside. For Columbia Gas of Ohio, that's 1-800-344-4077.
Repair, replacement and emergencies

Water Heater Repair
Gas, electric and tankless repairs, from pilot lights to heating elements.
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No Hot Water
Cold shower this morning? Get the cause found and fixed fast.
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Leaking Water Heater
Water around the tank or a dripping relief valve. Act before it floods.
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Emergency Water Heater Repair
Burst tank, gas smell or water everywhere. Call right away.
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Water Heater Replacement
When repair no longer makes sense, get a new tank or tankless unit.
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Tankless Water Heater Repair
Error codes, lukewarm water and scale buildup on tankless units.
Learn moreMount Vernon water heater questions
Who is the gas company in Mount Vernon, OH?
Columbia Gas of Ohio, which launched a project to replace aging gas lines downtown. If you smell gas, leave first, then call 911 and Columbia Gas at 1-800-344-4077 from outside.
Where does Mount Vernon's water come from?
From city wells at Riverside Park and one more on the west side of the Kokosing River, all drawing on the Buried Valley Aquifer.
Does Mount Vernon have lead water lines?
The city has inspected more than 2,500 service lines and found no lead. Some galvanized lines have been flagged for replacement.
My heater sat in floodwater. Can I keep it?
FEMA says to replace a heater if water reached the burner, controls or insulation. Turn off its gas or power and have it checked before using it.
Where these local facts come from
- US Census Bureau, American Community Survey 2020-2024 (via Census Reporter)
- City of Mount Vernon, Water Quality Report (2023 testing)
- Knox Pages, Mount Vernon conducts EPA-required water service line inventory (March 17, 2025)
- NOAA National Water Prediction Service, Kokosing River at Mt Vernon
- Knox Pages, status of evaluating the flood plain in Mount Vernon's west end (April 21, 2024)
- FEMA and American Red Cross, Repairing Your Flooded Home (FEMA P-234)
- Mount Vernon News, Columbia Gas beginning natural gas line replacement project in Mount Vernon
- City of Mount Vernon, new resident welcome flyer
- Columbia Gas of Ohio, report gas leaks
Figures are the latest published by each source. Pricing and availability are set by the plumber.
No hot water in Mount Vernon?
Call now for water heater repair or replacement.