Water treatment in Franklin County, Ohio

Places in Franklin County with their own page: Dublin (City of Columbus water (Columbus Water & Power) - listed contract community); Grove City (City of Columbus water (Columbus Water & Power) - listed contract community); Reynoldsburg (City of Columbus water (Columbus Water & Power) - listed contract community); Westerville (City of Westerville Water Division (own 7.5 MGD plant); Columbus serves 'various parts' of Westerville per Columbus contract list); Hilliard (City of Columbus water (Columbus Water & Power) - listed contract community); Upper Arlington (City of Columbus water (Columbus Water & Power) - listed contract community); Gahanna (City of Columbus water (Columbus Water & Power) - listed contract community); Pickerington (City of Pickerington (own plant); explicitly NOT served by Columbus); Whitehall (City of Columbus water (Columbus Water & Power) - listed contract community); Worthington (City of Columbus water (Columbus Water & Power) - listed contract community); Bexley (City of Columbus water (Columbus Water & Power) - listed contract community); New Albany (City of Columbus water (Columbus Water & Power) - listed contract community); Canal Winchester (City of Canal Winchester (own 2 MGD ion-exchange plant); explicitly NOT served by Columbus); Grandview Heights (City of Columbus water (Columbus Water & Power) - listed contract community); Groveport (City of Columbus water (Columbus Water & Power) - listed contract community); Obetz (City of Columbus water (Columbus Water & Power) - listed contract community); Blacklick (supplier not confirmed); Galloway (supplier not confirmed); Lithopolis (supplier not confirmed); Minerva Park (City of Columbus water (Columbus Water & Power) - listed contract community); Lincoln Village (supplier not confirmed); Blacklick Estates (supplier not confirmed); Huber Ridge (supplier not confirmed); Lake Darby (supplier not confirmed).

Smaller villages and census places in Franklin County are served from this county page rather than a page of their own: Urbancrest, Valleyview, Marble Cliff, Riverlea, Harrisburg, Lockbourne, Brice, Darbydale.

Townships in the location file for Franklin County include Jackson Township, Washington Township, Mifflin Township, Norwich Township, Truro Township, Madison Township, Prairie Township, Sharon Township, Jefferson Township, Plain Township, Franklin Township, Blendon Township, Hamilton Township, Pleasant Township, Clinton Township, Perry Township. Township names are rarely searched, so they do not get standalone pages. Private wells are more common there than inside the cities.

A private water system in Ohio serves fewer than 15 connections and fewer than 25 people. Permits for a new or altered system require total coliform, E. coli, and nitrate samples. The secondary standard for iron is 0.3 mg/L. Manganese greensand filters are a common iron treatment. Nothing on this page claims a specific Franklin County township well contains a contaminant without a sample from that well.