Water in Delaware
The 2020 census counted 41,302 people in Delaware, in Delaware County. It is about 23 miles from downtown Columbus.
Drinking water in Delaware comes from City of Delaware Public Utilities (own plant). Primary source Olentangy River, can blend with groundwater from wells >200 ft deep (city site)
City of Delaware Public Utilities (own plant) does not publish a hardness figure in the report we reviewed. We test hardness on site in Delaware rather than borrow a number from a neighboring utility.
ZIP codes on file for Delaware are 43015.
Reverse osmosis installation here
Reverse osmosis in Delaware belongs at the kitchen sink, for cooking and drinking. It is not a whole-house softener. A unit should be certified for the reductions you actually want.
Nearby cities
Lewis Center is 6.9 miles from Delaware, in Delaware County. We have not confirmed Lewis Center's public supplier, so that page does not state one.
Powell is 8.0 miles from Delaware, in Delaware County. Water there is Del-Co Water Company, Inc. (per City of Powell utilities page). Published hardness: 7-8 gpg (120-140 mg/L) per Del-Co.
Dublin is 13 miles from Delaware, in Franklin County. Water there is City of Columbus water (Columbus Water & Power) - listed contract community. Published hardness: 5.7-7.3 gpg (98-125 mg/L) 2025 annual avg by plant; system avg 115 mg/L.
Worthington is 13 miles from Delaware, in Franklin County. Water there is City of Columbus water (Columbus Water & Power) - listed contract community. Published hardness: 5.7-7.3 gpg (98-125 mg/L) 2025 annual avg by plant; system avg 115 mg/L.
More in Delaware
Nearby
Questions people ask
Who supplies drinking water in Delaware?
City of Delaware Public Utilities (own plant). City of Delaware Public Utilities (own plant) does not publish a hardness figure in the report we reviewed. We test hardness on site in Delaware rather than borrow a number from a neighboring utility.
Is the water in Delaware hard?
Delaware does not have a hardness figure we are willing to cite. The supplier's report does not list one. A grains-per-gallon test at the house is the number that matters.
How is Delaware different from Lewis Center?
Lewis Center is 6.9 miles from Delaware, in Delaware County. We have not confirmed Lewis Center's public supplier, so that page does not state one.
Which ZIP codes does the Delaware page cover?
43015. Those come from a named place source, not a guessed centroid. Houses just outside the city limits may be on a different supplier.