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State directory · dataset 2026.08

Water utilities serving Ohio

Browse 115 indexed systems and see how frequently the directory identified public payment, fee, leak, assistance, and emergency information. Coverage describes the research record—not utility performance.

Ohio research snapshot

Public detail found in indexed records

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72%

Online portal identified

83 of 115

15%

Public fee detail

17 of 115

23%

Leak policy detail

26 of 115

23%

Assistance detail

26 of 115

31%

Emergency route

36 of 115

Service area: Columbus and 23 contracted Central Ohio communities

Population: Columbus Water & Power's 2025 official water-quality material says the Division of Water delivers drinking water to approximately 1.4 million consumers in Columbus and contracted suburban service areas. The system serves 23 communities, operates three treatment plants with a fourth in design, and maintains approximately 300,000 water meters.

Billing fields: 7 of 7 documented
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Service area: Greater Cincinnati region, including Cincinnati and parts of Hamilton, Butler, Warren, and Clermont counties in Ohio plus Boone County, Kentucky

Population: More than 1.1 million people in the regional service area; GCWW supplies more than 43 billion gallons annually and also acts as a billing agent for some local sewer and stormwater utilities.

Billing fields: 7 of 7 documented
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Service area: Akron and retail/contract communities in Summit County, including Fairlawn, Mogadore, and portions of Bath, Boston, Copley, Coventry, Cuyahoga Falls, Hudson, Springfield, Stow, Twinsburg, and Twinsburg Township

Population: More than 300,000 people; the City’s budget materials describe more than 85,000 accounts, while the City’s 2023 Annual Information Statement reports nearly 90,000 accounts serving Akron, six other municipalities, and parts of five adjacent townships.

Billing fields: 7 of 7 documented
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Service area: Toledo and regional contract customers in Lucas, Wood, and Fulton Counties, including portions of southern Monroe County, Michigan, plus Maumee, Perrysburg, Sylvania, Northwestern Water and Sewer District, South County Water District, and Whitehouse

Population: Approximately 500,000 people across Toledo and the regional water-supply footprint. City materials describe roughly 130,000 water customers and identify a regional system serving Toledo, portions of Lucas/Wood/Fulton Counties, and southern Monroe County, Michigan; current Water Distribution materials report approximately 136,000 metered accounts.

Billing fields: 7 of 7 documented
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Private Investor-Owned Utility

Aqua Ohio (Mentor service area)

Service area: Mentor and Aqua Ohio service area

Population: 74,500 people served according to the EPA queue; Aqua Ohio is the designated private water company serving the Mentor system under the City of Mentor water regulations.

Billing fields: 4 of 7 documented
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Private Investor-Owned Utility

Ross County Water Company, Inc.

OH7101412

Service area: Rural Ross, Pike, Vinton, Hocking, Pickaway, and Jackson County service area

Population: 35,345 people (EPA SDWA queue estimate for OH7101412)

Billing fields: 5 of 7 documented
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Public Water Authority

NAWA Water Utility

OH5553612

Service area: Northeast Ohio / NAWA service area

Population: 29,974 people (EPA SDWA queue estimate for OH5553612)

Billing fields: 0 of 7 documented
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Public Water Authority

Del-Co Water Company

OH2100221

Service area: Delaware County / Alum Creek service area

Population: 29,928 people (EPA SDWA queue estimate for OH2100221)

Billing fields: 0 of 7 documented
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Municipal Department

WARREN COUNTY

OH8301512

Service area: Service area listed in EPA SDWIS

Population: 81975 people (EPA SDWIS 2026Q2 active CWS estimate for OH8301512)

Billing fields: 0 of 7 documented
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Municipal Department

PORTSMOUTH CITY

OH7300111

Service area: PORTSMOUTH

Population: 40475 people (EPA SDWIS 2026Q2 active CWS estimate for OH7300111)

Billing fields: 0 of 7 documented
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Ohio directory notes

How to compare water utilities in Ohio

This state hub brings together 115 indexed community water systems, from city departments and public authorities to investor-owned systems and smaller regional providers. A service area may cross municipal boundaries, so use the provider name and service address on your bill when choosing a profile.

The most important distinction is between a directory listing and an official account channel. US Water Bill Pay provides a structured starting point; the utility’s own payment portal, published rate schedule, customer-service office, and mailed notice control your account. Compare the payment route, billing frequency, emergency number, and customer-protection notes before relying on a page for a time-sensitive decision.

If you are helping a household with a high bill, leak, or delinquency notice, open the utility profile and review the payment, shut-off, and leak-adjustment guides together. Keep the bill, account number, confirmation receipts, repair records, and notice dates available when speaking with the provider.