World wastewater treatment plant observatory · data as reported by each inventory

Wastewater treatment plants in United States · Ohio

808 inventory records · EPA Clean Watersheds Needs Survey 2022

Data years: 2022. The inventory date does not establish current operation.

808 results

Name	Native size	Year
Marion Co Bumford Rd WWTP SD #6AMarion	0.006 MGD (million gallons per day)	2022
Nashville WWTP and SewersNashville	0.005 MGD (million gallons per day)	2022
Wayne Co Attention Center WWTPWooster	0.005 MGD (million gallons per day)	2022
Williams Co Hickory Hills WWTPBryan	0.005 MGD (million gallons per day)	2022
Madison Co Wissalohichan SSD WWTP & SewersWest Jefferson	0.004 MGD (million gallons per day)	2022
Wayne County Airport WWTPSmithville	0.002 MGD (million gallons per day)	2022
New Franklin WWTP and Collection SystemAkron	0.002 MGD (million gallons per day)	2022
Village of Newtown Moundview Park WWTPCincinnati	0.001 MGD (million gallons per day)	2022

Regulatory context

General reference. This is not an exhaustive review of applicable law.

United States: Clean Water Act / NPDES

NPDES regulates pollutant discharges from point sources to waters of the United States. The permit sets limits and monitoring conditions. A CWNS code identifies an inventory record, not an NPDES permit.

Permit identifier and permitting authority: EPA or an authorized state.
Outfall and receiving water; sewer connections follow a different control route.
Current permit conditions, limits and dated measurements; these are not included in CWNS.

US EPA · NPDES Permit Basics

References reviewed: 2026-11-06. Individual applicability: undetermined. This profile does not establish authorization or compliance.