How much wastewater does Grafton WWTP treat?

Grafton WWTP treats an average of 0.62 MGD and is permitted for a design flow of 1.5 MGD.

What is the NPDES permit for Grafton WWTP?

The facility discharges under NPDES permit OH0025372, currently effective, expiring October 2026.

Is Grafton WWTP in compliance?

Discharge monitoring reports show 16 violations at Grafton WWTP in the last three years, 16 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Grafton WWTP and how do I contact them?

Grafton WWTP is a publicly owned treatment works in Grafton, Ohio. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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Grafton WWTP

Grafton, OH · Lorain County · Publicly Owned Treatment Works

Average flow: 0.62 MGD

Design flow: 1.5 MGD

NPDES permit: OH0025372; Effective

Permit expires: October 2026

Population served: 5,594; CWNS 2022

Grafton WWTP is a publicly owned wastewater treatment works in Grafton, Lorain County, Ohio treating an average of 0.62 million gallons per day against a permitted design capacity of 1.5 MGD, serving about 5,594 residents. It discharges under NPDES permit OH0025372 (effective), which expires in October 2026, with 16 recorded violations in the last three years.

Treatment technology

Treatment structures identified at this facility. Exact unit counts are available in Klarifi.

Treatment structure data not yet analyzed for this facility.

Compliance snapshot (last 3 years)

Total violations: 16

Effluent violations: 16

Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.

Key contacts

Decision-makers at Grafton WWTP.

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Grafton WWTP: frequently asked questions

Sources and methodology

Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.

Data refreshed September 11, 2026; facility record last updated November 29, 2025.

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