What is the address of Norwalk WWTP?

The address on the plant’s EPA facility record is 201 Plank Road, Norwalk, OH 44857, in Huron County. Its coordinates are 41.2645, -82.6141. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Norwalk WWTP treat?

Norwalk WWTP treats an average of 2.5 MGD and is permitted for a design flow of 3.5 MGD.

What treatment technology does Norwalk WWTP use?

Klarifi has identified 3 treatment structures and unit processes at the Norwalk facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Norwalk WWTP?

The facility discharges under NPDES permit OH0052604, currently effective, expiring July 2030.

Is Norwalk WWTP in compliance?

Discharge monitoring reports show 28 violations at Norwalk WWTP in the last three years, 14 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Norwalk WWTP and how do I contact them?

Norwalk WWTP is a publicly owned treatment works in Norwalk, Ohio. Klarifi lists 13 verified decision-maker contacts for this facility, available with a free trial.

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Norwalk WWTP

201 Plank Road, Norwalk, OH 44857 · Huron County · Publicly Owned Treatment Works

Average flow: 2.5 MGD

Design flow: 3.5 MGD

NPDES permit: OH0052604; Effective

Permit expires: July 2030

Population served: 17,015; CWNS 2022

Norwalk WWTP is a publicly owned wastewater treatment works in Norwalk, Huron County, Ohio treating an average of 2.5 million gallons per day against a permitted design capacity of 3.5 MGD, serving about 17,015 residents. It discharges under NPDES permit OH0052604 (effective), which expires in July 2030, with 28 recorded violations in the last three years.

Treatment technology

3 treatment structures and unit processes identified at Norwalk WWTP.

Available with a free Klarifi account

See the full treatment train at Norwalk WWTP: structures, unit processes and planned upgrades, with exact unit counts.

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Compliance snapshot (last 3 years)

Total violations: 28

Effluent violations: 14

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

Key contacts

13 verified contacts for Norwalk WWTP, with validated emails and direct phone numbers.

Unlock 13 verified contacts (10 more than shown)

Names, validated emails and direct phone numbers for decision-makers at Norwalk WWTP, plus the full compliance history and discharge data.

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Nearby wastewater treatment plants in Ohio

Will-O-Brook Mhp

Norwalk · 1 mi away

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Milan WWTP

Milan · 3 mi away

0.13 MGD

Edison High School

Milan · 3 mi away

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Norwalk Elks Lodge No 730 #2

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Monroeville WWTP

Monroeville · 4 mi away

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Alpine Trail Mhp

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Odot Huron County Garage

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Western Reserve Elem Jr & Sr Hs

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Norwalk 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 October 26, 2026; facility record last updated March 6, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Lift station · Sludge dewatering · all terms

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