What is the address of Clayton WWTP?

The address on the plant’s EPA facility record is Sr 39 & Clayton 1 Mi SE Of, Clayton, IN 46118, in Hendricks County. Its coordinates are 39.6815, -86.5138. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Clayton WWTP treat?

Clayton WWTP treats an average of 0.17 MGD and is permitted for a design flow of 0.3 MGD.

What treatment technology does Clayton WWTP use?

Klarifi has identified one treatment structure or unit process at the Clayton facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Clayton WWTP?

The facility discharges under NPDES permit IN0021431, currently effective, expiring February 2029.

Is Clayton WWTP in compliance?

Discharge monitoring reports show 24 violations at Clayton WWTP in the last three years, 1 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Clayton WWTP and how do I contact them?

Clayton WWTP is a publicly owned treatment works in Clayton, Indiana. Klarifi lists 1 verified decision-maker contact for this facility, available with a free trial.

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Clayton WWTP

Sr 39 & Clayton 1 Mi SE Of, Clayton, IN 46118 · Hendricks County · Publicly Owned Treatment Works

Average flow: 0.17 MGD

Design flow: 0.3 MGD

NPDES permit: IN0021431; Effective

Permit expires: February 2029

Population served: 908; CWNS 2022

Clayton WWTP is a publicly owned wastewater treatment works in Clayton, Hendricks County, Indiana treating an average of 0.17 million gallons per day against a permitted design capacity of 0.3 MGD, serving about 908 residents. It discharges under NPDES permit IN0021431 (effective), which expires in February 2029, with 24 recorded violations in the last three years.

Treatment technology

One treatment structure or unit process identified at Clayton WWTP.

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

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Compliance snapshot (last 3 years)

Total violations: 24

Effluent violations: 1

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

Key contacts

1 verified contact for Clayton WWTP, with validated emails and direct phone numbers.

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

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Nearby wastewater treatment plants in Indiana

Plainfield North Water Pollution Control Facility

Plainfield · 6 mi away

2.4 MGD

Amo-Coatesville Conservancy District WWTP

Amo · 7 mi away

0.07 MGD

Monrovia WWTP

Monrovia · 7 mi away

0.26 MGD

Stilesville WWTP

Stilesville · 7 mi away

0.06 MGD

West Central Conservancy Dist

Avon · 8 mi away

2.39 MGD

Mooresville, Town Of

Mooresville · 9 mi away

1.5 MGD

Hendricks County Rsd

Avon · 11 mi away

2.1 MGD

Clear Creek Conservancy District

Coatesville · 12 mi away

1.15 MGD

Clayton 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 May 18, 2025.

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

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