What is the address of Decatur WWTP?

The address on the plant’s EPA facility record is 1309 Monmouth Road, Decatur, IN 46733, in Adams County. Its coordinates are 40.8478, -84.9301. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Decatur WWTP treat?

Decatur WWTP treats an average of 1.83 MGD and is permitted for a design flow of 3.25 MGD.

What treatment technology does Decatur WWTP use?

Klarifi has identified 2 treatment structures and unit processes at the Decatur facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Decatur WWTP?

The facility discharges under NPDES permit IN0039314, currently effective, expiring August 2030.

Is Decatur WWTP in compliance?

Discharge monitoring reports show 5 violations at Decatur WWTP in the last three years, 5 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Decatur WWTP and how do I contact them?

Decatur WWTP is a publicly owned treatment works in Decatur, Indiana. Klarifi lists 8 verified decision-maker contacts for this facility, available with a free trial.

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Decatur WWTP

1309 Monmouth Road, Decatur, IN 46733 · Adams County · Publicly Owned Treatment Works

Average flow: 1.83 MGD

Design flow: 3.25 MGD

NPDES permit: IN0039314; Effective

Permit expires: August 2030

Population served: 11,474; CWNS 2022

Decatur WWTP is a publicly owned wastewater treatment works in Decatur, Adams County, Indiana treating an average of 1.83 million gallons per day against a permitted design capacity of 3.25 MGD, serving about 11,474 residents. It discharges under NPDES permit IN0039314 (effective), which expires in August 2030, with 5 recorded violations in the last three years.

Treatment technology

2 treatment structures and unit processes identified at Decatur WWTP.

Available with a free Klarifi account

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

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Compliance snapshot (last 3 years)

Total violations: 5

Effluent violations: 5

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

Key contacts

8 verified contacts for Decatur WWTP, with validated emails and direct phone numbers.

Unlock 8 verified contacts (5 more than shown)

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

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Nearby wastewater treatment plants in Indiana

Monroeville WWTP

Monroeville · 9 mi away

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Berne WWTP

Berne · 12 mi away

0.77 MGD

Ossian Wwtp, Town Of

Ossian · 13 mi away

0.69 MGD

Bluffton Wastewater Treatment Facility

Bluffton · 14 mi away

1.81 MGD

Uniondale WWTP

Uniondale · 16 mi away

0.01 MGD

Water Pollution Control Plant

Fort Wayne · 18 mi away

44.71 MGD

Woodburn Municipal Waste Water Treatment Plant

Woodburn · 20 mi away

0.25 MGD

Markle WWTP

Markle · 22 mi away

0.14 MGD

Decatur 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 29, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Activated sludge · Oxidation ditch · all terms

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