What is the address of Mclain POTW?

The address on the plant’s EPA facility record is 105 South Church Avenue, Mc Lain, MS 39456, in Greene County. Its coordinates are 31.1091, -88.8175. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Mclain POTW treat?

Mclain POTW is permitted for a design flow of 0.04 MGD. Its average daily flow is not available in the current EPA data.

What treatment technology does Mclain POTW use?

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

What is the NPDES permit for Mclain POTW?

The facility discharges under NPDES permit MS0035165, currently effective, expiring January 2030.

Is Mclain POTW in compliance?

Discharge monitoring reports show 26 violations at Mclain POTW in the last three years, 26 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Mclain POTW and how do I contact them?

Mclain POTW is a publicly owned treatment works in Mc Lain, Mississippi. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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Mclain POTW

105 South Church Avenue, Mc Lain, MS 39456 · Greene County · Publicly Owned Treatment Works

Average flow: —

Design flow: 0.04 MGD

NPDES permit: MS0035165; Effective

Permit expires: January 2030

Population served: —; CWNS 2022

Mclain POTW is a publicly owned wastewater treatment works in Mc Lain, Greene County, Mississippi. It discharges under NPDES permit MS0035165 (effective), which expires in January 2030, with 26 recorded violations in the last three years.

Treatment technology

One treatment structure or unit process identified at Mclain POTW.

Available with a free Klarifi account

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

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Compliance snapshot (last 3 years)

Total violations: 26

Effluent violations: 26

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

Key contacts

Decision-makers at Mclain POTW.

No verified contacts on file yet

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Nearby wastewater treatment plants in Mississippi

New Augusta POTW

New Augusta · 14 mi away

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Lucedale POTW

Lucedale · 20 mi away

0.27 MGD

State Line POTW

State Line · 30 mi away

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Mississippi Investors Ix Llc, Beaver Dam Crossing Sewer Treatment Plant

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Lumberton POTW

Lumberton · 38 mi away

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Waynesboro POTW

Waynesboro · 38 mi away

1.07 MGD

Harrison County Utility Authority, Tradition Development

Gulfport · 41 mi away

0.09 MGD

Ellisville Potw, North

Ellisville · 41 mi away

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Mclain POTW: 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 September 16, 2026.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Equalization tank · Centrate · all terms

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