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Mounds Stp, City Of

217 First Street, Mounds, IL 62964 · Pulaski County · Publicly Owned Treatment Works

Average flow
0.5 MGD
Design flow
1.27 MGD
NPDES permit
ILG582003
Effective
Permit expires
May 2027
Population served
1,543
CWNS 2022

Mounds Stp, City Of is a publicly owned wastewater treatment works in Mounds, Pulaski County, Illinois treating an average of 0.5 million gallons per day against a permitted design capacity of 1.27 MGD, serving about 1,543 residents. It discharges under NPDES permit ILG582003 (effective), which expires in May 2027, with 54 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in August 2024.

Treatment technology

2 treatment structures and unit processes identified at Mounds Stp, City Of.

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See the full treatment train at Mounds Stp, City Of: structures, unit processes and planned upgrades, with exact unit counts.

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Compliance snapshot (last 3 years)

Total violations
54
Effluent violations
54

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

EPA enforcement history

Federal civil enforcement cases, compliance inspections and informal actions recorded for Mounds Stp, City Of in EPA's ICIS system.

Formal actions
1
1 since FY2020
Compliance actions
$1M
required by EPA orders
EPA inspections
0
none on record

Latest case · Aug 2024

City of Mounds AOC

Administrative order · CWA, NPDES Permit Violations · Final Order Issued · Compliance actions $1M

EPA's description of the case:

“AOC set out measures to address alleged violations and bring facility's into compliance with CWA and NPDES permit.”

Source: EPA ECHO, civil enforcement case 05-2024-0333.

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Every action against Mounds Stp, City Of with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.

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Key contacts

Decision-makers at Mounds Stp, City Of.

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Nearby wastewater treatment plants in Illinois

Olmsted Stp, Village Of

Olmsted · 8 mi away

0.18 MGD

Tamms WWTP

Tamms · 10 mi away

0.06 MGD

Central Alexander County Sd STP

Olive Branch · 11 mi away

0.02 MGD

Ullin Stp, Village Of

Ullin · 12 mi away

0.0089 MGD

New Grand Chain Stp, Village Of

New Grand Chain · 15 mi away

0.01 MGD

Perks Stp, County Of Pulaski

Perks · 16 mi away

0.0031 MGD

Thebes STP

Thebes · 16 mi away

0.01 MGD

Dongola Stp, Village Of

Dongola · 18 mi away

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Mounds Stp, City Of: 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 13, 2026.

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


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