Clean Water Act discharge permit · NPDES IL0037818

MINONK STP, CITY OF, Minonk, IL: NPDES IL0037818 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
11Pollutants under a numeric limit
6Pollutants with an effluent exceedance

MINONK STP, CITY OF, held by MINONK, CITY OF, holds NPDES permit IL0037818, which discharges to Long Point Creek To Vermillion River. EPA’s file records it issued September 9, 2015 and expiring August 31, 2020. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	MINONK STP, CITY OF
Permittee as filed	MINONK, CITY OF
NPDES ID	IL0037818
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	September 9, 2015
Expiration date	August 31, 2020
Address	Minonk, IL 61760
Receiving water	LONG POINT CREEK TO VERMILLION RIVER
Subwatershed	Long Point Creek (HUC 071300020703)
Program components on file	Biosolids, CSO, POTW
SIC	4952 – Sewerage Systems

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.

Effluent limits and exceedances

11Pollutants on file
11Under a numeric limit
7With a violation of any kind
6With an effluent exceedance

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Coliform, fecal general	2	34	33	June 30, 2021	99,999% over the limit
Oxygen, dissolved [DO]	6	7	7	September 30, 2020	60% over the limit
Solids, total suspended	8	3	3	April 30, 2022	32% over the limit
BOD, 5-day, 20 deg. C	4	2	2	July 31, 2019	28% over the limit
BOD, carbonaceous [5 day, 20 C]	4	2	2	July 31, 2019	54% over the limit
pH	6	2	1	May 31, 2005
Nitrogen, ammonia total [as N]	2	1	0
Flow, in conduit or thru treatment plant	4	0	0
Chlorine, total residual	2	0	0
Overflows	2	0	0
Flow, total	2	0	0

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

1Single-event violations

Date	What EPA recorded	Agency
June 18, 2025	Wet-weather unanticipated prohibited bypass discharge to waters of the U.S. - endangerment	ST6

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID IL0037818 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

This public-records page covers the Clean Water Act discharge permit NPDES IL0037818 for MINONK STP, CITY OF in Minonk, IL, held by MINONK, CITY OF, which discharges to Long Point Creek To Vermillion River within subwatershed HUC 071300020703. The permit is listed as administratively continued, with a minor discharger class, 11 pollutants under a numeric limit, and 6 pollutants with an effluent exceedance. The status and dates reflect EPA's permit file as loaded on October 14, 2026.