Clean Water Act discharge permit · NPDES ILG580094

MAQUON STW, Maquon, IL: NPDES ILG580094 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
9Pollutants under a numeric limit
4Pollutants with an effluent exceedance

MAQUON STW, held by MAQUON, VILLAGE OF, holds NPDES permit ILG580094, which discharges to Spoon River. EPA’s file records it issued April 30, 2014 and expiring June 30, 2018. 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	MAQUON STW
Permittee as filed	MAQUON, VILLAGE OF
NPDES ID	ILG580094
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	April 30, 2014
Expiration date	June 30, 2018
Address	Maquon, IL 61468
Receiving water	SPOON RIVER
Subwatershed	Hickory Creek-Spoon River (HUC 071300051004)
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

9Pollutants on file
9Under a numeric limit
9With a violation of any kind
4With 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
Solids, total suspended	5	287	277	May 31, 2026	814% over the limit
BOD, carbonaceous [5 day, 20 C]	4	185	177	May 31, 2023	500% over the limit
Oxygen, dissolved [DO]	1	67	64	July 31, 2026	99,999% over the limit
pH	2	31	27	April 30, 2022
Chlorine, total residual	1	25	0
Flow, in conduit or thru treatment plant	4	6	0
Nitrogen, ammonia total [as N]	1	3	0
BOD, 5-day, 20 deg. C	1	2	0
Coliform, fecal general	1	2	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

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES ILG580094.

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 ILG580094 there.

Nearby on the register

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

This public-records page covers NPDES permit ILG580094 for MAQUON STW in Maquon, IL, held by MAQUON, VILLAGE OF, which discharges to SPOON RIVER within the Hickory Creek-Spoon River watershed (HUC 071300051004). The permit is listed as administratively continued, with 9 pollutants on file, 9 of them under a numeric limit, 4 with an effluent exceedance, and a discharger class of minor.