Clean Water Act discharge permit · NPDES IL0030031

MOUNT MORRIS STP, VILLAGE OF, Mount Morris, IL: NPDES IL0030031 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
11Pollutants under a numeric limit
7Pollutants with an effluent exceedance

MOUNT MORRIS STP, VILLAGE OF, held by MOUNT MORRIS, VILLAGE OF, holds NPDES permit IL0030031, which discharges to Mount Morris Creek North. EPA’s file records it issued March 24, 2021 and expiring March 31, 2026. 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	MOUNT MORRIS STP, VILLAGE OF
Permittee as filed	MOUNT MORRIS, VILLAGE OF
NPDES ID	IL0030031
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	March 24, 2021
Expiration date	March 31, 2026
Address	Mount Morris, IL 61054
Receiving water	MOUNT MORRIS CREEK NORTH
Receiving water impaired	303(D) Listed
Subwatershed	Coon Creek-Pine Creek (HUC 070900050502)
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
10With a violation of any kind
7With 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	141	136	June 30, 2013	250% over the limit
Nitrogen, ammonia total [as N]	12	42	34	September 30, 2016	183% over the limit
BOD, carbonaceous [5 day, 20 C]	4	27	23	August 31, 2010	133% over the limit
Chlorine, total residual	2	8	4	August 31, 2005	20% over the limit
Phosphorus, total [as P]	2	5	4	October 31, 2020	180% over the limit
Coliform, fecal general	1	5	3	October 31, 2010	2,900% over the limit
Oxygen, dissolved [DO]	5	2	1	December 31, 2008	23% over the limit
Flow, in conduit or thru treatment plant	4	6	0
pH	2	2	0
BOD, 5-day, 20 deg. C	1	1	0
Nitrogen, total [as N]	1	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

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES IL0030031.

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.

Watch this permit

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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 IL0030031 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 NPDES discharge permit IL0030031 held by Mount Morris, Village of, for the Mount Morris STP, a publicly owned treatment works discharging to Mount Morris Creek North. The page lists the permit as administratively continued, with 7 pollutants under a numeric limit and 7 pollutants with an effluent exceedance, and it is cited to EPA's ICIS-NPDES permit file as of October 14, 2026.