Clean Water Act discharge permit · NPDES IL0029335

CENTRALIA - KASKASKIA COLLEGE STP, Centralia, IL: NPDES IL0029335 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
10Pollutants under a numeric limit
5Pollutants with an effluent exceedance

CENTRALIA - KASKASKIA COLLEGE STP, held by CENTRALIA, CITY OF, holds NPDES permit IL0029335, which discharges to Prairie Creek. EPA’s file records it issued May 25, 2018 and expiring May 31, 2023. 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	CENTRALIA - KASKASKIA COLLEGE STP
Permittee as filed	CENTRALIA, CITY OF
NPDES ID	IL0029335
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	May 25, 2018
Expiration date	May 31, 2023
Address	Centralia, IL 62801
Receiving water	PRAIRIE CREEK
Receiving water impaired	303(D) Listed
Subwatershed	Crileys Branch-Crooked Creek (HUC 071402020807)
SIC	8221 – Colleges And Universities

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

10Pollutants on file
10Under a numeric limit
9With a violation of any kind
5With 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
Nitrogen, ammonia total [as N]	50	50	8	August 31, 2022	145% over the limit
Oxygen, dissolved [DO]	5	7	3	March 31, 2009	33% over the limit
Solids, total suspended	5	24	2	September 30, 2008	20% over the limit
pH	2	6	2	October 31, 2018
BOD, carbonaceous [5 day, 20 C]	4	19	1	January 31, 2003	12% over the limit
Flow, in conduit or thru treatment plant	4	24	0
Phosphorus, total [as P]	2	6	0
Chlorine, total residual	1	4	0
Coliform, fecal general	1	2	0
BOD, 5-day, 20 deg. C	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 IL0029335.

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

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, IL0029335.

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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 IL0029335 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 IL0029335 for the Centralia - Kaskaskia College STP in Centralia, IL, held by Centralia, City of, which discharges to Prairie Creek. The page lists a permit status of administratively continued, a minor discharger class, and figures of 10 pollutants under a numeric limit and 5 pollutants with an effluent exceedance.