Clean Water Act discharge permit · NPDES IL0035084

CASEY - NORTHEAST STP, CITY OF, Casey, IL: NPDES IL0035084 discharge permit, effluent exceedances, inspections, penalties

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

CASEY - NORTHEAST STP, CITY OF, held by CASEY, CITY OF, holds NPDES permit IL0035084, which discharges to Unnamed Trib Of Quarry Branch Creek. EPA’s file records it issued October 7, 2020 and expiring October 31, 2025. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	CASEY - NORTHEAST STP, CITY OF
Permittee as filed	CASEY, CITY OF
NPDES ID	IL0035084
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	October 7, 2020
Expiration date	October 31, 2025
Address	Casey, IL 62420
Receiving water	UNNAMED TRIB OF QUARRY BRANCH CREEK
Subwatershed	Quarry Branch (HUC 051201121003)

Cited to the EPA ICIS-NPDES permit file (ECHO 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
Nitrogen, ammonia total [as N]	36	262	112	June 30, 2014	99,999% over the limit
Chlorine, total residual	4	132	79	July 31, 2017	119,900% over the limit
Solids, total suspended	11	211	48	May 31, 2018	250% over the limit
Coliform, fecal general	4	74	35	June 30, 2001	99,999% over the limit
BOD, carbonaceous [5 day, 20 C]	8	147	19	August 31, 2016	81% over the limit
pH	8	114	6	April 30, 2026
Oxygen, dissolved [DO]	5	9	6	August 31, 2018	67% over the limit
Flow, in conduit or thru treatment plant	6	92	0
BOD, 5-day, 20 deg. C	3	36	0
Flow, total	2	21	0
Overflows	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

2Single-event violations

Date	What EPA recorded	Agency
April 28, 2026	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
February 15, 2026	Wet-weather SSO discharge to waters of the U.S. that may endanger health or the environment	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.

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 IL0035084 there.

Nearby on the register

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