Clean Water Act discharge permit · NPDES IL0033481

ILLINOIS AMERICAN WATER COMPANY - GRANITE CITY WWTP, Granite City, IL: NPDES IL0033481 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MajorDischarger class
35Pollutants under a numeric limit
5Pollutants with an effluent exceedance

ILLINOIS AMERICAN WATER COMPANY - GRANITE CITY WWTP, held by GRANITE CITY, CITY OF, holds NPDES permit IL0033481, which discharges to Chain Of Rocks Canal. EPA’s file records it issued May 1, 2015 and expiring April 30, 2020. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filed	ILLINOIS AMERICAN WATER COMPANY - GRANITE CITY WWTP
Permittee as filed	GRANITE CITY, CITY OF
NPDES ID	IL0033481
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Major discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	May 1, 2015
Expiration date	April 30, 2020
Address	Granite City, IL 62040
Receiving water	CHAIN OF ROCKS CANAL
Receiving water impaired	303(D) Listed
Subwatershed	Maline Creek-Mississippi River (HUC 071401010401)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

35Pollutants on file
35Under a numeric limit
32With 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
Coliform, fecal general	2	130	128	July 31, 2026	367,400% over the limit
Chlorine, total residual	3	20	18	June 30, 2026	189% over the limit
Solids, total suspended	6	10	8	April 30, 2025	200% over the limit
pH	4	7	1	January 31, 2024
Nitrogen, ammonia total [as N]	15	6	1	January 31, 2024	29% over the limit
Flow, total	1	9	0
Nitrogen, total [as N]	1	5	0
Iron, dissolved [as Fe]	2	3	0
Mercury, total [as Hg]	2	3	0
BOD, 5-day, 20 deg. C	2	2	0
Oil & Grease	2	2	0
Cyanide, weak acid, dissociable	2	2	0
Cyanide, total [as CN]	2	2	0
Fluoride, total [as F]	2	2	0
Arsenic, total [as As]	2	2	0
Barium, total [as Ba]	2	2	0
Beryllium, total [as Be]	2	2	0
Cadmium, total [as Cd]	2	2	0
Chromium, hexavalent [as Cr]	2	2	0
Chromium, total [as Cr]	2	2	0
Copper, total [as Cu]	2	2	0
Iron, total [as Fe]	2	2	0
Lead, total [as Pb]	2	2	0
Manganese, total [as Mn]	2	2	0
Thallium, total [as Tl]	2	2	0
Nickel, total [as Ni]	2	2	0
Silver, total [as Ag]	2	2	0
Zinc, total [as Zn]	2	2	0
Antimony, total [as Sb]	2	2	0
Selenium, total [as Se]	2	2	0
Phenolics, total recoverable	2	2	0
Phosphorus, total [as P]	1	1	0
Flow, in conduit or thru treatment plant	4	0	0
BOD, carbonaceous [5 day, 20 C]	4	0	0
Overflows	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

37Single-event violations

Date	What EPA recorded	Agency
August 6, 2026	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
July 10, 2026	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
June 21, 2026	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
June 8, 2026	Wet-weather CSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
June 8, 2026	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
May 6, 2026	Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environment	ST6
April 28, 2026	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
February 18, 2026	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
February 14, 2026	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
February 14, 2026	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
February 13, 2026	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
January 28, 2026	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
December 11, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
July 24, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
July 24, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
July 21, 2025	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
July 6, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
June 20, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
May 22, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
May 17, 2025	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
May 17, 2025	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
May 17, 2025	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
May 16, 2025	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
May 16, 2025	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
May 16, 2025	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
May 8, 2025	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
May 3, 2025	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
May 1, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
April 25, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
April 19, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
April 4, 2025	Wet-weather SSO discharge to waters of the U.S. that may endanger health or the environment	ST6
April 4, 2025	Wet-weather SSO discharge to waters of the U.S. that may endanger health or the environment	ST6
April 4, 2025	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
April 4, 2025	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
April 4, 2025	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
April 4, 2025	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
January 30, 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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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.