Clean Water Act discharge permit · NPDES IL0034479

HANOVER PARK STP #1, VLLAGE OF, Hanover Park, IL: NPDES IL0034479 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MajorDischarger class
39Pollutants under a numeric limit
2Pollutants with an effluent exceedance

HANOVER PARK STP #1, VLLAGE OF, held by HANOVER PARK, VILLAGE OF, holds NPDES permit IL0034479, which discharges to West Branch Of The Dupage River. EPA’s file records it issued September 24, 2015 and expiring September 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	HANOVER PARK STP #1, VLLAGE OF
Permittee as filed	HANOVER PARK, VILLAGE OF
NPDES ID	IL0034479
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	September 24, 2015
Expiration date	September 30, 2020
Address	Hanover Park, IL 60133
Receiving water	WEST BRANCH OF THE DUPAGE RIVER
Receiving water impaired	303(D) Listed
Subwatershed	Upper West Branch Du Page River (HUC 071200040801)

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

Effluent limits and exceedances

39Pollutants on file
39Under a numeric limit
10With a violation of any kind
2With 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
Oxygen, dissolved [DO]	16	24	4	July 31, 2013	5% over the limit
Nitrogen, ammonia total [as N]	33	7	3	August 31, 2023	134% over the limit
BOD, carbonaceous [5 day, 20 C]	8	12	0
Solids, total suspended	14	6	0
pH	8	4	0
Flow, in conduit or thru treatment plant	6	4	0
Chlorine, total residual	4	3	0
Coliform, fecal general	3	3	0
BOD, 5-day, 20 deg. C	6	2	0
Flow, total	3	1	0
Zinc, total [as Zn]	18	0	0
Phosphorus, total [as P]	6	0	0
Temperature, water deg. fahrenheit	2	0	0
Specific conductance	2	0	0
Alkalinity, total [as CaCO3]	2	0	0
Oil & Grease	2	0	0
Nitrogen, Kjeldahl, total [as N]	2	0	0
Nitrite + Nitrate total [as N]	2	0	0
Phosphorus, dissolved	2	0	0
Cyanide, weak acid, dissociable	2	0	0
Cyanide, total [as CN]	2	0	0
Chloride [as Cl]	2	0	0
Fluoride, total [as F]	2	0	0
Arsenic, total [as As]	2	0	0
Barium, total [as Ba]	2	0	0
Cadmium, total [as Cd]	2	0	0
Chromium, hexavalent [as Cr]	2	0	0
Chromium, total [as Cr]	2	0	0
Copper, total [as Cu]	2	0	0
Iron, total [as Fe]	2	0	0
Iron, dissolved [as Fe]	2	0	0
Lead, total [as Pb]	2	0	0
Manganese, total [as Mn]	2	0	0
Nickel, total [as Ni]	2	0	0
Silver, total [as Ag]	2	0	0
Selenium, total [as Se]	2	0	0
Phenolics, total recoverable	2	0	0
Mercury, total [as Hg]	2	0	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

8Single-event violations

Date	What EPA recorded	Agency
January 8, 2026	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
December 29, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
June 26, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
May 21, 2025	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
April 2, 2025	Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
December 31, 2024	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
December 18, 2024	Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment	ST6
November 18, 2024	Dry-weather SSO, no 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.

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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 IL0034479 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.