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Clean Water Act discharge permit · NPDES IL0020354

ANTIOCH STP, VILLAGE OF, Antioch, IL: NPDES IL0020354 discharge permit, effluent exceedances, inspections, penalties

ANTIOCH STP, VILLAGE OF, held by ANTIOCH, VILLAGE OF, holds NPDES permit IL0020354, which discharges to Sequoit Creek-Fox River-Il River. EPA’s file records it issued December 19, 2014 and expiring December 31, 2019. 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 filedANTIOCH STP, VILLAGE OF
Permittee as filedANTIOCH, VILLAGE OF
NPDES IDIL0020354
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMajor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedDecember 19, 2014
Expiration dateDecember 31, 2019
AddressAntioch, IL 60002
Receiving waterSEQUOIT CREEK-FOX RIVER-IL RIVER
SubwatershedSequoit Creek (HUC 071200061004)
Program components on fileBiosolids, POTW, Pretreatment
SIC4952 – Sewerage Systems
Other EPA IDs (FRS)RCRA handler ILT180014649

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

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 measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Copper, total [as Cu]63127December 31, 2012336% over the limit
Phosphorus, total [as P]62921June 30, 2020163% over the limit
Nitrogen, ammonia total [as N]161814December 31, 2009421% over the limit
Solids, total suspended72313October 31, 2009154% over the limit
Coliform, fecal general163August 31, 202399,999% over the limit
Silver, total [as Ag]233May 31, 2011147% over the limit
BOD, 5-day, 20 deg. C142December 31, 200825% over the limit
pH251February 28, 2003
Oxygen, dissolved [DO]511April 30, 200812% over the limit
Chlorine, total residual1730
BOD, carbonaceous [5 day, 20 C]680
Flow, in conduit or thru treatment plant440
Flow, total010
Oil & Grease200
Nitrogen, total [as N]200
Cyanide, weak acid, dissociable200
Cyanide, total [as CN]200
Fluoride, total [as F]200
Arsenic, total [as As]200
Barium, total [as Ba]200
Beryllium, total [as Be]200
Cadmium, total [as Cd]200
Chromium, hexavalent [as Cr]200
Chromium, total [as Cr]200
Iron, total [as Fe]200
Iron, dissolved [as Fe]200
Lead, total [as Pb]200
Manganese, total [as Mn]200
Thallium, total [as Tl]200
Nickel, total [as Ni]200
Zinc, total [as Zn]200
Antimony, total [as Sb]200
Selenium, total [as Se]200
Phenolics, total recoverable200
Mercury, total [as Hg]200
Temperature, water deg. fahrenheit100
Alkalinity, total [as CaCO3]100
Nitrogen, Kjeldahl, total [as N]100
Nitrite + Nitrate total [as N]100
Phosphorus, dissolved100

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

DateWhat EPA recordedAgency
April 30, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
April 5, 2026Dry-weather SSO discharge to waters of the U.S. that may endanger health or the environmentST6
March 21, 2026Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
November 22, 2025Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
September 20, 2025Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
February 1, 2025Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
January 1, 2025Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
December 4, 2024Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6
November 13, 2024Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environmentST6

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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Nearby on the register

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

What this page shows

This public-records page covers Clean Water Act discharge permit NPDES IL0020354 for ANTIOCH STP, VILLAGE OF in Antioch, IL, a major discharger classed as a publicly owned treatment works with program components for Biosolids, POTW, and Pretreatment. The page lists 39 for discharger class, 9 pollutants under a numeric limit, and 9 pollutants with an effluent exceedance, and it shows the permit as administratively continued, with an issue date of December 19, 2014 and an expiration date of December 31, 2019.