Clean Water Act discharge permit · NPDES IL0029611
LOCKPORT STP, CITY OF, Lockport, IL: NPDES IL0029611 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 14Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
LOCKPORT STP, CITY OF, held by LOCKPORT, CITY OF, holds NPDES permit IL0029611, which discharges to Deep Run Ck-Chicago Ship-Des Plns R. EPA’s file records it issued August 5, 2011 and expiring August 31, 2016. 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 | LOCKPORT STP, CITY OF |
|---|---|
| Permittee as filed | LOCKPORT, CITY OF |
| NPDES ID | IL0029611 |
| 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 | August 5, 2011 |
| Expiration date | August 31, 2016 |
| Address | Lockport, IL 60441 |
| Receiving water | DEEP RUN CK-CHICAGO SHIP-DES PLNS R |
| Subwatershed | Maple Lake-Chicago Sanitary and Ship Canal (HUC 071200040705) |
| Program components on file | Biosolids, POTW, Pretreatment |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | RCRA handler ILD980677736 |
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
- 35Pollutants on file
- 14Under a numeric limit
- 34With 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] | 108 | 18 | 12 | December 31, 2002 | 53% over the limit |
| Solids, total suspended | 10 | 17 | 11 | May 31, 2022 | 527% over the limit |
| Coliform, fecal general | 3 | 17 | 9 | June 30, 2010 | 99,999% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 8 | 6 | 2 | December 31, 2010 | 216% over the limit |
| Chlorine, total residual | 3 | 5 | 2 | August 31, 2003 | 79% over the limit |
| Phosphorus, total [as P] | 4 | 3 | 1 | November 30, 2010 | 19% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 3 | 1 | October 31, 2001 | 33% over the limit |
| pH | 6 | 4 | 0 | ||
| Flow, in conduit or thru treatment plant | 6 | 4 | 0 | ||
| Silver, total [as Ag] | 0 | 4 | 0 | ||
| Copper, total [as Cu] | 4 | 2 | 0 | ||
| Zinc, total [as Zn] | 4 | 2 | 0 | ||
| Oil & Grease | 0 | 2 | 0 | ||
| Cyanide, total [as CN] | 0 | 2 | 0 | ||
| Cyanide, free [amenable to chlorination] | 0 | 2 | 0 | ||
| Fluoride, total [as F] | 0 | 2 | 0 | ||
| Arsenic, total [as As] | 0 | 2 | 0 | ||
| Barium, total [as Ba] | 0 | 2 | 0 | ||
| Beryllium, total [as Be] | 0 | 2 | 0 | ||
| Cadmium, total [as Cd] | 0 | 2 | 0 | ||
| Chromium, hexavalent [as Cr] | 0 | 2 | 0 | ||
| Chromium, total [as Cr] | 0 | 2 | 0 | ||
| Iron, total [as Fe] | 0 | 2 | 0 | ||
| Iron, dissolved [as Fe] | 0 | 2 | 0 | ||
| Lead, total [as Pb] | 0 | 2 | 0 | ||
| Manganese, total [as Mn] | 0 | 2 | 0 | ||
| Thallium, total [as Tl] | 0 | 2 | 0 | ||
| Nickel, total [as Ni] | 0 | 2 | 0 | ||
| Antimony, total [as Sb] | 0 | 2 | 0 | ||
| Selenium, total [as Se] | 0 | 2 | 0 | ||
| Phenolics, total recoverable | 0 | 2 | 0 | ||
| Mercury, total [as Hg] | 0 | 2 | 0 | ||
| Oxygen, dissolved [DO] | 10 | 1 | 0 | ||
| Flow, total | 1 | 1 | 0 | ||
| Nitrogen, total [as N] | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES IL0029611.
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 October 14, 2026.