Clean Water Act discharge permit · NPDES ILG870024
CONSTELLATION GENERATION COMPANY, LLC - LA SALLE COUNTY GENERATING STATION, Marseilles, IL: NPDES ILG870024 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
CONSTELLATION GENERATION COMPANY, LLC - LA SALLE COUNTY GENERATING STATION, held by EXELON GENERATION COMPANY LLC, holds NPDES permit ILG870024. EPA’s file records it issued November 1, 2016 and expiring October 31, 2021. 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.
What the register holds for CONSTELLATION GENERATION COMPANY, LLC - LA SALLE COUNTY GENERATING STATION: its NPDES ID, its permit type and status, its dates, its address in Marseilles, Illinois. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES ILG870024.
Identity
| Facility as filed | CONSTELLATION GENERATION COMPANY, LLC - LA SALLE COUNTY GENERATING STATION |
|---|---|
| Permittee as filed | EXELON GENERATION COMPANY LLC |
| NPDES ID | ILG870024 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | November 1, 2016 |
| Expiration date | October 31, 2021 |
| Address | Marseilles, IL 61341 |
| Subwatershed | South Kickapoo Creek-Illinois River (HUC 071200050802) |
| Other EPA IDs (FRS) | RCRA handler ILD000803643; ICIS-AIR source IL000099802AAA |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 0Pollutants on file
- 0Under a numeric limit
- 0With a violation of any kind
- 0With an effluent exceedance
EPA’s limits and effluent violation files hold no pollutant row for NPDES ILG870024.
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 ILG870024.
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 ILG870024 there.
Nearby on the register
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- Every permit record in Illinois, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.