Velarion Records
Follow this permit Velarion Records emails you this permit’s record, cited to the public filing, and tells you when the register changes it. Free.
We’ll email you a link to confirm. The continuous daily watch on every change is the paid alert. Unsubscribe any time.
Also free: The Pay Desk, the weekly executive pay briefing.

Clean Water Act discharge permit · NPDES ILG870020

CONSTELLATION ENERGY GENERATION LLC - DRESDEN NUCLEAR GENERATING STATION, Morris, IL: NPDES ILG870020 discharge permit, effluent exceedances, inspections, penalties

CONSTELLATION ENERGY GENERATION LLC - DRESDEN NUCLEAR GENERATING STATION, held by EXELON GENERATION COMPANY DRESDEN STATION, holds NPDES permit ILG870020. 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 ENERGY GENERATION LLC - DRESDEN NUCLEAR GENERATING STATION: its NPDES ID, its permit type and status, its dates, its address in Morris, Illinois. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES ILG870020.

Identity

Facility as filedCONSTELLATION ENERGY GENERATION LLC - DRESDEN NUCLEAR GENERATING STATION
Permittee as filedEXELON GENERATION COMPANY DRESDEN STATION
NPDES IDILG870020
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedNovember 1, 2016
Expiration dateOctober 31, 2021
AddressMorris, IL 60450
Receiving water impaired303(D) Listed
SubwatershedKankakee River (HUC 071200011809)
Other EPA IDs (FRS)RCRA handler ILD000665489; ICIS-AIR source IL000063806AAC

Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES ILG870020.

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

EPA’s single-event violation file, as loaded, holds no violation for NPDES ILG870020.

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.

Watch this permit

One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, ILG870020.

Start the watch

How often?
  • One permit holder — $99/month
  • One watershed — $2,990/year
  • One state — $4,990/year
  • The whole register — $18,000/year

How we handle your data → Privacy

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 ILG870020 there.

Nearby on the register

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

What this page shows

Of the 20 general permit coverages in Grundy County, 15.0% have a violation on file. With this permit included, 20.0% of those 20 Grundy County coverages carry an earlier issue date than the permit held by CONSTELLATION ENERGY GENERATION LLC - DRESDEN NUCLEAR GENERATING STATION. The Kankakee River subwatershed holds 10 NPDES permits, with this permit among them.