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Clean Water Act discharge permit · NPDES ILG870120

SOUTHERN ILLINOIS POWER COOPERATIVE, Marion, IL: NPDES ILG870120 discharge permit, effluent exceedances, inspections, penalties

SOUTHERN ILLINOIS POWER COOPERATIVE holds NPDES permit ILG870120. 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 (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

What the register holds for SOUTHERN ILLINOIS POWER COOPERATIVE: its NPDES ID, its permit type and status, its dates, its address in Marion, Illinois. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES ILG870120.

Identity

Facility as filedSOUTHERN ILLINOIS POWER COOPERATIVE
Permittee as filedSOUTHERN ILLINOIS POWER COOPERATIVE
NPDES IDILG870120
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
AddressMarion, IL 62959
SubwatershedLittle Saline Creek-South Fork Saline River (HUC 051402040102)
Other EPA IDs (FRS)RCRA handler ILD007813900; ICIS-AIR source IL000199856AAC

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 ILG870120.

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 ILG870120.

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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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 ILG870120 there.

Nearby on the register

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

What this page shows

The Little Saline Creek-South Fork Saline River subwatershed holds 3 NPDES permits, including this permit. Williamson County has 4 general permit coverages on EPA's NPDES register, with this permit among them. SOUTHERN ILLINOIS POWER COOPERATIVE has 0 pollutants under a numeric limit and 0 pollutants with an effluent exceedance.