Clean Water Act discharge permit · NPDES IL0078450
MARQUIS ENERGY LLC, Hennepin, IL: NPDES IL0078450 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 6Pollutants under a numeric limit
- 2Pollutants with an effluent exceedance
MARQUIS ENERGY LLC, held by MARQUIS ENERGY-ILLINOIS, LLC, holds NPDES permit IL0078450, which discharges to Illinois River. EPA’s file records it issued January 28, 2020 and expiring January 31, 2025. 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 | MARQUIS ENERGY LLC |
|---|---|
| Permittee as filed | MARQUIS ENERGY-ILLINOIS, LLC |
| NPDES ID | IL0078450 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | January 28, 2020 |
| Expiration date | January 31, 2025 |
| Address | Hennepin, IL 61327 |
| Receiving water | ILLINOIS RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Depue Lake-Illinois River (HUC 071300010804) |
| SIC | 2869 – Industrial Organic Chemicals |
| Other EPA IDs (FRS) | RCRA handler ILR000197368; ICIS-AIR source IL000155010AAJ |
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
- 28Pollutants on file
- 6Under a numeric limit
- 27With a violation of any kind
- 2With 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 |
|---|---|---|---|---|---|
| Chlorine, total residual | 1 | 23 | 11 | July 31, 2025 | 404% over the limit |
| Solids, total suspended | 2 | 31 | 9 | June 30, 2024 | 140% over the limit |
| pH | 2 | 24 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 23 | 0 | ||
| Iron, total [as Fe] | 0 | 23 | 0 | ||
| Chloride [as Cl] | 0 | 20 | 0 | ||
| Solids, total dissolved | 0 | 18 | 0 | ||
| Temperature, water deg. fahrenheit | 1 | 11 | 0 | ||
| Zinc, total [as Zn] | 0 | 9 | 0 | ||
| Oil & Grease | 0 | 2 | 0 | ||
| Cyanide, weak acid, dissociable | 0 | 2 | 0 | ||
| Cyanide, total [as CN] | 0 | 2 | 0 | ||
| Fluoride, total [as F] | 0 | 2 | 0 | ||
| Arsenic, total [as As] | 0 | 2 | 0 | ||
| Barium, total [as Ba] | 0 | 2 | 0 | ||
| Cadmium, total [as Cd] | 0 | 2 | 0 | ||
| Chromium, hexavalent [as Cr] | 0 | 2 | 0 | ||
| Chromium, total [as Cr] | 0 | 2 | 0 | ||
| Copper, total [as Cu] | 0 | 2 | 0 | ||
| Iron, dissolved [as Fe] | 0 | 2 | 0 | ||
| Lead, total [as Pb] | 0 | 2 | 0 | ||
| Manganese, total [as Mn] | 0 | 2 | 0 | ||
| Nickel, total [as Ni] | 0 | 2 | 0 | ||
| Silver, total [as Ag] | 0 | 2 | 0 | ||
| Selenium, total [as Se] | 0 | 2 | 0 | ||
| Phenolics, total recoverable | 0 | 2 | 0 | ||
| Mercury, total [as Hg] | 0 | 2 | 0 | ||
| Phosphorus, total [as P] | 1 | 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 IL0078450.
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
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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 IL0078450 there.
Nearby on the register
- Discharge permits in Hennepin
- Every permit record in Hennepin, A to Z
- Discharge permits in Illinois
- Every permit record in Illinois, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.