NPDES KY0004278 · Clean Water Act
CENTURY ALUMINUM OF KENTUCKY LLC - SEBREE, Robards, KY: NPDES KY0004278 discharge permit, effluent exceedances, inspections, penalties
CENTURY ALUMINUM OF KENTUCKY LLC - SEBREE, Robards, Kentucky: Individual permit KY0004278, held by Century Aluminum of Kentucky LLC - Sebree; Administratively continued; issued March 8, 2017, term to March 31, 2022; discharges to GREEN RIVER; Alumina Refining and Primary Aluminum Production.
6 of the 16 pollutants listed for NPDES KY0004278 have no violation or effluent exceedance.
- Solids, total suspended: 12 limits, 79 violations of any kind, 61 effluent exceedances, latest January 31, 2023, largest 500% over the limit.
- Iron, total recoverable: 1 limit, 12 violations of any kind, 10 effluent exceedances, latest January 31, 2023, largest 112% over the limit.
- pH: 12 limits, 17 violations of any kind, 9 effluent exceedances, latest May 31, 2026.
- Oil and grease: 0 limits, 7 violations of any kind, 5 effluent exceedances, latest May 31, 2016, largest 430% over the limit.
- Chlorine, total residual: 6 limits, 1 violation of any kind, 1 effluent exceedance, latest July 31, 2020, largest 64% over the limit.
- Hardness, total [as CaCO3]: 2 limits, 10 violations of any kind.
- Metals, total: 0 limits, 4 violations of any kind.
- Flow, in conduit or thru treatment plant: 12 limits, 2 violations of any kind.
- Thallium, total recoverable: 1 limit, 1 violation of any kind.
- Temperature, water deg. centigrade: 0 limits, 1 violation of any kind.
- Oil & Grease: 12 limits.
- Temperature, water deg. fahrenheit: 6 limits.
- Cadmium, total recoverable: 2 limits.
- Nickel, total recoverable: 1 limit.
- Zinc, total recoverable: 1 limit.
- Toxicity, final conc toxicity units: 1 limit.
- February 17, 2026: Evaluation (S).
CENTURY ALUMINUM OF KENTUCKY LLC - SEBREE among its neighbors
4 discharge permits are in the Groves Creek subwatershed (HUC 051100050401); KY0004278 is one. Its county: 52, 1 major; KY0004278 is major permit.
Other permits in the Groves Creek subwatershed (HUC 051100050401)
- BIG RIVERS ELECTRIC - REID GREEN, Robards: KY0001929, major, term to 2023-09-30
- SEBREE, CITY OF, Sebree: KYP000054, minor, term to 2017-05-31
- UNBRIDLED SOLAR PROJECT, Robards: KYR10T655, minor, term to 2029-12-31
Identity
| Facility | CENTURY ALUMINUM OF KENTUCKY LLC - SEBREE |
|---|---|
| Permittee | Century Aluminum of Kentucky LLC - Sebree |
| NPDES ID | KY0004278 |
| Status | Administratively continued |
| Type | Individual permit |
| Class | Major |
| Facility type | Non-POTW |
| Issued | March 8, 2017 |
| Expires | March 31, 2022 |
| Address | Robards, KY 42452 |
| Receiving water | GREEN RIVER |
| Subwatershed | Groves Creek (HUC 051100050401) |
| NAICS | 331313 – Alumina Refining and Primary Aluminum Production |
| SIC | 3334 – Primary Aluminum |
| Other EPA IDs (FRS) | RCRA handler KYD058692526; ICIS-AIR source KY0000002110100029 |
NPDES KY0004278: effluent limits and exceedances
CENTURY ALUMINUM OF KENTUCKY LLC - SEBREE (NPDES KY0004278): 16 pollutants on file, 13 limited; 10 with a violation of any kind, 5 with an exceedance.
| Pollutant | Limits | Violations | Exceedances | Latest | Largest, as filed |
|---|---|---|---|---|---|
| Solids, total suspended | 12 | 79 | 61 | January 31, 2023 | 500% over the limit |
| Iron, total recoverable | 1 | 12 | 10 | January 31, 2023 | 112% over the limit |
| pH | 12 | 17 | 9 | May 31, 2026 | |
| Oil and grease | 0 | 7 | 5 | May 31, 2016 | 430% over the limit |
| Chlorine, total residual | 6 | 1 | 1 | July 31, 2020 | 64% over the limit |
| Hardness, total [as CaCO3] | 2 | 10 | 0 | ||
| Metals, total | 0 | 4 | 0 | ||
| Flow, in conduit or thru treatment plant | 12 | 2 | 0 | ||
| Thallium, total recoverable | 1 | 1 | 0 | ||
| Temperature, water deg. centigrade | 0 | 1 | 0 | ||
| Oil & Grease | 12 | 0 | 0 | ||
| Temperature, water deg. fahrenheit | 6 | 0 | 0 | ||
| Cadmium, total recoverable | 2 | 0 | 0 | ||
| Nickel, total recoverable | 1 | 0 | 0 | ||
| Zinc, total recoverable | 1 | 0 | 0 | ||
| Toxicity, final conc toxicity units | 1 | 0 | 0 |
NPDES KY0004278: inspections, violations and enforcement
NPDES KY0004278: 1 inspection
| Date | What EPA recorded | Agency |
|---|---|---|
| February 17, 2026 | Evaluation | S |
NPDES KY0004278 (CENTURY ALUMINUM OF KENTUCKY LLC - SEBREE): no single-event violation, formal enforcement action and informal enforcement action on file.
Watch NPDES KY0004278
NPDES KY0004278: one email when its EPA record changes — $99/month.
Permits near NPDES KY0004278
NPDES KY0004278: 16 pollutant rows, 1 dated events; ICIS-NPDES download, loaded October 14, 2026.