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Clean Water Act discharge permit · NPDES KY0104493

OHIO VALLEY ALUMINUM CO LLC, Shelbyville, KY: NPDES KY0104493 discharge permit, effluent exceedances, inspections, penalties

OHIO VALLEY ALUMINUM CO LLC, held by Matalco US Inc, holds NPDES permit KY0104493, which discharges to Ut / Clear Crk. EPA’s file records it issued September 10, 2018 and expiring October 31, 2023.

OHIO VALLEY ALUMINUM CO LLC, Shelbyville, Kentucky: Individual permit KY0104493, held by Matalco US Inc; Administratively continued (past its expiration date and still in force until reissued); issued September 10, 2018, term to October 31, 2023; discharges to UT / CLEAR CRK.

  • Temperature, water deg. fahrenheit: 2 limits, 58 violations of any kind, 43 effluent exceedances, latest September 30, 2012, largest 171% over the limit.
  • Chlorine, total residual: 0 limits, 22 violations of any kind, 20 effluent exceedances, latest December 31, 2003, largest 2,264% over the limit.
  • Lead, total recoverable: 8 limits, 47 violations of any kind, 19 effluent exceedances, latest March 31, 2021, largest 20,471% over the limit.
  • Zinc, total recoverable: 10 limits, 42 violations of any kind, 15 effluent exceedances, latest March 31, 2021, largest 16,550% over the limit.
  • Oil and grease: 0 limits, 45 violations of any kind, 13 effluent exceedances, latest December 31, 2017, largest 80% over the limit.
  • Solids, total suspended: 6 limits, 24 violations of any kind, 8 effluent exceedances, latest December 31, 2022, largest 237% over the limit.
  • Copper, total recoverable: 2 limits, 19 violations of any kind, 8 effluent exceedances, latest March 31, 2025, largest 614% over the limit.
  • pH: 4 limits, 40 violations of any kind, 4 effluent exceedances, latest September 30, 2008.
  • Ammonia nitrogen, total, [as N] 30 day: 0 limits, 14 violations of any kind, 2 effluent exceedances, latest December 31, 2013, largest 2,200% over the limit.
  • Oil & Grease: 6 limits, 1 violation of any kind, 1 effluent exceedance, latest March 31, 2019, largest 96% over the limit.
  • Flow, in conduit or thru treatment plant: 4 limits, 40 violations of any kind, 0 effluent exceedances.
  • Precipitation volume: 0 limits, 24 violations of any kind, 0 effluent exceedances.
  • Phosphorus, total [as P]: 0 limits, 20 violations of any kind, 0 effluent exceedances.
  • Nitrogen, ammonia total [as N]: 4 limits, 16 violations of any kind, 0 effluent exceedances.
  • Aluminum, total recoverable: 6 limits, 15 violations of any kind, 0 effluent exceedances.
  • Hardness, total [as CaCO3]: 4 limits, 13 violations of any kind, 0 effluent exceedances.
  • BOD, carbonaceous [5 day, 20 C]: 0 limits, 2 violations of any kind, 0 effluent exceedances.
  • May 9, 2024: Permit Violations - Violation Specified in Comment (ST6).
  • July 8, 2020: Management Practice Violations - Improper Operation and Maintenance (ST6).
  • July 8, 2020: Effluent Violations - Narrative Effluent Violation (ST6).
  • July 8, 2020: Permit Violations - Violation Specified in Comment (ST6).
  • May 18, 2017: Permit Violations - Violation Specified in Comment (ST6).
  • May 18, 2017: Management Practice Violations - Best Management Practice Deficiencies (ST6).

OHIO VALLEY ALUMINUM CO LLC among its neighbors

EPA’s permit file holds 50 discharge permits in the Lower Clear Creek subwatershed (HUC 051401020403), KY0104493 among them. Its county holds 139, 1 of them major permits; KY0104493 is a minor permit.

Other permits in the Lower Clear Creek subwatershed (HUC 051401020403)

Identity

Facility as filedOHIO VALLEY ALUMINUM CO LLC
Permittee as filedMatalco US Inc
NPDES IDKY0104493
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedSeptember 10, 2018
Expiration dateOctober 31, 2023
AddressShelbyville, KY 40065
Receiving waterUT / CLEAR CRK
SubwatershedLower Clear Creek (HUC 051401020403)
Other EPA IDs (FRS)ICIS-AIR source KY0000002121100001

Effluent limits and exceedances

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 measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Temperature, water deg. fahrenheit25843September 30, 2012171% over the limit
Chlorine, total residual02220December 31, 20032,264% over the limit
Lead, total recoverable84719March 31, 202120,471% over the limit
Zinc, total recoverable104215March 31, 202116,550% over the limit
Oil and grease04513December 31, 201780% over the limit
Solids, total suspended6248December 31, 2022237% over the limit
Copper, total recoverable2198March 31, 2025614% over the limit
pH4404September 30, 2008
Ammonia nitrogen, total, [as N] 30 day0142December 31, 20132,200% over the limit
Oil & Grease611March 31, 201996% over the limit
Flow, in conduit or thru treatment plant4400
Precipitation volume0240
Phosphorus, total [as P]0200
Nitrogen, ammonia total [as N]4160
Aluminum, total recoverable6150
Hardness, total [as CaCO3]4130
BOD, carbonaceous [5 day, 20 C]020

Inspections, violations and enforcement

DateWhat EPA recordedAgency
May 9, 2024Permit Violations - Violation Specified in CommentST6
July 8, 2020Management Practice Violations - Improper Operation and MaintenanceST6
July 8, 2020Effluent Violations - Narrative Effluent ViolationST6
July 8, 2020Permit Violations - Violation Specified in CommentST6
May 18, 2017Permit Violations - Violation Specified in CommentST6
May 18, 2017Management Practice Violations - Best Management Practice DeficienciesST6

Inspections

EPA’s inspection file holds no inspection for NPDES KY0104493.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES KY0104493.

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Nearby on the register

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

What this page shows

This public-records page covers NPDES permit KY0104493, held by OHIO VALLEY ALUMINUM CO LLC at Shelbyville, KY, which discharges to UT / CLEAR CRK in the Lower Clear Creek subwatershed (HUC 051401020403). The permit is listed as administratively continued, with a discharger class of Minor, 10 pollutants with an effluent exceedance, and 11 pollutants under a numeric limit.