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Clean Water Act discharge permit · NPDES KY0099341

PLYMOUTH ENGINEERED SHAPES, Hopkinsville, KY: NPDES KY0099341 discharge permit, effluent exceedances, inspections, penalties

PLYMOUTH ENGINEERED SHAPES, held by Plymouth Engineered Shapes, holds NPDES permit KY0099341, which discharges to Ut / South Fork / Little River. EPA’s file records it issued July 29, 2025 and expiring September 30, 2030.

PLYMOUTH ENGINEERED SHAPES, Hopkinsville, Kentucky: Individual permit KY0099341, held by Plymouth Engineered Shapes; Effective; issued July 29, 2025, term to September 30, 2030; discharges to UT / SOUTH FORK / LITTLE RIVER; Nonferrous Metal [Except Copper and Aluminum] Rolling, Drawing, and Extruding.

  • Solids, total suspended: 8 limits, 103 violations of any kind, 21 effluent exceedances, latest March 31, 2025, largest 3,207% over the limit.
  • Zinc, total recoverable: 6 limits, 14 violations of any kind, 14 effluent exceedances, latest December 31, 2020, largest 634% over the limit.
  • Oil & Grease: 8 limits, 3 violations of any kind, 3 effluent exceedances, latest March 31, 2021, largest 91% over the limit.
  • pH: 8 limits, 88 violations of any kind, 2 effluent exceedances, latest March 31, 2017.
  • Oil and grease: 0 limits, 86 violations of any kind, 2 effluent exceedances, latest March 31, 2012, largest 381% over the limit.
  • Metals, total: 0 limits, 86 violations of any kind, 0 effluent exceedances.
  • Flow, in conduit or thru treatment plant: 8 limits, 84 violations of any kind, 0 effluent exceedances.
  • Hardness, total [as CaCO3]: 6 limits, 84 violations of any kind, 0 effluent exceedances.
  • Precipitation volume: 0 limits, 82 violations of any kind, 0 effluent exceedances.
  • July 23, 2026: Evaluation (S).
  • June 12, 2025: Management Practice Violations - Improper Operation and Maintenance (ST6).
  • June 12, 2025: Permit Violations - Violation Specified in Comment (ST6).
  • June 1, 2021: Permit Violations - Violation Specified in Comment (ST6).
  • February 4, 2020: Permit Violations - Violation Specified in Comment (ST6).
  • September 11, 2017: Permit Violations - Violation Specified in Comment (ST6).
  • September 11, 2017: Management Practice Violations - Improper Operation and Maintenance (ST6).

PLYMOUTH ENGINEERED SHAPES among its neighbors

EPA’s permit file holds 11 discharge permits in the Lower South Fork Little River subwatershed (HUC 051302050502), KY0099341 among them. Its county holds 66, 1 of them major permits; KY0099341 is a minor permit.

Other permits in the Lower South Fork Little River subwatershed (HUC 051302050502)

Identity

Facility as filedPLYMOUTH ENGINEERED SHAPES
Permittee as filedPlymouth Engineered Shapes
NPDES IDKY0099341
Permit statusEffective
Permit typeIndividual permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedJuly 29, 2025
Expiration dateSeptember 30, 2030
AddressHopkinsville, KY 42240
Receiving waterUT / SOUTH FORK / LITTLE RIVER
SubwatershedLower South Fork Little River (HUC 051302050502)
NAICS331491 – Nonferrous Metal [Except Copper and Aluminum] Rolling, Drawing, and Extruding
SIC3356 – Nonferrous Rolling And Drawing
Other EPA IDs (FRS)RCRA handler KYD084270461

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
Solids, total suspended810321March 31, 20253,207% over the limit
Zinc, total recoverable61414December 31, 2020634% over the limit
Oil & Grease833March 31, 202191% over the limit
pH8882March 31, 2017
Oil and grease0862March 31, 2012381% over the limit
Metals, total0860
Flow, in conduit or thru treatment plant8840
Hardness, total [as CaCO3]6840
Precipitation volume0820

Inspections, violations and enforcement

DateWhat EPA recordedAgency
June 12, 2025Management Practice Violations - Improper Operation and MaintenanceST6
June 12, 2025Permit Violations - Violation Specified in CommentST6
June 1, 2021Permit Violations - Violation Specified in CommentST6
February 4, 2020Permit Violations - Violation Specified in CommentST6
September 11, 2017Permit Violations - Violation Specified in CommentST6
September 11, 2017Management Practice Violations - Improper Operation and MaintenanceST6

Inspections

DateWhat EPA recordedAgency
July 23, 2026EvaluationS

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 KY0099341.

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Nearby on the register

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

What this page shows

This public-records page covers Clean Water Act discharge permit NPDES KY0099341 for Plymouth Engineered Shapes in Hopkinsville, KY, which is listed as Effective, a Minor discharger class, and discharging to UT / SOUTH FORK / LITTLE RIVER in the Lower South Fork Little River subwatershed (HUC 051302050502). The page lists 6 pollutants under a numeric limit and 5 pollutants with an effluent exceedance, with the permit issued July 29, 2025 and expiring September 30, 2030.