ARCONIC TENNESSEE LLC - NORTH PLANT
NPDES ID: TN0067199
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
Violations
December 31, 2025
Polychlorinated biphenyls [PCBs]
3600% over limit
Discharged 0.000037 mg/L against a permitted limit of 0.000001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Polychlorinated biphenyls [PCBs]
5186% over limit
Discharged 0.000037 mg/L against a permitted limit of 7e-7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2025
Polychlorinated biphenyls [PCBs]
3100% over limit
Discharged 0.000032 mg/L against a permitted limit of 0.000001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Polychlorinated biphenyls [PCBs]
4471% over limit
Discharged 0.000032 mg/L against a permitted limit of 7e-7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
Chromium, hexavalent [as Cr]
27% over limit
Discharged 0.019 mg/L against a permitted limit of 0.015 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)