HOUNDSHELL MINE
NPDES ID: VAM089037
X — SNC: Effluent violation (non-monthly average limit)
The facility discharged more of a pollutant than its permit allows, measured over a period other than a monthly average.
Violations
February 28, 2026
Manganese, total [as Mn]
15% over limit
Discharged 2.3 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Manganese, total [as Mn]
53% over limit
Discharged 6.1 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2025
Manganese, total [as Mn]
20% over limit
Discharged 4.8 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Manganese, total [as Mn]
20% over limit
Discharged 2.4 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Manganese, total [as Mn]
65% over limit
Discharged 3.3 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Manganese, total [as Mn]
65% over limit
Discharged 6.6 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
Manganese, total [as Mn]
15% over limit
Discharged 4.6 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Manganese, total [as Mn]
18% over limit
Discharged 2.35 mg/L against a permitted limit of 2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)