HAMPTON CORNERS MINE
NPDES ID: NY0245879
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.
This quarter: 3 effluent violations.
Violations
May 31, 2026
Nitrite + Nitrate total [as N]
67% over limit
Discharged 33.4 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Cyanide, free [amenable to chlorination]
40% over limit
Discharged 1.4 mg/L against a permitted limit of 1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrite + Nitrate total [as N]
12% over limit
Discharged 22.3 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrite + Nitrate total [as N]
90% over limit
Discharged 38 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrite + Nitrate total [as N]
123% over limit
Discharged 44.6 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia, total [as NH3]
33% over limit
Discharged 46.4 mg/L against a permitted limit of 35 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
78% over limit
Discharged 89 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
Cyanide, free [amenable to chlorination]
34% over limit
Discharged 1.34 mg/L against a permitted limit of 1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
Cyanide, free [amenable to chlorination]
64% over limit
Discharged 1.64 mg/L against a permitted limit of 1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2025
Oil & Grease
181% over limit
Discharged 42.1 mg/L against a permitted limit of 15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Cyanide, free [amenable to chlorination]
8% over limit
Discharged 1.08 mg/L against a permitted limit of 1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
Oil & Grease
32% over limit
Discharged 19.8 mg/L against a permitted limit of 15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrite + Nitrate total [as N]
30% over limit
Discharged 25.9 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2024
Oil & Grease
353% over limit
Discharged 68 mg/L against a permitted limit of 15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrite + Nitrate total [as N]
60% over limit
Discharged 32 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
4180% over limit
Discharged 2140 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2024
Nitrogen, ammonia, total [as NH3]
14% over limit
Discharged 40 mg/L against a permitted limit of 35 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
300% over limit
Discharged 200 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2024
BOD, 5-day, 20 deg. C
300% over limit
Discharged 200 mg/L against a permitted limit of 50 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
0% over limit
Discharged 108100 mg/L against a permitted limit of 0 mg/L (DAILY AV)
DMR, Monitor Only - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)