NEW HORIZON MINE
NPDES ID: CO0000213
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
This quarter: 1 effluent violation.
Violations
September 30, 2025
Static Renewal 7 Day Chronic Ceriodaphnia dubia
76% over limit
Discharged 24.4 toxic against a permitted limit of 100 toxic (MN VALUE)
DMR, Limited - Numeric Violation
June 30, 2025
Static Renewal 7 Day Chronic Ceriodaphnia dubia
56% over limit
Discharged 43.6 toxic against a permitted limit of 100 toxic (MN VALUE)
DMR, Limited - Numeric Violation
September 30, 2024
Static Renewal 7 Day Chronic Ceriodaphnia dubia
70% over limit
Discharged 30 toxic against a permitted limit of 100 toxic (MN VALUE)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (5 days ago)