SENECA MINE COMPLEX

NPDES ID: CO0000221

D — SNC: Discharge monitoring report not received

The facility didn't submit its required discharge monitoring report.

This quarter: 16 reporting violations.

Violations

March 31, 2026

Solids, total dissolved

0% over limit

Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR AVG)

DMR, Monitor Only - Overdue

Solids, total dissolved

0% over limit

Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)

DMR, Monitor Only - Overdue

March 31, 2025

Solids, settleable

16% over limit

Discharged 0.00058 mg/L against a permitted limit of 0.0005 mg/L (DAILY MX)

DMR, Limited - Numeric Violation

First flagged

April 14, 2026 (4 months ago)

Last confirmed

August 17, 2026 (3 hours ago)