INTERIOR TWP WWSL
NPDES ID: MIG580218
T — SNC: Compliance schedule reporting violation
The facility was more than 30 days late reporting progress on its compliance schedule.
This quarter: 1 effluent violation, 1 single-event violation, 7 permit schedule violations.
Violations
May 31, 2026
Oxygen, dissolved [DO]
28% over limit
Discharged 3.6 mg/L against a permitted limit of 5 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
October 31, 2025
Solids, total suspended
13% over limit
Discharged 45 mg/L against a permitted limit of 40 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
BOD, 5-day, 20 deg. C
10% over limit
Discharged 33 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2024
BOD, 5-day, 20 deg. C
2% over limit
Discharged 30.5 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Potassium, sludge, total, dry weight [as K]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO MIN)
DMR, Monitor Only - Overdue
Nitrogen, sludge, total, dry weight [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
First flagged
April 14, 2026 (5 months ago)
Last confirmed
September 15, 2026 (4 days ago)