Minnesota Power

NPDES permit MN0046256 · Minor NON-POTW · administratively continued, expires 2023-08-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

This permit expired on 2023-08-31 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
0of 4 forms filed late

Last period with anything received: 2026-06-30.

Reporting

Reports are due about 21 days after each monitoring period ends (the most common figure among MN permits in EPA's filings — check your permit).

Limits in force (9)

OutfallParameterStatisticLimitMonths
D001pHINST MIN >= 6 SU all year
D001pHINST MAX <= 9 SU all year
D001Nitrogen, total [as N]ANNL AVG report only all year
D001Nitrogen, Kjeldahl, total [as N]ANNL AVG report only all year
D001Nitrite + Nitrate total [as N]ANNL AVG report only all year
D001Zinc, total [as Zn]QRTR AVG <= .388 mg/L all year
D001Flow, in conduit or thru treatment plantQRTR AVG report only all year
D001Flow, in conduit or thru treatment plantQT report only all year
D001Duration of dischargeQT report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states