Minnesota Power — NPDES permit ND0026361: limits, due date and EPA's record

NPDES permit ND0026361 · Minor NON-POTW · effective, expires 2030-03-31 · EPA's file as of 2026-09-19

Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

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

Reporting

Reports are due about 29 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (12)

Outfall	Parameter	Statistic	Limit	Months
002	Temperature, water deg. centigrade	WKLY AVG	report only	all year
002	Temperature, water deg. centigrade	MO AVG	report only	all year
002	Temperature, water deg. centigrade	DAILY MX	report only	all year
002	pH	MINIMUM	>= 6.5 SU	all year
002	pH	MAXIMUM	<= 9 SU	all year
002	Flow, in conduit or thru treatment plant	MO AVG	report only	all year
002	Flow, in conduit or thru treatment plant	DAILY MX	report only	all year
002	Chlorine, total residual	WKLY AVG	report only	all year
002	Chlorine, total residual	MO AVG	report only	all year
002	Chlorine, total residual	DAILY MX	report only	all year
002	Chlorine, total residual	MO AVG	<= .11 lb/d	all year
002	Chlorine, total residual	DAILY MX	<= .19 lb/d	all year