POET BIOREFINING — NPDES permit IA0078051: limits, due date and EPA's record

NPDES permit IA0078051 · Minor NON-POTW · effective, expires 2026-12-31 · EPA's file as of 2026-09-19

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

Last period with anything received: 2026-07-31. Most often over: Iron, total [as Fe] (4), Flow, in conduit or thru treatment plant (2), Chlorine, total residual (1).

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (18)

Outfall	Parameter	Statistic	Limit	Months
001	pH	DAILY MN	>= 6.5 SU	all year
001	pH	DAILY MX	<= 9 SU	all year
002	Oxygen, dissolved [DO]	DAILY MN	>= 5 mg/L	all year
002	pH	DAILY MN	>= 6.5 SU	all year
002	pH	DAILY MX	<= 9 SU	all year
002	Solids, total suspended	DAILY MX	<= 45 mg/L	all year
002	Iron, total [as Fe]	DAILY MX	<= 1 mg/L	all year
002	Zinc, total [as Zn]	DAILY MX	<= .1 mg/L	all year
002	Chlorine, total residual	DAILY MX	<= .019 mg/L	all year
003	pH	DAILY MN	>= 6.5 SU	all year
003	pH	DAILY MX	<= 9 SU	all year
003	Solids, total suspended	30DA AVG	<= 30 mg/L	all year
003	Solids, total suspended	DAILY MX	<= 45 mg/L	all year
003	Iron, total [as Fe]	30DA AVG	<= 1.01 mg/L	all year
003	Iron, total [as Fe]	DAILY MX	<= 1.01 mg/L	all year
003	Iron, total [as Fe]	30DA AVG	<= .54 lb/d	all year
003	Iron, total [as Fe]	DAILY MX	<= .54 lb/d	all year
003	Flow, in conduit or thru treatment plant	DAILY MX	<= .0225 MGD	all year