Clean Water Act discharge permit · NPDES IA0080063

POET BIOREFINING - CORNING, Corning, IA: NPDES IA0080063 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
5Pollutants under a numeric limit
5Pollutants with an effluent exceedance
0Inspections on file
0Formal enforcement actions

POET BIOREFINING - CORNING holds NPDES permit IA0080063. EPA’s file records it issued August 1, 2024 and expiring July 31, 2029.

POET BIOREFINING - CORNING, Corning, Iowa: Individual permit IA0080063; Effective; issued August 1, 2024, term to July 31, 2029, by STA.

Iron, total [as Fe]: 4 limits, 39 violations of any kind, 31 effluent exceedances, latest April 30, 2024, largest 144% over the limit.
Chlorine, total residual: 4 limits, 32 violations of any kind, 26 effluent exceedances, latest December 31, 2022, largest 21,757% over the limit.
Solids, total suspended: 4 limits, 35 violations of any kind, 13 effluent exceedances, latest March 31, 2026, largest 231% over the limit.
Nitrogen, ammonia total [as N]: 68 limits, 6 violations of any kind, 6 effluent exceedances, latest July 31, 2026, largest 248% over the limit.
pH: 2 limits, 3 violations of any kind, 1 effluent exceedance, latest September 30, 2021.

POET BIOREFINING - CORNING among its neighbors

EPA’s permit file holds 3 discharge permits in the Lake Binder-East Nodaway River subwatershed (HUC 102400100107), IA0080063 among them. Its county holds 5, 0 of them major permits; IA0080063 is a minor permit.

Other permits in the Lake Binder-East Nodaway River subwatershed (HUC 102400100107)

CORNING CITY OF STP, Corning: IA0027375, minor permit, permit term to July 31, 2027
CORNING MUNICIPAL UTILITIES WATER TREATMENT PLANT, Corning: IA0076759, minor permit, permit term to December 31, 2023

Identity

Facility as filed	POET BIOREFINING - CORNING
Permittee as filed	POET BIOREFINING - CORNING
NPDES ID	IA0080063
Permit status	Effective
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	August 1, 2024
Expiration date	July 31, 2029
Issuing agency	STA
Address	Corning, IA 50841
Subwatershed	Lake Binder-East Nodaway River (HUC 102400100107)
Other EPA IDs (FRS)	RCRA handler IAR000516039; ICIS-AIR source IA0000001900300028

Effluent limits and exceedances

5Pollutants on file
5Under a numeric limit
5With a violation of any kind
5With an effluent exceedance

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Iron, total [as Fe]	4	39	31	April 30, 2024	144% over the limit
Chlorine, total residual	4	32	26	December 31, 2022	21,757% over the limit
Solids, total suspended	4	35	13	March 31, 2026	231% over the limit
Nitrogen, ammonia total [as N]	68	6	6	July 31, 2026	248% over the limit
pH	2	3	1	September 30, 2021

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES IA0080063.

Inspections

EPA’s inspection file holds no inspection for NPDES IA0080063.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES IA0080063.

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Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

This public-records page covers NPDES discharge permit IA0080063 for POET BIOREFINING - CORNING in Corning, IA, an individual minor discharger permit listed as effective, issued August 1, 2024, and expiring July 31, 2029. The page lists 5 pollutants on file, 5 under a numeric limit, and 5 with an effluent exceedance.