POET BIOREFINING - ASHTON, LLC
NPDES ID: IA0078051
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
Violations
February 28, 2026
Flow, in conduit or thru treatment plant
270% over limit
Discharged 0.08315 MGD against a permitted limit of 0.0225 MGD (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
Iron, total [as Fe]
52% over limit
Discharged 0.37318346 kg/d against a permitted limit of 0.24516 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Iron, total [as Fe]
52% over limit
Discharged 0.37318346 kg/d against a permitted limit of 0.24516 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Iron, total [as Fe]
118% over limit
Discharged 0.53550752 kg/d against a permitted limit of 0.24516 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
Iron, total [as Fe]
118% over limit
Discharged 0.53550752 kg/d against a permitted limit of 0.24516 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2025
Chlorine, total residual
5% over limit
Discharged 0.02 mg/L against a permitted limit of 0.019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
10% over limit
Discharged 0.11 mg/L against a permitted limit of 0.1 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
Flow, in conduit or thru treatment plant
51% over limit
Discharged 0.0339 MGD against a permitted limit of 0.0225 MGD (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)