IONIA WWTP
NPDES ID: MI0021041
T — SNC: Compliance schedule reporting violation
The facility was more than 30 days late reporting progress on its compliance schedule.
This quarter: 1 effluent violation, 1 permit schedule violation, 6 reporting violations.
Violations
April 30, 2026
Perfluorooctanesulfonate
0% over limit
Discharged 0.00007264 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Perfluorooctanesulfonate
0% over limit
Discharged 0.00007264 kg/d against a permitted limit of 0 kg/d (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00002361 kg/d against a permitted limit of 0 kg/d (DAILY MX)
DMR, Monitor Only - Overdue
Solids, suspended percent removal
27% over limit
Discharged 81 % against a permitted limit of 85 % (MINIMUM)
DMR, Limited - Numeric Violation
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00002361 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
March 31, 2026
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00000999 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00000999 kg/d against a permitted limit of 0 kg/d (DAILY MX)
DMR, Monitor Only - Overdue
February 28, 2026
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00000999 kg/d against a permitted limit of 0 kg/d (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00000999 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
January 31, 2026
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00000953 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00000953 kg/d against a permitted limit of 0 kg/d (DAILY MX)
DMR, Monitor Only - Overdue
December 31, 2025
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00000999 kg/d against a permitted limit of 0 kg/d (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00000999 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
November 30, 2025
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00000817 kg/d against a permitted limit of 0 kg/d (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00000817 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
October 31, 2025
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00000999 kg/d against a permitted limit of 0 kg/d (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.0000016 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.0000016 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00000999 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
September 30, 2025
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00003677 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00003677 kg/d against a permitted limit of 0 kg/d (DAILY MX)
DMR, Monitor Only - Overdue
August 31, 2025
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00001816 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00001816 kg/d against a permitted limit of 0 kg/d (DAILY MX)
DMR, Monitor Only - Overdue
July 31, 2025
Mercury, total [as Hg]
8% over limit
Discharged 0.00000215 mg/L against a permitted limit of 0.000002 mg/L (12MO AVG)
DMR, Limited - Numeric Violation
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00001725 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00001725 kg/d against a permitted limit of 0 kg/d (DAILY MX)
DMR, Monitor Only - Overdue
June 30, 2025
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00001907 kg/d against a permitted limit of 0 kg/d (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00001907 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
May 31, 2025
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.0000109 kg/d against a permitted limit of 0 kg/d (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.0000109 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
April 30, 2025
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00001317 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00001317 kg/d against a permitted limit of 0 kg/d (DAILY MX)
DMR, Monitor Only - Overdue
March 31, 2025
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00003042 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00003042 kg/d against a permitted limit of 0 kg/d (DAILY MX)
DMR, Monitor Only - Overdue
February 28, 2025
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00001317 kg/d against a permitted limit of 0 kg/d (DAILY MX)
DMR, Monitor Only - Overdue
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00001317 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
January 31, 2025
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00001453 kg/d against a permitted limit of 0 kg/d (MO AVG)
DMR, Monitor Only - Overdue
Perfluorooctanoic acid (PFOA)
0% over limit
Discharged 0.00001453 kg/d against a permitted limit of 0 kg/d (DAILY MX)
DMR, Monitor Only - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)