Clean Water Act discharge permit · NPDES MI0021041
IONIA WWTP, Ionia, MI: NPDES MI0021041 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 28Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
IONIA WWTP, held by Ionia Regional Utilities Authority, holds NPDES permit MI0021041, which discharges to Grand River. EPA’s file records it issued July 29, 2016 and expiring October 1, 2020. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | IONIA WWTP |
|---|---|
| Permittee as filed | Ionia Regional Utilities Authority |
| NPDES ID | MI0021041 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | July 29, 2016 |
| Expiration date | October 1, 2020 |
| Issuing agency | State |
| Address | Ionia, MI 48846 |
| Receiving water | Grand River |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Bellemy Creek-Grand River (HUC 040500060309) |
| Program components on file | Biosolids, POTW |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 29Pollutants on file
- 28Under a numeric limit
- 15With a violation of any kind
- 9With 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 |
|---|---|---|---|---|---|
| Coliform, fecal general | 2 | 16 | 6 | May 31, 2015 | 1,208% over the limit |
| Cyanide [A] | 2 | 3 | 3 | July 31, 2018 | 33% over the limit |
| Solids, suspended percent removal | 2 | 7 | 2 | April 30, 2026 | 27% over the limit |
| Chlorine, total residual | 1 | 7 | 2 | April 30, 2023 | 689% over the limit |
| Solids, total suspended | 4 | 21 | 1 | May 31, 2020 | 8% over the limit |
| Phosphorus, total [as P] | 4 | 11 | 1 | May 31, 2007 | 100% over the limit |
| Mercury, total [as Hg] | 6 | 9 | 1 | July 31, 2025 | 8% over the limit |
| Oxygen, dissolved [DO] | 2 | 6 | 1 | July 31, 2003 | 26% over the limit |
| Copper, total [as Cu] | 2 | 1 | 1 | January 31, 2021 | 244% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 12 | 20 | 0 | ||
| pH | 2 | 11 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 11 | 0 | ||
| Nitrogen, ammonia total [as N] | 8 | 10 | 0 | ||
| BOD, carb-5 day, 20 deg C, percent removal | 2 | 5 | 0 | ||
| Toxicity, final conc toxicity units | 0 | 2 | 0 | ||
| Solids, total | 3 | 0 | 0 | ||
| Arsenic, dry weight | 3 | 0 | 0 | ||
| Selenium, dry weight | 3 | 0 | 0 | ||
| Copper, dry weight | 3 | 0 | 0 | ||
| Cadmium, dry weight | 3 | 0 | 0 | ||
| Nitrogen, total Kjeldahl | 3 | 0 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 0 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 0 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 0 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 0 | 0 | ||
| Nitrogen, sludge, total, dry weight [as N] | 3 | 0 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 0 | 0 | ||
| Potassium, sludge, total, dry weight [as K] | 3 | 0 | 0 | ||
| Phosphorus, sludge, total, dry weight [as P] | 3 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 7Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| December 31, 2024 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| October 31, 2023 | Reporting Violations - Late Submittal of DMRs | ST6 |
| April 25, 2023 | Monitoring Violations - Invalid/Unrepresentative Sample | ST6 |
| April 10, 2023 | Reporting Violations - Failure to Notify | ST6 |
| July 25, 2018 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| May 9, 2018 | Effluent Violations - Narrative Effluent Violation | ST6 |
| October 31, 2017 | Reporting Violations - Late Submittal of DMRs | ST6 |
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.