Clean Water Act discharge permit · NPDES MI0021555
ST LOUIS WWTP, St. Louis, MI: NPDES MI0021555 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 26Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
ST LOUIS WWTP, held by City of St. Louis, holds NPDES permit MI0021555, which discharges to Pine River. EPA’s file records it issued November 25, 2015 and expiring October 1, 2018. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | ST LOUIS WWTP |
|---|---|
| Permittee as filed | City of St. Louis |
| NPDES ID | MI0021555 |
| 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 | November 25, 2015 |
| Expiration date | October 1, 2018 |
| Issuing agency | State |
| Address | St. Louis, MI 48880 |
| Receiving water | Pine River |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Sugar Creek-Pine River (HUC 040802020403) |
| Other EPA IDs (FRS) | RCRA handler MIK147134953 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 27Pollutants on file
- 26Under a numeric limit
- 26With a violation of any kind
- 6With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 4 | 50 | 50 | June 30, 2017 | 751% over the limit |
| Coliform, fecal general | 2 | 33 | 21 | June 30, 2017 | 982% over the limit |
| Chlorine, total residual | 1 | 16 | 9 | September 30, 2020 | 950% over the limit |
| Phosphorus, total [as P] | 4 | 15 | 9 | April 30, 2026 | 82% over the limit |
| Mercury, total [as Hg] | 0 | 23 | 4 | November 30, 2014 | 5% over the limit |
| Solids, total suspended | 8 | 21 | 1 | May 31, 2020 | 73% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 8 | 20 | 0 | ||
| pH | 2 | 12 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 10 | 0 | ||
| BOD, carb-5 day, 20 deg C, percent removal | 2 | 6 | 0 | ||
| Solids, suspended percent removal | 2 | 6 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 6 | 0 | ||
| Solids, total | 3 | 3 | 0 | ||
| Arsenic, dry weight | 3 | 3 | 0 | ||
| Selenium, dry weight | 3 | 3 | 0 | ||
| Copper, dry weight | 3 | 3 | 0 | ||
| Cadmium, dry weight | 3 | 3 | 0 | ||
| Nitrogen, total Kjeldahl | 3 | 3 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 3 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 3 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 3 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 3 | 0 | ||
| Nitrogen, sludge, total, dry weight [as N] | 3 | 3 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 3 | 0 | ||
| Potassium, sludge, total, dry weight [as K] | 3 | 3 | 0 | ||
| Phosphorus, sludge, total, dry weight [as P] | 3 | 3 | 0 | ||
| Selenium, total [as Se] | 4 | 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
- 6Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 9, 2025 | Monitoring Violations - Invalid/Unrepresentative Sample | ST6 |
| January 9, 2025 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| October 5, 2023 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| June 24, 2021 | Monitoring Violations - Failure to Monitor for Non-Toxicity Requirements | ST6 |
| June 24, 2021 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| October 31, 2018 | 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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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID MI0021555 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.