Clean Water Act discharge permit · NPDES MO0023221
MACON WWTP, Macon, MO: NPDES MO0023221 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 30Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
MACON WWTP, held by City of Macon, holds NPDES permit MO0023221, which discharges to Sewer Creek. EPA’s file records it issued June 5, 2017 and expiring June 30, 2022. 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 | MACON WWTP |
|---|---|
| Permittee as filed | City of Macon |
| NPDES ID | MO0023221 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | June 5, 2017 |
| Expiration date | June 30, 2022 |
| Address | Macon, MO 63552 |
| Receiving water | Sewer Creek |
| Subwatershed | Brush Creek-Middle Fork Salt River (HUC 071100060203) |
| Program components on file | Biosolids, CSO, POTW, Pretreatment |
| 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
- 33Pollutants on file
- 30Under a numeric limit
- 10With 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 | 14 | 14 | March 31, 2022 | 283% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 23 | 9 | April 30, 2019 | 3,433% over the limit |
| pH | 2 | 59 | 6 | May 31, 2018 | |
| Solids, total suspended | 2 | 16 | 2 | April 30, 2019 | 38% over the limit |
| Pass/Fail Static 48Hr Acute Ceriodaphnia dubia | 0 | 4 | 1 | September 30, 2007 | |
| BOD, 5-day, percent removal | 1 | 1 | 1 | May 31, 2018 | 143% over the limit |
| Oil and grease [soxhlet extr.] tot. | 2 | 12 | 0 | ||
| Ammonia [as N] + unionized ammonia | 0 | 12 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 4 | 0 | ||
| LC50 Static 48Hr Acute Pimephales promelas | 0 | 3 | 0 | ||
| Nitrogen, total [as N] | 4 | 0 | 0 | ||
| Phosphorus, total [as P] | 4 | 0 | 0 | ||
| Cyanide, free [amenable to chlorination] | 2 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 2 | 0 | 0 | ||
| Arsenic, total recoverable | 2 | 0 | 0 | ||
| Iron, total recoverable | 2 | 0 | 0 | ||
| Selenium, total recoverable | 2 | 0 | 0 | ||
| Thallium, total recoverable | 2 | 0 | 0 | ||
| Beryllium, total recoverable [as Be] | 2 | 0 | 0 | ||
| Nickel, total recoverable | 2 | 0 | 0 | ||
| Silver total recoverable | 2 | 0 | 0 | ||
| Zinc, total recoverable | 2 | 0 | 0 | ||
| Aluminum, total recoverable | 2 | 0 | 0 | ||
| Cadmium, total recoverable | 2 | 0 | 0 | ||
| Lead, total recoverable | 2 | 0 | 0 | ||
| Copper, total recoverable | 2 | 0 | 0 | ||
| Antimony, total recoverable | 2 | 0 | 0 | ||
| Di[2-ethylhexyl] phthalate [DEHP] | 2 | 0 | 0 | ||
| E. coli | 2 | 0 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 2 | 0 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 2 | 0 | 0 | ||
| Mercury, total recoverable | 2 | 0 | 0 | ||
| Solids, suspended percent removal | 1 | 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 |
|---|---|---|
| June 22, 2026 | Permit Violations - Violation Specified in Comment | ST6 |
| October 11, 2024 | Permit Violations - Unapproved Operation | ST6 |
| October 11, 2024 | Effluent Violations - Narrative Effluent Violation | ST6 |
| September 24, 2019 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| September 24, 2019 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| September 24, 2019 | Effluent Violations - Numeric effluent violation | 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.