Clean Water Act discharge permit · NPDES MO0055379
MONROE CITY WWTP, Monroe City, MO: NPDES MO0055379 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 16Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
MONROE CITY WWTP, held by City of Monroe, holds NPDES permit MO0055379, which discharges to Tributary To Sharpsburg Branch. EPA’s file records it issued June 7, 2019 and expiring March 31, 2024. 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 | MONROE CITY WWTP |
|---|---|
| Permittee as filed | City of Monroe |
| NPDES ID | MO0055379 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | June 7, 2019 |
| Expiration date | March 31, 2024 |
| Address | Monroe City, MO 63456 |
| Receiving water | Tributary to Sharpsburg Branch |
| Subwatershed | Headwaters South Fork North River (HUC 071100040105) |
| Program components on file | Biosolids, 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
- 22Pollutants on file
- 16Under a numeric limit
- 18With 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 |
|---|---|---|---|---|---|
| Copper, total recoverable | 2 | 21 | 17 | March 31, 2019 | 298% over the limit |
| Zinc, total recoverable | 2 | 15 | 11 | May 31, 2018 | 149% over the limit |
| pH | 2 | 13 | 7 | July 31, 2023 | |
| Nitrogen, ammonia total [as N] | 6 | 9 | 5 | July 31, 2021 | 673% over the limit |
| Chromium, hexavalent dissolved [as Cr] | 2 | 6 | 2 | August 31, 2019 | 37% over the limit |
| Ammonia [as N] + unionized ammonia | 0 | 1 | 1 | February 28, 2007 | 71% over the limit |
| BOD, 5-day, 20 deg. C | 3 | 8 | 0 | ||
| Oil and grease [soxhlet extr.] tot. | 2 | 8 | 0 | ||
| Phosphorus, total [as P] | 4 | 6 | 0 | ||
| Nitrogen, total [as N] | 0 | 6 | 0 | ||
| Solids, total suspended | 3 | 4 | 0 | ||
| Selenium, total recoverable | 2 | 4 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 4 | 0 | ||
| Hardness, total [as CaCO3] | 2 | 2 | 0 | ||
| Chromium, trivalent total recoverable | 0 | 2 | 0 | ||
| Pass/Fail Static 48Hr Acute Ceriodaphnia dubia | 0 | 2 | 0 | ||
| E. coli | 0 | 1 | 0 | ||
| LC50 Static 48Hr Acute Pimephales promelas | 0 | 1 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 4 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 4 | 0 | 0 | ||
| BOD, 5-day, percent removal | 1 | 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
- 8Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 14, 2025 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| April 14, 2025 | Permit Violations - Failure to Submit Timely Permit Renewal Application | ST6 |
| April 14, 2025 | Permit Violations - Unapproved Operation | ST6 |
| November 16, 2023 | Reporting Violations - Failure to Submit DMRs | ST6 |
| July 16, 2019 | Effluent Violations - Numeric effluent violation | ST6 |
| July 16, 2019 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| December 28, 2018 | Effluent Violations - Numeric effluent violation | ST6 |
| May 30, 2018 | Pretreatment - Failure to Develop/Enforce Standards | 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.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MO0055379.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
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 MO0055379 there.
Nearby on the register
- Discharge permits in Monroe City
- Every permit record in Monroe City, A to Z
- Discharge permits in Missouri
- Every permit record in Missouri, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.