Clean Water Act discharge permit · NPDES MO0040843
MARSHFIELD WWTP, Marshfield, MO: NPDES MO0040843 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 24Pollutants under a numeric limit
- 11Pollutants with an effluent exceedance
MARSHFIELD WWTP, held by City of Marshfield, holds NPDES permit MO0040843, which discharges to Tributary To W. Fk. Niangua R.. EPA’s file records it issued February 6, 2019 and expiring September 30, 2023. 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 | MARSHFIELD WWTP |
|---|---|
| Permittee as filed | City of Marshfield |
| NPDES ID | MO0040843 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | February 6, 2019 |
| Expiration date | September 30, 2023 |
| Address | Marshfield, MO 65706 |
| Receiving water | Tributary to W. Fk. Niangua R. |
| Subwatershed | Headwaters Niangua River (HUC 102901100101) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 25Pollutants on file
- 24Under a numeric limit
- 25With a violation of any kind
- 11With 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 |
|---|---|---|---|---|---|
| E. coli | 2 | 41 | 31 | April 30, 2026 | 99,999% over the limit |
| Cyanide, free [amenable to chlorination] | 2 | 12 | 8 | June 30, 2018 | 321% over the limit |
| Zinc, total recoverable | 4 | 11 | 7 | June 30, 2024 | 47% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 16 | 6 | February 28, 2025 | 334% over the limit |
| Solids, suspended percent removal | 1 | 10 | 5 | May 31, 2026 | 204% over the limit |
| pH | 2 | 14 | 4 | May 31, 2026 | |
| BOD, 5-day, percent removal | 1 | 7 | 2 | March 31, 2024 | 43% over the limit |
| Lead, total recoverable | 4 | 6 | 2 | March 31, 2022 | 15% over the limit |
| Nitrogen, ammonia total [as N] | 6 | 15 | 1 | July 31, 2026 | 63% over the limit |
| Solids, total suspended | 2 | 11 | 1 | February 28, 2025 | 25% over the limit |
| Copper, total recoverable | 2 | 5 | 1 | September 30, 2026 (as filed; later than the file's load date) | 35% over the limit |
| Oxygen, dissolved [DO] | 2 | 10 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 10 | 0 | ||
| Chlorine, total residual | 2 | 10 | 0 | ||
| Phosphorus, total [as P] | 4 | 8 | 0 | ||
| Cadmium, total recoverable | 2 | 6 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 4 | 4 | 0 | ||
| Nitrite + Nitrate total [as N] | 4 | 4 | 0 | ||
| Oil and grease [soxhlet extr.] tot. | 2 | 4 | 0 | ||
| Hardness, total [as CaCO3] | 2 | 4 | 0 | ||
| Chromium, hexavalent dissolved [as Cr] | 2 | 4 | 0 | ||
| Chromium, trivalent total recoverable | 2 | 4 | 0 | ||
| Nitrogen, total [as N] | 0 | 4 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 2 | 1 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 2 | 1 | 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
- 12Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| September 25, 2024 | Effluent Violations - Numeric effluent violation | ST6 |
| May 7, 2020 | Pretreatment - Failure to Develop/Enforce Standards | ST6 |
| May 7, 2020 | Permit Violations - Violation Specified in Comment | ST6 |
| November 30, 2018 | Permit Violations - Unapproved Operation | ST6 |
| July 11, 2017 | Permit Violations - Violation Specified in Comment | ST6 |
| July 11, 2017 | Effluent Violations - Numeric effluent violation | ST6 |
| July 11, 2017 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| July 11, 2017 | Pretreatment - Failure to Develop/Enforce Standards | ST6 |
| July 11, 2017 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| July 11, 2017 | Reporting Violations - Failure to Submit DMRs | ST6 |
| July 11, 2017 | Effluent Violations - Narrative Effluent Violation | ST6 |
| July 11, 2017 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | 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 September 15, 2026.