Clean Water Act discharge permit · NPDES MO0099457
PALMYRA WWTP, Palmyra, MO: NPDES MO0099457 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 11Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
PALMYRA WWTP, held by City of Palmyra, holds NPDES permit MO0099457, which discharges to North River. EPA’s file records it issued December 14, 2016 and expiring June 30, 2019. 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 | PALMYRA WWTP |
|---|---|
| Permittee as filed | City of Palmyra |
| NPDES ID | MO0099457 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | December 14, 2016 |
| Expiration date | June 30, 2019 |
| Address | Palmyra, MO 63461 |
| Receiving water | North River |
| Subwatershed | North River (HUC 071100040109) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 17Pollutants on file
- 11Under a numeric limit
- 17With a violation of any kind
- 7With 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] | 8 | 33 | 21 | May 31, 2025 | 2,300% over the limit |
| Coliform, fecal general | 0 | 15 | 15 | May 31, 2014 | 17,150% over the limit |
| pH | 2 | 10 | 3 | January 31, 2023 | |
| Oil and grease [soxhlet extr.] tot. | 2 | 10 | 2 | September 30, 2022 | 30% over the limit |
| Solids, total suspended | 3 | 12 | 1 | October 31, 2013 | 2% over the limit |
| BOD, 5-day, percent removal | 0 | 4 | 1 | July 31, 2020 | 28% over the limit |
| Solids, suspended percent removal | 0 | 4 | 1 | March 31, 2026 | 47% over the limit |
| Phosphorus, total [as P] | 4 | 20 | 0 | ||
| Nitrogen, total [as N] | 4 | 14 | 0 | ||
| BOD, 5-day, 20 deg. C | 3 | 11 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 6 | 0 | ||
| E. coli | 2 | 6 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 0 | 6 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 6 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 1 | 3 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 1 | 3 | 0 | ||
| Report due [yrmoda] | 0 | 3 | 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
- 10Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| November 16, 2023 | Reporting Violations - Failure to Submit DMRs | ST6 |
| October 11, 2023 | Management Practice Violations - No Licensed/Certified Operator | ST6 |
| October 11, 2023 | Permit Violations - Violation Specified in Comment | ST6 |
| October 11, 2023 | Effluent Violations - Numeric effluent violation | ST6 |
| June 30, 2023 | Effluent Violations - Numeric effluent violation | ST6 |
| March 31, 2023 | Effluent Violations - Numeric effluent violation | ST6 |
| March 31, 2023 | Reporting Violations - Failure to Submit DMRs | ST6 |
| September 30, 2021 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| June 30, 2020 | Reporting Violations - Failure to Submit DMRs | ST6 |
| June 14, 2019 | Permit Violations - Violation Specified in Comment | 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 MO0099457 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.