Clean Water Act discharge permit · NPDES MO0097411
MAWC, WILLIBRAND ACRES WWTP, Jefferson City, MO: NPDES MO0097411 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 8Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
MAWC, WILLIBRAND ACRES WWTP, held by MISSOURI-AMERICAN WATER COMPANY, holds NPDES permit MO0097411, which discharges to Tributary To Number 51 Lake. EPA’s file records it issued December 11, 2020 and expiring June 30, 2025. 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 | MAWC, WILLIBRAND ACRES WWTP |
|---|---|
| Permittee as filed | MISSOURI-AMERICAN WATER COMPANY |
| NPDES ID | MO0097411 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | December 11, 2020 |
| Expiration date | June 30, 2025 |
| Address | Jefferson City, MO 65101 |
| Receiving water | Tributary to Number 51 Lake |
| Subwatershed | Rivaux Creek-Missouri River (HUC 103001021306) |
| 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
- 13Pollutants on file
- 8Under a numeric limit
- 13With a violation of any kind
- 5With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 2 | 29 | 3 | March 31, 2021 | 43% over the limit |
| Nitrogen, ammonia total [as N] | 8 | 23 | 3 | June 30, 2021 | 150% over the limit |
| Solids, suspended percent removal | 0 | 12 | 2 | March 31, 2021 | 50% over the limit |
| Coliform, fecal general | 0 | 2 | 2 | September 30, 2013 | 553% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 27 | 1 | June 30, 2026 | 16% over the limit |
| Chlorine, total residual | 2 | 24 | 0 | ||
| pH | 2 | 22 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 22 | 0 | ||
| Oxygen, dissolved [DO] | 2 | 12 | 0 | ||
| E. coli | 2 | 12 | 0 | ||
| E. coli, colony forming units [CFU] | 0 | 10 | 0 | ||
| BOD, 5-day, percent removal | 0 | 10 | 0 | ||
| Ammonia [as N] + unionized ammonia | 0 | 2 | 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
- 5Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| November 3, 2023 | Effluent Violations - Numeric effluent violation | ST6 |
| September 28, 2018 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| June 29, 2018 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| July 14, 2017 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | ST6 |
| July 14, 2017 | Reporting Violations - Improper/ Incorrect Reporting | 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 MO0097411 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.