Clean Water Act discharge permit · NPDES MO0137111
LIBERTY WWTP, Liberty, MO: NPDES MO0137111 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 13Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
LIBERTY WWTP, held by City of Liberty, holds NPDES permit MO0137111, which discharges to Shoal Cr.. EPA’s file records it issued April 22, 2019 and expiring December 31, 2023. 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 | LIBERTY WWTP |
|---|---|
| Permittee as filed | City of Liberty |
| NPDES ID | MO0137111 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | April 22, 2019 |
| Expiration date | December 31, 2023 |
| Address | Liberty, MO 64068 |
| Receiving water | Shoal Cr. |
| Subwatershed | Lower Shoal Creek (HUC 103001010304) |
| Program components on file | 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
- 14Pollutants on file
- 13Under a numeric limit
- 8With 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 | 19 | 19 | May 31, 2023 | 740% over the limit |
| BOD, 5-day, 20 deg. C | 4 | 10 | 10 | January 31, 2024 | 250% over the limit |
| E. coli | 2 | 4 | 4 | September 30, 2022 | 432% over the limit |
| E. coli, colony forming units [CFU] | 0 | 2 | 2 | May 31, 2017 | 134% over the limit |
| pH | 2 | 1 | 1 | March 31, 2019 | |
| Oil and grease [soxhlet extr.] tot. | 2 | 1 | 1 | November 30, 2024 | 30% over the limit |
| BOD, 5-day, percent removal | 1 | 1 | 1 | May 31, 2019 | 27% over the limit |
| Oxygen demand, chem. [high level] [COD] | 2 | 90 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 6 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 6 | 0 | 0 | ||
| Phosphorus, total [as P] | 6 | 0 | 0 | ||
| Solids, total suspended | 2 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| October 21, 2022 | 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, MO0137111.
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 MO0137111 there.
Nearby on the register
- Discharge permits in Liberty
- Every permit record in Liberty, 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.