Clean Water Act discharge permit · NPDES MO0125393
TIMBERLAKE ESTATES WWTP, Boonville, MO: NPDES MO0125393 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 6Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
TIMBERLAKE ESTATES WWTP, held by Timber Homeowners Association, holds NPDES permit MO0125393, which discharges to Tributary To Thomas Branch. EPA’s file records it issued March 18, 2020 and expiring December 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 | TIMBERLAKE ESTATES WWTP |
|---|---|
| Permittee as filed | Timber Homeowners Association |
| NPDES ID | MO0125393 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | March 18, 2020 |
| Expiration date | December 31, 2024 |
| Address | Boonville, MO 65233 |
| Receiving water | Tributary to Thomas Branch |
| Subwatershed | Bartlett Creek-Missouri River (HUC 103001020501) |
| SIC | 8641 – Civic And Social Associations |
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
- 6Pollutants on file
- 6Under a numeric limit
- 6With a violation of any kind
- 4With 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] | 4 | 17 | 15 | March 31, 2026 | 2,700% over the limit |
| Solids, total suspended | 2 | 6 | 4 | June 30, 2024 | 277% over the limit |
| E. coli | 2 | 8 | 2 | June 30, 2025 | 112% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 4 | 2 | December 31, 2013 | 247% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 4 | 0 | ||
| pH | 2 | 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
- 12Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 28, 2026 | Effluent Violations - Numeric effluent violation | ST6 |
| April 16, 2026 | Effluent Violations - Unauthorized Discharge | ST6 |
| April 16, 2026 | Effluent Violations - Numeric effluent violation | ST6 |
| April 16, 2026 | Effluent Violations - Narrative Effluent Violation | ST6 |
| April 16, 2026 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| April 16, 2026 | Permit Violations - Failure to Submit Timely Permit Renewal Application | ST6 |
| April 16, 2026 | Permit Violations - Violation Specified in Comment | ST6 |
| December 31, 2024 | Effluent Violations - Numeric effluent violation | ST6 |
| December 30, 2022 | Effluent Violations - Numeric effluent violation | ST6 |
| December 30, 2022 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| April 8, 2021 | Effluent Violations - Narrative Effluent Violation | ST6 |
| April 8, 2021 | Management Practice Violations - Improper Operation and Maintenance | 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
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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 MO0125393 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.