Clean Water Act discharge permit · NPDES MO0132021
TWIN OAKS ESTATES WWTP, Knob Noster, MO: NPDES MO0132021 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 6Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
TWIN OAKS ESTATES WWTP, held by Elm Hills Utility Operating Company, Inc, holds NPDES permit MO0132021, which discharges to Tributary To Long Branch Creek. EPA’s file records it issued June 21, 2017 and expiring June 30, 2021. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | TWIN OAKS ESTATES WWTP |
|---|---|
| Permittee as filed | Elm Hills Utility Operating Company, Inc |
| NPDES ID | MO0132021 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | June 21, 2017 |
| Expiration date | June 30, 2021 |
| Address | Knob Noster, MO 65336 |
| Receiving water | Tributary to Long Branch Creek |
| Subwatershed | Long Branch (HUC 103001030402) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 7Pollutants on file
- 6Under a numeric limit
- 4With 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 |
|---|---|---|---|---|---|
| E. coli, colony forming units [CFU] | 0 | 6 | 6 | June 30, 2017 | 864% over the limit |
| E. coli | 2 | 5 | 5 | June 30, 2019 | 99,999% over the limit |
| Nitrogen, ammonia total [as N] | 4 | 4 | 4 | March 31, 2019 | 525% over the limit |
| Solids, total suspended | 2 | 1 | 1 | December 31, 2017 | 50% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 0 | 0 | ||
| pH | 2 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES MO0132021.
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 MO0132021 there.
Nearby on the register
- Discharge permits in Knob Noster
- Every permit record in Knob Noster, A to Z
- Discharge permits in Missouri
- Every permit record in Missouri, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.