Clean Water Act discharge permit · NPDES MO0109673
NORTH OAK WWTP, Wright City, MO: NPDES MO0109673 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 6Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
NORTH OAK WWTP, held by North Oak Sewer District, Inc., holds NPDES permit MO0109673, which discharges to Tributary To Indian Camp Creek. EPA’s file records it issued December 1, 2018 and expiring November 30, 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 | NORTH OAK WWTP |
|---|---|
| Permittee as filed | North Oak Sewer District, Inc. |
| NPDES ID | MO0109673 |
| 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 | December 1, 2018 |
| Expiration date | November 30, 2023 |
| Address | Wright City, MO 63390 |
| Receiving water | Tributary to Indian Camp Creek |
| Subwatershed | Indian Camp Creek (HUC 071100080407) |
| 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 |
|---|---|---|---|---|---|
| E. coli | 2 | 11 | 11 | December 31, 2025 | 99,999% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 7 | 5 | September 30, 2024 | 207% over the limit |
| Solids, total suspended | 2 | 7 | 5 | September 30, 2024 | 177% over the limit |
| pH | 2 | 3 | 1 | August 31, 2006 | |
| Nitrogen, ammonia total [as N] | 4 | 2 | 0 | ||
| Flow, in conduit or thru treatment plant | 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
- 11Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| February 11, 2026 | Effluent Violations - Numeric effluent violation | ST6 |
| December 5, 2025 | Effluent Violations - Numeric effluent violation | ST6 |
| March 31, 2025 | Effluent Violations - Numeric effluent violation | ST6 |
| April 29, 2024 | Effluent Violations - Narrative Effluent Violation | ST6 |
| April 29, 2024 | Effluent Violations - Numeric effluent violation | ST6 |
| September 21, 2022 | Effluent Violations - Narrative Effluent Violation | ST6 |
| September 30, 2020 | Effluent Violations - Numeric effluent violation | ST6 |
| March 29, 2019 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| March 29, 2019 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| March 29, 2019 | Permit Violations - Violation Specified in Comment | ST6 |
| March 29, 2019 | Reporting Violations - Failure to submit required report (non-DMR non-pretreatment) | 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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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.