Clean Water Act discharge permit · NPDES MO0118231
SHELL KNOB ELEMENTARY SCHOOL WWTP, Shell Knob, MO: NPDES MO0118231 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 9Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
SHELL KNOB ELEMENTARY SCHOOL WWTP, held by Shell Knob School District #78, holds NPDES permit MO0118231, which discharges to Tributary To Mill Creek. EPA’s file records it issued March 20, 2019 and expiring March 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 | SHELL KNOB ELEMENTARY SCHOOL WWTP |
|---|---|
| Permittee as filed | Shell Knob School District #78 |
| NPDES ID | MO0118231 |
| 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 20, 2019 |
| Expiration date | March 31, 2024 |
| Address | Shell Knob, MO 65747 |
| Receiving water | Tributary to Mill Creek |
| Subwatershed | Viney Creek-Table Rock Lake (HUC 110100010808) |
| SIC | 8211 – Elementary And Secondary Schools |
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
- 11Pollutants on file
- 9Under a numeric limit
- 11With 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 |
|---|---|---|---|---|---|
| E. coli, colony forming units [CFU] | 0 | 18 | 18 | December 31, 2017 | 99,999% over the limit |
| Chlorine, total residual | 2 | 24 | 12 | December 31, 2025 | 3,650% over the limit |
| E. coli | 2 | 18 | 6 | December 31, 2025 | 855% over the limit |
| Nitrogen, ammonia total [as N] | 4 | 16 | 4 | June 30, 2024 | 429% over the limit |
| Coliform, fecal general | 0 | 4 | 4 | September 30, 2012 | 7,650% over the limit |
| BOD, 5-day, 20 deg. C | 2 | 16 | 2 | December 31, 2022 | 20% over the limit |
| Solids, total suspended | 2 | 16 | 2 | June 30, 2024 | 293% over the limit |
| Oxygen, dissolved [DO] | 2 | 12 | 0 | ||
| pH | 2 | 12 | 0 | ||
| Oil and grease [soxhlet extr.] tot. | 2 | 12 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 12 | 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 MO0118231.
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, MO0118231.
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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 MO0118231 there.
Nearby on the register
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- Every permit record in Shell Knob, A to Z
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- Every permit record in Missouri, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.