Clean Water Act discharge permit · NPDES OK0026051
SHAWNEE MUNICIPAL AUTH-SOUTH, Shawnee, OK: NPDES OK0026051 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 58Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
SHAWNEE MUNICIPAL AUTH-SOUTH, held by Shawnee Municipal Auth-Southside WWTF, holds NPDES permit OK0026051, which discharges to 520510 North Canadian River. EPA’s file records it issued November 26, 2013 and expiring January 31, 2019. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | SHAWNEE MUNICIPAL AUTH-SOUTH |
|---|---|
| Permittee as filed | Shawnee Municipal Auth-Southside WWTF |
| NPDES ID | OK0026051 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | November 26, 2013 |
| Expiration date | January 31, 2019 |
| Issuing agency | ODEQ |
| Address | Shawnee, OK 74802 |
| Receiving water | 520510 North Canadian River |
| Subwatershed | Lost Creek-North Canadian River (HUC 111003020206) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 59Pollutants on file
- 58Under a numeric limit
- 55With a violation of any kind
- 8With 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 | 0 | 8 | 8 | May 31, 2025 | 2,856% over the limit |
| pH | 6 | 20 | 6 | December 31, 2012 | |
| Solids, total suspended | 3 | 12 | 3 | December 31, 2024 | 180% over the limit |
| Coliform, fecal general | 4 | 7 | 3 | May 31, 2019 | 19% over the limit |
| Endosulfan, total | 3 | 8 | 2 | May 31, 2009 | 614% over the limit |
| BOD, 5-day, 20 deg. C | 3 | 10 | 1 | February 29, 2012 | 3% over the limit |
| Whole effluent toxicity | 1 | 2 | 1 | March 31, 2025 | 5% over the limit |
| Chlorine, total residual | 1 | 2 | 1 | July 31, 2010 | 300% over the limit |
| Nitrogen, ammonia total [as N] | 7 | 17 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 5 | 8 | 0 | ||
| %Mortality Static Renewal 48Hr Acute Daphnia Pulex | 2 | 8 | 0 | ||
| Arsenic, dry weight | 5 | 7 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 2 | 7 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 2 | 7 | 0 | ||
| LC50 Static Renewal 48Hr Acute Daphnia pulex | 2 | 6 | 0 | ||
| %Mortality 7Day Chronic Ceriodaphnia dubia | 2 | 6 | 0 | ||
| %Mortality Static Renewal 7Day Chronic Pimephales Promelas | 2 | 6 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 6 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 6 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 6 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 2 | 6 | 0 | ||
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 5 | 0 | ||
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 2 | 5 | 0 | ||
| LC50 Static Renewal 48Hr Acute Pimephales promelas | 1 | 5 | 0 | ||
| % Mortality Static Renewal 48 Hr Pimephales promelas or use TJA6C | 1 | 5 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 4 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 4 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 4 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 2 | 4 | 0 | ||
| LC50 Pass/Fail Static Renewal 48Hr Acute Daphnia Pulex | 2 | 4 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 2 | 4 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 2 | 4 | 0 | ||
| Selenium, dry weight | 3 | 3 | 0 | ||
| Copper, dry weight | 3 | 3 | 0 | ||
| Cadmium, dry weight | 3 | 3 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 3 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 3 | 0 | ||
| Level of pathogen requirements achieved | 2 | 3 | 0 | ||
| Description of pathogen option used | 2 | 3 | 0 | ||
| Vector attraction reduction alternative used | 2 | 3 | 0 | ||
| LC50 Static Renewal 48Hr Acute Pimephales promelas | 1 | 3 | 0 | ||
| Whole effluent toxicity - retest #2 | 4 | 2 | 0 | ||
| Unit w/liner/leachate collection system | 1 | 2 | 0 | ||
| Unit boundary to property line distance | 1 | 2 | 0 | ||
| Compliance w/part 258 sludge requirement | 1 | 2 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 1 | 0 | ||
| Toxicity characteristic leaching procedure | 1 | 1 | 0 | ||
| Ann. amt sludge disposed by other method | 1 | 1 | 0 | ||
| Annual amt of sludge incinerated | 1 | 1 | 0 | ||
| Annual sludge production, total | 1 | 1 | 0 | ||
| Annual amount of sludge land applied | 1 | 1 | 0 | ||
| Annual amt. sludge disposed surface unit | 1 | 1 | 0 | ||
| Annual amt sludge disposed in landfill | 1 | 1 | 0 | ||
| Annual amt sludge transported interstate | 1 | 1 | 0 | ||
| Pollutant table from 503.13 | 1 | 1 | 0 | ||
| Whole effluent toxicity - retest #1 | 4 | 0 | 0 | ||
| Lead, total [as Pb] | 1 | 0 | 0 | ||
| Annual whole sludge application rate | 1 | 0 | 0 | ||
| Solids, total dissolved- 180 deg. C | 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
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| June 17, 2020 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| June 17, 2020 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| February 20, 2018 | Permit Violations - Violation Specified in Comment | ST6 |
| October 23, 2017 | Permit Violations - Violation Specified in Comment | 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 September 15, 2026.