Clean Water Act discharge permit · NPDES OK0026115
ADA, CITY OF, Ada, OK: NPDES OK0026115 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 51Pollutants under a numeric limit
- 13Pollutants with an effluent exceedance
- 3Inspections on file
- 0Formal enforcement actions
ADA, CITY OF, held by Ada, City of, holds NPDES permit OK0026115, which discharges to 5206000320_00 Little Sandy Creek. EPA’s file records it issued June 28, 2017 and expiring July 31, 2022.
ADA, CITY OF, Ada, Oklahoma: Individual permit OK0026115, held by Ada, City of; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued June 28, 2017, term to July 31, 2022, by ODEQ; discharges to 5206000320_00 Little Sandy Creek; Sewage Treatment Facilities.
- Solids, total suspended: 6 limits, 83 violations of any kind, 58 effluent exceedances, latest January 31, 2010, largest 381% over the limit.
- Coliform, fecal general: 0 limits, 43 violations of any kind, 33 effluent exceedances, latest June 30, 2011, largest 99,999% over the limit.
- BOD, 5-day, 20 deg. C: 3 limits, 20 violations of any kind, 14 effluent exceedances, latest January 31, 2010, largest 170% over the limit.
- E. coli: 2 limits, 14 violations of any kind, 14 effluent exceedances, latest September 30, 2024, largest 2,043% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 3 limits, 29 violations of any kind, 13 effluent exceedances, latest April 30, 2014, largest 133% over the limit.
- Selenium, total [as Se]: 3 limits, 28 violations of any kind, 13 effluent exceedances, latest February 28, 2023, largest 99,999% over the limit.
- Nitrogen, ammonia total [as N]: 12 limits, 32 violations of any kind, 6 effluent exceedances, latest September 30, 2021, largest 1,294% over the limit.
- Oxygen, dissolved [DO]: 2 limits, 10 violations of any kind, 3 effluent exceedances, latest April 30, 2004, largest 46% over the limit.
- pH: 4 limits, 18 violations of any kind, 2 effluent exceedances, latest November 30, 2012.
- Coliform, fecal - % samples exceeding limit: 0 limits, 5 violations of any kind, 2 effluent exceedances, latest September 30, 2010, largest 100% over the limit.
- Polychlorinated biphenyls [PCBs]: 2 limits, 4 violations of any kind, 2 effluent exceedances, latest December 31, 2016, largest 574% over the limit.
- Arsenic, dry weight: 5 limits, 17 violations of any kind, 1 effluent exceedance, latest December 31, 2018, largest 42% over the limit.
- Selenium, dry weight: 3 limits, 15 violations of any kind, 1 effluent exceedance, latest December 31, 2018, largest 5% over the limit.
- Nickel, sludge, total, dry weight [as Ni]: 5 limits, 18 violations of any kind, 0 effluent exceedances.
- Copper, dry weight: 3 limits, 14 violations of any kind, 0 effluent exceedances.
- Cadmium, dry weight: 3 limits, 14 violations of any kind, 0 effluent exceedances.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits, 14 violations of any kind, 0 effluent exceedances.
- Zinc, sludge, total, dry weight [as Zn]: 3 limits, 14 violations of any kind, 0 effluent exceedances.
- Lead, sludge, total, dry weight [as Pb]: 3 limits, 14 violations of any kind, 0 effluent exceedances.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits, 14 violations of any kind, 0 effluent exceedances.
- Flow, in conduit or thru treatment plant: 1 limit, 14 violations of any kind, 0 effluent exceedances.
- Level of pathogen requirements achieved: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- Description of pathogen option used: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- Vector attraction reduction alternative used: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia: 1 limit, 5 violations of any kind, 0 effluent exceedances.
- Solids, total dissolved- 180 deg. C: 4 limits, 4 violations of any kind, 0 effluent exceedances.
- Chromium, sludge, total, dry weight [as Cr]: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- Pollutant table from 503.13: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Toxicity characteristic leaching procedure: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Annual whole sludge application rate: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Ann. amt sludge disposed by other method: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Annual amt of sludge incinerated: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Annual sludge production, total: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Annual amount of sludge land applied: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Annual amt. sludge disposed surface unit: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Annual amt sludge disposed in landfill: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Annual amt sludge transported interstate: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Unit w/liner/leachate collection system: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Unit boundary to property line distance: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Compliance w/part 258 sludge requirement: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Pass/Fail Static Renewal 7Day Chronic Pimephales promelas: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- %Mortality 7Day Chronic Ceriodaphnia dubia: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- %Mortality Static Renewal 7Day Chronic Pimephales Promelas: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Coef Of Var Static Renewal 7Day Chronic Pimephales promelas: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #1: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #2: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- November 2, 2026: Letter of Violation/ Warning Letter (State).
- October 1, 2026: Evaluation (S).
- August 21, 2026: Letter of Violation/ Warning Letter (State).
- March 30, 2026: Evaluation (S).
- March 26, 2026: Evaluation (S).
- May 15, 2023: Effluent Violations - Unapproved Bypass (ST6).
- April 26, 2023: Effluent Violations - Unapproved Bypass (ST6).
- March 8, 2023: Effluent Violations - Unapproved Bypass (ST6).
- February 4, 2020: Management Practice Violations - Best Management Practice Deficiencies (ST6).
- February 4, 2020: Monitoring Violations - Improper Analysis or Lab Error (ST6).
- February 4, 2020: Permit Violations - Violation Specified in Comment (ST6).
- February 25, 2019: Permit Violations - Violation Specified in Comment (ST6).
Oklahoma holds 197 Publicly owned treatment works coverages of this permit type in EPA’s file; 94 were issued before OK0026115.
Coverages issued nearest OK0026115
- February 22, 2017: PENSACOLA PUB WORKS AUTHORITY, Pensacola, OK0040410, held by Pensacola PWA
- April 6, 2017: OWASSO PUBLIC WORKS AUTHORITY, Owasso, OK0020303, held by Owasso PWA
- April 6, 2017: CHECOTAH WWTP, Checotah, OK0028100, held by Checotah PWA
- May 23, 2017: WETUMKA-SOUTH WWTF, Wetumka, OK0032417, held by Wetumka South WWTF
- June 15, 2017: OILTON WA, Oilton, OK0035599, held by Oilton PWA
- July 21, 2017: FRANCIS WWT, Francis, OK0036064, held by Francis PWA
- July 28, 2017: GREEN COUNTRY SEWER CO-SUNRISE, Wagoner County, OK0034754, held by Green Country Sewer Company
- August 4, 2017: CHOUTEAU PWA, Chouteau, OK0022764, held by Chouteau PWA
- August 18, 2017: DRUMRIGHT UTILITIES TRUST, Drumright, OK0022501, held by Drumright Utilities Trust
- August 18, 2017: WETUMKA NORTH WWTF, Wetumka, OK0032425, held by Wetumka North WWTF
ADA, CITY OF among its neighbors
EPA’s permit file holds 7 discharge permits in the Outlet Canadian Sandy Creek subwatershed (HUC 110902020406), OK0026115 among them. Its county holds 7, 1 of them major permits; OK0026115 is a major permit.
Other permits in the Outlet Canadian Sandy Creek subwatershed (HUC 110902020406)
- ADA TRIBAL PRE-K, Ada: OKR10I02U, minor permit, permit term to February 16, 2027
- AE3900 HICKORY 12-INCH REPLACEMENT, Ada: OKR10F01K, minor permit, permit term to February 15, 2022
- AE4614 SANDY CREEK 2-INCH UPGRADE, Ada: OKR10F02D, minor permit, permit term to February 16, 2027
- HINA CHOKMA, Ada: OKR10I03T, minor permit, permit term to February 16, 2027
- LIGHTHORSE POLICE HEADQUARTERS, Ada: OKR10I042, minor permit, permit term to February 16, 2027
- RECORDS INFORMATION MANAGEMENT, Ada: OKR10I03H, minor permit, permit term to February 16, 2027
Identity
| Facility as filed | ADA, CITY OF |
|---|---|
| Permittee as filed | Ada, City of |
| NPDES ID | OK0026115 |
| 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 | June 28, 2017 |
| Expiration date | July 31, 2022 |
| Issuing agency | ODEQ |
| Address | Ada, OK 74820 |
| Receiving water | 5206000320_00 Little Sandy Creek |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Outlet Canadian Sandy Creek (HUC 110902020406) |
| Program components on file | Biosolids, POTW, Pretreatment |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
Effluent limits and exceedances
- 53Pollutants on file
- 51Under a numeric limit
- 51With a violation of any kind
- 13With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 6 | 83 | 58 | January 31, 2010 | 381% over the limit |
| Coliform, fecal general | 0 | 43 | 33 | June 30, 2011 | 99,999% over the limit |
| BOD, 5-day, 20 deg. C | 3 | 20 | 14 | January 31, 2010 | 170% over the limit |
| E. coli | 2 | 14 | 14 | September 30, 2024 | 2,043% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 3 | 29 | 13 | April 30, 2014 | 133% over the limit |
| Selenium, total [as Se] | 3 | 28 | 13 | February 28, 2023 | 99,999% over the limit |
| Nitrogen, ammonia total [as N] | 12 | 32 | 6 | September 30, 2021 | 1,294% over the limit |
| Oxygen, dissolved [DO] | 2 | 10 | 3 | April 30, 2004 | 46% over the limit |
| pH | 4 | 18 | 2 | November 30, 2012 | |
| Coliform, fecal - % samples exceeding limit | 0 | 5 | 2 | September 30, 2010 | 100% over the limit |
| Polychlorinated biphenyls [PCBs] | 2 | 4 | 2 | December 31, 2016 | 574% over the limit |
| Arsenic, dry weight | 5 | 17 | 1 | December 31, 2018 | 42% over the limit |
| Selenium, dry weight | 3 | 15 | 1 | December 31, 2018 | 5% over the limit |
| Nickel, sludge, total, dry weight [as Ni] | 5 | 18 | 0 | ||
| Copper, dry weight | 3 | 14 | 0 | ||
| Cadmium, dry weight | 3 | 14 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 14 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 14 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 14 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 14 | 0 | ||
| Flow, in conduit or thru treatment plant | 1 | 14 | 0 | ||
| Level of pathogen requirements achieved | 2 | 6 | 0 | ||
| Description of pathogen option used | 2 | 6 | 0 | ||
| Vector attraction reduction alternative used | 2 | 6 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 1 | 5 | 0 | ||
| Solids, total dissolved- 180 deg. C | 4 | 4 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 2 | 4 | 0 | ||
| Pollutant table from 503.13 | 1 | 4 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 1 | 4 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 1 | 4 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 1 | 4 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 1 | 4 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 1 | 4 | 0 | ||
| Toxicity characteristic leaching procedure | 1 | 2 | 0 | ||
| Annual whole sludge application rate | 1 | 2 | 0 | ||
| Ann. amt sludge disposed by other method | 1 | 2 | 0 | ||
| Annual amt of sludge incinerated | 1 | 2 | 0 | ||
| Annual sludge production, total | 1 | 2 | 0 | ||
| Annual amount of sludge land applied | 1 | 2 | 0 | ||
| Annual amt. sludge disposed surface unit | 1 | 2 | 0 | ||
| Annual amt sludge disposed in landfill | 1 | 2 | 0 | ||
| Annual amt sludge transported interstate | 1 | 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 | ||
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 1 | 1 | 0 | ||
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | 1 | 1 | 0 | ||
| %Mortality 7Day Chronic Ceriodaphnia dubia | 1 | 1 | 0 | ||
| %Mortality Static Renewal 7Day Chronic Pimephales Promelas | 1 | 1 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Ceriodaphnia dubia | 1 | 1 | 0 | ||
| Coef Of Var Static Renewal 7Day Chronic Pimephales promelas | 1 | 1 | 0 | ||
| Whole effluent toxicity - retest #1 | 1 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 1 | 0 | 0 |
Inspections, violations and enforcement
- 7Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| May 15, 2023 | Effluent Violations - Unapproved Bypass | ST6 |
| April 26, 2023 | Effluent Violations - Unapproved Bypass | ST6 |
| March 8, 2023 | Effluent Violations - Unapproved Bypass | ST6 |
| February 4, 2020 | Management Practice Violations - Best Management Practice Deficiencies | ST6 |
| February 4, 2020 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| February 4, 2020 | Permit Violations - Violation Specified in Comment | ST6 |
| February 25, 2019 | Permit Violations - Violation Specified in Comment | ST6 |
Inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| October 1, 2026 | Evaluation | S |
| March 30, 2026 | Evaluation | S |
| March 26, 2026 | Evaluation | S |
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
| Date | What EPA recorded | Agency |
|---|---|---|
| November 2, 2026 | Letter of Violation/ Warning Letter | State |
| August 21, 2026 | Letter of Violation/ Warning Letter | State |
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.