Clean Water Act discharge permit · NPDES OK0100498
HALLIBURTON ENERGY SERVICES, INC., Duncan, OK: NPDES OK0100498 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 3Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
HALLIBURTON ENERGY SERVICES, INC., held by Halliburton Energy Services, Inc., holds NPDES permit OK0100498, which discharges to 311200000100 Trib/ E Cow Creek. EPA’s file records it issued May 27, 2016 and expiring May 31, 2021. 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 | HALLIBURTON ENERGY SERVICES, INC. |
|---|---|
| Permittee as filed | Halliburton Energy Services, Inc. |
| NPDES ID | OK0100498 |
| 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 | May 27, 2016 |
| Expiration date | May 31, 2021 |
| Issuing agency | ODEQ |
| Address | Duncan, OK 73533 |
| Receiving water | 311200000100 trib/ E Cow Creek |
| Subwatershed | East Cow Creek (HUC 111302080301) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 3Pollutants on file
- 3Under a numeric limit
- 2With a violation of any kind
- 1With 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 |
|---|---|---|---|---|---|
| Perchlorate [ClO4] | 2 | 6 | 2 | December 31, 2020 | 800% over the limit |
| pH | 2 | 4 | 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 OK0100498.
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, OK0100498.
Start the watch
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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 OK0100498 there.
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- Every permit record in Oklahoma, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.