Clean Water Act discharge permit · NPDES NDG070559
OASIS MIDSTREAM SERVICES, LLC (OMS), ND: NPDES NDG070559 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 7Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
OASIS MIDSTREAM SERVICES, LLC (OMS), held by Oasis Midstream Services, LLC, holds NPDES permit NDG070559. EPA’s file records it issued March 25, 2015 and expiring March 31, 2020. 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 | OASIS MIDSTREAM SERVICES, LLC (OMS) |
|---|---|
| Permittee as filed | Oasis Midstream Services, LLC |
| NPDES ID | NDG070559 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | March 25, 2015 |
| Expiration date | March 31, 2020 |
| Issuing agency | North Dakota Department of Environmental Quality |
| Address | ND 58000 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Vince Bayou-Buffalo Bayou (HUC 120401040703) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 7Pollutants on file
- 7Under a numeric limit
- 7With a violation of any kind
- 3With 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 |
|---|---|---|---|---|---|
| pH | 2 | 4 | 2 | June 30, 2019 | |
| Chlorine, total residual | 1 | 3 | 2 | June 30, 2019 | 2,700% over the limit |
| Solids, total suspended | 1 | 2 | 1 | September 30, 2016 | 381% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 4 | 0 | ||
| Flow, total | 2 | 2 | 0 | ||
| Hydrocarbons, total petroleum | 2 | 2 | 0 | ||
| Oil and grease visual | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES NDG070559.
Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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, NDG070559.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
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 NDG070559 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.