Clean Water Act discharge permit · NPDES NCC250770
UNITED THERAPEUTICS XENO1, Research Triangle Park, NC: NPDES NCC250770 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
UNITED THERAPEUTICS XENO1, held by United Therapeutics Corporation, holds NPDES permit NCC250770. EPA’s file records it issued March 14, 2025 and expiring March 31, 2029. 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.
What the register holds for UNITED THERAPEUTICS XENO1: its NPDES ID, its permit type and status, its dates, its address in Research Triangle Park, North Carolina. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES NCC250770.
Identity
| Facility as filed | UNITED THERAPEUTICS XENO1 |
|---|---|
| Permittee as filed | United Therapeutics Corporation |
| NPDES ID | NCC250770 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | March 14, 2025 |
| Expiration date | March 31, 2029 |
| Address | Research Triangle Park, NC 27709 |
| Subwatershed | Northeast Creek (HUC 030300020605) |
| SIC | 1541 – Industrial Buildings And Warehouses |
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
- 0Pollutants on file
- 0Under a numeric limit
- 0With a violation of any kind
- 0With an effluent exceedance
EPA’s limits and effluent violation files hold no pollutant row for NPDES NCC250770.
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 NCC250770.
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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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 NCC250770 there.
Nearby on the register
- Discharge permits in Research Triangle Park
- Every permit record in Research Triangle Park, A to Z
- Discharge permits in North Carolina
- Every permit record in North Carolina, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.