Clean Water Act discharge permit · NPDES VA0093017
WMATA SILVER LINE PHASE II, Sterling, VA: NPDES VA0093017 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 10Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
WMATA SILVER LINE PHASE II, held by Washington Metropolitan Area Transit Authority, holds NPDES permit VA0093017, which discharges to Horsepen Run. EPA’s file records it issued July 7, 2021 and expiring July 31, 2026. 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 | WMATA SILVER LINE PHASE II |
|---|---|
| Permittee as filed | Washington Metropolitan Area Transit Authority |
| NPDES ID | VA0093017 |
| 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 | July 7, 2021 |
| Expiration date | July 31, 2026 |
| Issuing agency | VA DEQ |
| Address | Sterling, VA 20166 |
| Receiving water | Horsepen Run |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Horsepen Run (HUC 020700080902) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 10Pollutants on file
- 10Under a numeric limit
- 2With a violation of any kind
- 0With 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 |
|---|---|---|---|---|---|
| Flow, in conduit or thru treatment plant | 50 | 40 | 0 | ||
| 1,2-Propanediol | 40 | 40 | 0 | ||
| pH | 10 | 0 | 0 | ||
| Solids, total suspended | 5 | 0 | 0 | ||
| Nitrogen, total [as N] | 5 | 0 | 0 | ||
| Nitrogen, ammonia total [as N] | 5 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 5 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 5 | 0 | 0 | ||
| Phosphorus, total [as P] | 5 | 0 | 0 | ||
| Petrol hydrocarbons, total recoverable | 5 | 0 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES VA0093017.
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 VA0093017.
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
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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 VA0093017 there.
Nearby on the register
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- Every permit record in Sterling, A to Z
- Discharge permits in Virginia
- Every permit record in Virginia, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.