Clean Water Act discharge permit · NPDES MDG870543
JOHNS HOPKINS UNIVERSITY - APPLIED PHYSICS LABORATORY, Laurel, MD: NPDES MDG870543 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
JOHNS HOPKINS UNIVERSITY - APPLIED PHYSICS LABORATORY, held by Johns Hopkins University - Applied Physics Laboratory, holds NPDES permit MDG870543, which discharges to Middle Patuxent River. EPA’s file records it issued May 29, 2025 and expiring May 29, 2026. 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 JOHNS HOPKINS UNIVERSITY - APPLIED PHYSICS LABORATORY: its NPDES ID, its permit type and status, its dates, its address in Laurel, Maryland, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MDG870543.
Identity
| Facility as filed | JOHNS HOPKINS UNIVERSITY - APPLIED PHYSICS LABORATORY |
|---|---|
| Permittee as filed | Johns Hopkins University - Applied Physics Laboratory |
| NPDES ID | MDG870543 |
| 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 | May 29, 2025 |
| Expiration date | May 29, 2026 |
| Issuing agency | MARYLAND DEPARTMENT OF THE ENVIRONMENT |
| Address | Laurel, MD 21044 |
| Receiving water | Middle Patuxent River |
| Subwatershed | Benson Branch-Middle Patuxent River (HUC 020600060201) |
Cited to the EPA ICIS-NPDES permit file (ECHO 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 MDG870543.
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 MDG870543.
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, MDG870543.
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 MDG870543 there.
Nearby on the register
- Discharge permits in Laurel
- Every permit record in Laurel, A to Z
- Discharge permits in Maryland
- Every permit record in Maryland, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.