Clean Water Act discharge permit · NPDES MD0052680
NVA PROPERTIES, LLC WWTP (HENSON VALLEY MONTESSORI SCHOOL, INC.), Upper Marlboro, MD: NPDES MD0052680 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 8Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
NVA PROPERTIES, LLC WWTP (HENSON VALLEY MONTESSORI SCHOOL, INC.), held by EDGEMEADE ROAD RE., LLC, holds NPDES permit MD0052680, which discharges to Pauxent River Tributary. EPA’s file records it issued August 1, 2017 and expiring August 31, 2022. 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.
Identity
| Facility as filed | NVA PROPERTIES, LLC WWTP (HENSON VALLEY MONTESSORI SCHOOL, INC.) |
|---|---|
| Permittee as filed | EDGEMEADE ROAD RE., LLC |
| NPDES ID | MD0052680 |
| 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 | August 1, 2017 |
| Expiration date | August 31, 2022 |
| Issuing agency | MARYLAND DEPARTMENT OF THE ENVIRONMENT |
| Address | Upper Marlboro, MD 20772 |
| Receiving water | PAUXENT RIVER TRIBUTARY |
| Subwatershed | Mataponi Creek-Patuxent River (HUC 020600060502) |
| SIC | 8299 – Schools & Educational Services |
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
- 10Pollutants on file
- 8Under a numeric limit
- 10With a violation of any kind
- 7With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 8 | 144 | 8 | January 31, 2009 | 683% over the limit |
| Flow, in conduit or thru treatment plant | 1 | 41 | 5 | November 30, 1997 | 7,900% over the limit |
| BOD, 5-day, 20 deg. C | 8 | 150 | 4 | May 31, 2002 | 173% over the limit |
| Nitrogen, Kjeldahl, total [as N] | 0 | 7 | 4 | May 31, 2002 | 131% over the limit |
| Solids, total suspended | 4 | 148 | 2 | October 31, 2003 | 68% over the limit |
| Chlorine, total residual | 1 | 38 | 2 | January 31, 2024 | 1,660% over the limit |
| Oxygen, dissolved [DO] | 1 | 37 | 1 | April 30, 1999 | 100% over the limit |
| pH | 2 | 72 | 0 | ||
| E. coli | 1 | 31 | 0 | ||
| Coliform, fecal general | 0 | 22 | 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 MD0052680.
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 MD0052680 there.
Nearby on the register
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- Every permit record in Maryland, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.