Clean Water Act discharge permit · NPDES MD0020524
LA PLATA WWTP, La Plata, MD: NPDES MD0020524 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 19Pollutants under a numeric limit
- 13Pollutants with an effluent exceedance
LA PLATA WWTP holds NPDES permit MD0020524, which discharges to Unnamed Trib. Of Port Tabacco Ck. EPA’s file records it issued March 18, 2016 and expiring March 31, 2021. 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 | LA PLATA WWTP |
|---|---|
| Permittee as filed | LA PLATA WWTP |
| NPDES ID | MD0020524 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | March 18, 2016 |
| Expiration date | March 31, 2021 |
| Issuing agency | MD DEPARTMENT OF THE ENVIRONMENT |
| Address | La Plata, MD 20646 |
| Receiving water | UNNAMED TRIB. OF PORT TABACCO CK |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Port Tobacco River (HUC 020700110304) |
| SIC | 4952 – Sewerage Systems |
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
- 39Pollutants on file
- 19Under a numeric limit
- 37With a violation of any kind
- 13With 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 |
|---|---|---|---|---|---|
| Hardness, total [as CaCO3] | 6 | 103 | 103 | August 31, 2023 | 68% over the limit |
| Nitrogen, ammonia total [as N] | 8 | 88 | 86 | June 30, 2026 | 348% over the limit |
| Phosphorus, total [as P] | 8 | 64 | 60 | July 31, 2026 | 6,234% over the limit |
| Solids, total suspended | 8 | 40 | 36 | December 31, 2023 | 202% over the limit |
| Coliform, fecal general | 1 | 31 | 31 | June 30, 2026 | 3,650% over the limit |
| Copper, total recoverable | 4 | 26 | 26 | May 31, 2025 | 794% over the limit |
| BOD, 5-day, 20 deg. C | 8 | 27 | 23 | August 31, 2023 | 109% over the limit |
| Nitrogen, total [as N] | 8 | 24 | 23 | December 31, 2025 | 7,016% over the limit |
| Zinc, total recoverable | 4 | 10 | 10 | June 30, 2013 | 122% over the limit |
| Oxygen, dissolved [DO] | 1 | 10 | 9 | June 30, 2026 | 9% over the limit |
| pH | 2 | 6 | 4 | November 30, 2021 | |
| Nitrogen, Kjeldahl, total [as N] | 0 | 4 | 4 | June 30, 2002 | 113% over the limit |
| BOD, 5-day, percent removal | 0 | 1 | 1 | April 30, 2025 | 17% over the limit |
| Polychlorinated biphenyls [PCBs] | 4 | 88 | 0 | ||
| Arsenic, total recoverable | 0 | 3 | 0 | ||
| Thallium, total recoverable | 0 | 3 | 0 | ||
| Cadmium, total recoverable | 0 | 3 | 0 | ||
| Nitrogen, organic total [as N] | 1 | 2 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 2 | 0 | ||
| Acrolein | 0 | 2 | 0 | ||
| Benzo[k]fluoranthene | 0 | 2 | 0 | ||
| Benzo[a]pyrene | 0 | 2 | 0 | ||
| Chrysene | 0 | 2 | 0 | ||
| Indeno[1,2,3-cd]pyrene | 0 | 2 | 0 | ||
| Benzo[a]anthracene | 0 | 2 | 0 | ||
| Dibenzo[a,h]anthracene, dry weight | 0 | 2 | 0 | ||
| Benzidine | 0 | 2 | 0 | ||
| 4,4'-DDT | 0 | 2 | 0 | ||
| Toxaphene | 0 | 2 | 0 | ||
| Heptachlor | 0 | 2 | 0 | ||
| Chlordane | 0 | 2 | 0 | ||
| Heptachlor + Heptachlor Epoxide | 0 | 2 | 0 | ||
| Phosphorous, in total orthophosphate | 0 | 2 | 0 | ||
| 3,4-Benzofluoranthene | 0 | 2 | 0 | ||
| Flow, total | 3 | 1 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 1 | 0 | ||
| Chlorine, total residual | 1 | 1 | 0 | ||
| Phosphate, ortho [as P] | 1 | 0 | 0 | ||
| Flow | 1 | 0 | 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 MD0020524.
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 MD0020524 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.