Clean Water Act discharge permit · NPDES MD0022446
HAMPSTEAD WWTP, Hampstead, MD: NPDES MD0022446 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 18Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
HAMPSTEAD WWTP holds NPDES permit MD0022446, which discharges to Piney Run. EPA’s file records it issued September 13, 2017 and expiring September 30, 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 | HAMPSTEAD WWTP |
|---|---|
| Permittee as filed | HAMPSTEAD WWTP |
| NPDES ID | MD0022446 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | September 13, 2017 |
| Expiration date | September 30, 2022 |
| Issuing agency | MARYLAND DEPARTMENT OF THE ENVIRONMENT |
| Address | Hampstead, MD 21074 |
| Receiving water | PINEY RUN |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Piney Run-Western Run (HUC 020600030403) |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | RCRA handler MDR000506600 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 19Pollutants on file
- 18Under a numeric limit
- 17With a violation of any kind
- 9With 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] | 40 | 307 | 229 | February 28, 2026 | 2,000% over the limit |
| Phosphorus, total [as P] | 37 | 414 | 169 | January 31, 2024 | 2,567% over the limit |
| Temperature, water deg. centigrade | 2 | 76 | 55 | July 31, 2021 | 99,999% over the limit |
| Solids, total suspended | 34 | 211 | 32 | July 31, 2023 | 300% over the limit |
| BOD, 5-day, 20 deg. C | 29 | 89 | 11 | August 31, 2019 | 177% over the limit |
| E. coli | 6 | 19 | 4 | October 31, 2020 | 280% over the limit |
| Coliform, fecal general | 1 | 66 | 2 | June 30, 2017 | 262% over the limit |
| Temperature, length of excursion | 6 | 50 | 2 | August 31, 2022 | 700% over the limit |
| pH | 10 | 40 | 1 | January 31, 2007 | |
| Nitrogen, total [as N] | 19 | 105 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 0 | 87 | 0 | ||
| Flow, in conduit or thru treatment plant | 6 | 21 | 0 | ||
| Oxygen, dissolved [DO] | 5 | 18 | 0 | ||
| Phosphorous, in total orthophosphate | 2 | 10 | 0 | ||
| Nitrogen, organic total [as N] | 5 | 7 | 0 | ||
| Nitrite + Nitrate total [as N] | 5 | 7 | 0 | ||
| Flow, total | 3 | 5 | 0 | ||
| Phosphate, ortho [as P] | 3 | 0 | 0 | ||
| Flow | 3 | 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 MD0022446.
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 MD0022446 there.
Nearby on the register
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- Every permit record in Hampstead, 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.