Clean Water Act discharge permit · NPDES MD0020303
ROCK HALL WWTP, Rock Hall, MD: NPDES MD0020303 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 14Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
ROCK HALL WWTP, held by Kent county Dept. of Water & Wastewater Services, holds NPDES permit MD0020303, which discharges to Chester River Area- Grays Inn Creek. EPA’s file records it issued July 6, 2017 and expiring July 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 | ROCK HALL WWTP |
|---|---|
| Permittee as filed | Kent county Dept. of Water & Wastewater Services |
| NPDES ID | MD0020303 |
| 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 | July 6, 2017 |
| Expiration date | July 31, 2022 |
| Issuing agency | MD DEPARTMENT OF THE ENVIRONMENT |
| Address | Rock Hall, MD 21661 |
| Receiving water | CHESTER RIVER AREA- GRAYS INN CREEK |
| Subwatershed | Lower Chester River (HUC 020600020411) |
| 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
- 17Pollutants on file
- 14Under 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 |
|---|---|---|---|---|---|
| Phosphorus, total [as P] | 6 | 94 | 22 | September 30, 2024 | 1,175% over the limit |
| Coliform, fecal general | 1 | 52 | 20 | May 31, 2026 | 11,329% over the limit |
| Solids, total suspended | 4 | 72 | 7 | October 31, 2010 | 647% over the limit |
| pH | 2 | 37 | 3 | October 31, 2024 | |
| BOD, 5-day, 20 deg. C | 4 | 67 | 2 | October 31, 2010 | 19% over the limit |
| Oxygen, dissolved [DO] | 3 | 23 | 2 | May 31, 2010 | 17% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 37 | 1 | April 30, 2009 | 12% over the limit |
| Chlorine, total residual | 1 | 20 | 1 | February 28, 2005 | 17,900% over the limit |
| Solids, suspended percent removal | 0 | 2 | 1 | December 31, 2025 | 60% over the limit |
| Nitrogen, total [as N] | 4 | 38 | 0 | ||
| Phosphorous, in total orthophosphate | 2 | 35 | 0 | ||
| Nitrogen, organic total [as N] | 2 | 32 | 0 | ||
| Nitrogen, ammonia total [as N] | 2 | 31 | 0 | ||
| Nitrite + Nitrate total [as N] | 2 | 31 | 0 | ||
| Flow, total | 1 | 3 | 0 | ||
| Phosphate, ortho [as P] | 0 | 1 | 0 | ||
| BOD, 5-day, percent removal | 0 | 1 | 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 MD0020303.
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 MD0020303 there.
Nearby on the register
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- Every permit record in Rock Hall, A to Z
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- Every permit record in Maryland, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.