Clean Water Act discharge permit · NPDES MD3223N07
TRIADELPHIA RIDGE ELEMENTARY SCHOOL AND FOLLY QUARTER MIDDLE SCHOOL NO. 3, Ellicott City, MD: NPDES MD3223N07 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 13Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
TRIADELPHIA RIDGE ELEMENTARY SCHOOL AND FOLLY QUARTER MIDDLE SCHOOL NO. 3, held by HOWARD COUNTY PUBLIC SCHOOL SYSTEM, holds NPDES permit MD3223N07, which discharges to Middle Patuxent River. EPA’s file records it issued December 18, 2020 and expiring December 31, 2025. 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 | TRIADELPHIA RIDGE ELEMENTARY SCHOOL AND FOLLY QUARTER MIDDLE SCHOOL NO. 3 |
|---|---|
| Permittee as filed | HOWARD COUNTY PUBLIC SCHOOL SYSTEM |
| NPDES ID | MD3223N07 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | State-issued individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | December 18, 2020 |
| Expiration date | December 31, 2025 |
| Issuing agency | MD DEPARTMENT OF THE ENVIRONMENT |
| Address | Ellicott City, MD 21042 |
| Receiving water | MIDDLE PATUXENT RIVER |
| Subwatershed | Benson Branch-Middle Patuxent River (HUC 020600060201) |
| SIC | 8211 – Elementary And Secondary Schools |
| Other EPA IDs (FRS) | ICIS-AIR source MD0000002402700474 |
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
- 17Pollutants on file
- 13Under a numeric limit
- 16With 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 |
|---|---|---|---|---|---|
| Coliform, fecal general | 7 | 34 | 21 | December 31, 2025 | 2,147,483,650% over the limit |
| Solids, total dissolved | 7 | 15 | 6 | December 31, 2018 | 158% over the limit |
| Chloride [as Cl] | 7 | 12 | 6 | December 31, 2018 | 158% over the limit |
| Nitrogen, total [as N] | 9 | 24 | 3 | December 31, 2025 | 786% over the limit |
| BOD, 5-day, 20 deg. C | 1 | 5 | 2 | December 31, 2017 | 127% over the limit |
| Nitrogen, nitrate total [as N] | 7 | 20 | 1 | December 31, 2016 | 66% over the limit |
| Solids, total suspended | 1 | 3 | 1 | March 31, 2011 | 567% over the limit |
| Nitrogen, ammonia total [as N] | 0 | 37 | 0 | ||
| Nitrogen, organic total [as N] | 0 | 36 | 0 | ||
| Nitrogen, nitrite total [as N] | 7 | 13 | 0 | ||
| pH | 6 | 12 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 7 | 9 | 0 | ||
| Phosphate, total [as PO4] | 6 | 6 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 4 | 0 | ||
| Phosphorus, total [as P] | 0 | 3 | 0 | ||
| Chloride | 0 | 3 | 0 | ||
| Nitrite + Nitrate total [as N] | 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 MD3223N07.
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 MD3223N07 there.
Nearby on the register
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- Every permit record in Ellicott City, 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.