Clean Water Act discharge permit · NPDES MDG766176
HAWTHORN POOL, Columbia, MD: NPDES MDG766176 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
HAWTHORN POOL, held by COLUMBIA ASSOCIATION, holds NPDES permit MDG766176, which discharges to Little Patuxent River. EPA’s file records it issued September 20, 2023 and expiring January 31, 2028. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | HAWTHORN POOL |
|---|---|
| Permittee as filed | COLUMBIA ASSOCIATION |
| NPDES ID | MDG766176 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | September 20, 2023 |
| Expiration date | January 31, 2028 |
| Issuing agency | MARYLAND DEPARTMENT OF THE ENVIRONMENT |
| Address | Columbia, MD 21044 |
| Receiving water | LITTLE PATUXENT RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Dorsey Run-Little Patuxent River (HUC 020600060202) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 5Pollutants on file
- 0Under a numeric limit
- 5With a violation of any kind
- 1With 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 |
|---|---|---|---|---|---|
| pH | 0 | 37 | 7 | September 30, 2007 | |
| Flow, in conduit or thru treatment plant | 0 | 80 | 0 | ||
| Chlorine, total residual | 0 | 30 | 0 | ||
| Turbidity | 0 | 20 | 0 | ||
| Cyanuric acid | 0 | 20 | 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 MDG766176.
Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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 MDG766176 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.