Clean Water Act discharge permit · NPDES MDG767058
CONOWINGO POOL, Darlington, MD: NPDES MDG767058 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
CONOWINGO POOL, held by CONSTELLATION ENERGY GENERATION, LLC, holds NPDES permit MDG767058, which discharges to Lower Susquehanna River. EPA’s file records it issued June 15, 2010 and expiring May 13, 2012. 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 | CONOWINGO POOL |
|---|---|
| Permittee as filed | CONSTELLATION ENERGY GENERATION, LLC |
| NPDES ID | MDG767058 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | June 15, 2010 |
| Expiration date | May 13, 2012 |
| Issuing agency | MDE |
| Address | Darlington, MD 21034 |
| Receiving water | LOWER SUSQUEHANNA RIVER |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 4Pollutants on file
- 0Under a numeric limit
- 4With a violation of any kind
- 0With 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 | 4 | 0 | ||
| Flow | 0 | 4 | 0 | ||
| Chlorine, total residual | 0 | 1 | 0 | ||
| Cyanuric acid | 0 | 1 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MDG767058.
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 MDG767058.
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 MDG767058 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.