Clean Water Act discharge permit · NPDES MDG490025
UNITED STATES GYPSUM COMPANY, Baltimore, MD: NPDES MDG490025 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 4Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
UNITED STATES GYPSUM COMPANY holds NPDES permit MDG490025. EPA’s file records it issued April 1, 2022 and expiring April 30, 2027. 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 | UNITED STATES GYPSUM COMPANY |
|---|---|
| Permittee as filed | UNITED STATES GYPSUM COMPANY |
| NPDES ID | MDG490025 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | April 1, 2022 |
| Expiration date | April 30, 2027 |
| Issuing agency | MARYLAND DEPARTMENT OF THE ENVIORMENT |
| Address | Baltimore, MD 21226 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Northwest Harbor-Patapsco River (HUC 020600031203) |
| Other EPA IDs (FRS) | RCRA handler MDR000010744; ICIS-AIR source MD0000002451000106 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 4Pollutants on file
- 4Under 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 | 8 | 120 | 0 | ||
| Solids, total suspended | 7 | 72 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 60 | 0 | ||
| Oil and grease | 2 | 30 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MDG490025.
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 MDG490025.
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 MDG490025 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.