Clean Water Act discharge permit · NPDES MS0046515
CALGON CARBON CORPORATION, Bay Saint Louis, MS: NPDES MS0046515 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 8Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
CALGON CARBON CORPORATION holds NPDES permit MS0046515, which discharges to Mulatto Bayou. EPA’s file records it issued March 26, 2020 and expiring February 28, 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 | CALGON CARBON CORPORATION |
|---|---|
| Permittee as filed | CALGON CARBON CORPORATION |
| NPDES ID | MS0046515 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | March 26, 2020 |
| Expiration date | February 28, 2025 |
| Issuing agency | MDEQ |
| Address | Bay Saint Louis, MS 39520 |
| Receiving water | MULATTO BAYOU |
| Subwatershed | Mulatto Bayou (HUC 031800041006) |
| NAICS | 325998 – All Other Miscellaneous Chemical Product and Preparation Manufacturing |
| SIC | 2819 – Industrial Inorganic Chemicals |
| Other EPA IDs (FRS) | RCRA handler MSD985973502; ICIS-AIR source MS0000002804500015 |
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
- 8Pollutants on file
- 8Under a numeric limit
- 6With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 2 | 21 | 19 | July 31, 2026 | 142% over the limit |
| pH | 2 | 2 | 0 | ||
| Oil & Grease | 2 | 2 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 2 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 1 | 0 | ||
| Sulfite [as SO3] | 1 | 1 | 0 | ||
| Temperature, water deg. fahrenheit | 1 | 0 | 0 | ||
| Temp. diff. between up/down stream deg. F | 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 MS0046515.
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.
Watch this permit
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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 MS0046515 there.
Nearby on the register
- Discharge permits in Bay Saint Louis
- Every permit record in Bay Saint Louis, A to Z
- Discharge permits in Mississippi
- Every permit record in Mississippi, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.