Clean Water Act discharge permit · NPDES MS0030333
HCUA, WEST BILOXI POTW, Biloxi, MS: NPDES MS0030333 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 14Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
HCUA, WEST BILOXI POTW, held by HARRISON CO UTILITY AUTHORITY, WEST BILOXI POTW, holds NPDES permit MS0030333, which discharges to Directly Into Back Bay Of Biloxi. EPA’s file records it issued April 23, 2018 and expiring March 31, 2023. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | HCUA, WEST BILOXI POTW |
|---|---|
| Permittee as filed | HARRISON CO UTILITY AUTHORITY, WEST BILOXI POTW |
| NPDES ID | MS0030333 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | April 23, 2018 |
| Expiration date | March 31, 2023 |
| Issuing agency | MDEQ |
| Address | Biloxi, MS 39531 |
| Receiving water | DIRECTLY INTO BACK BAY OF BILOXI |
| Subwatershed | Back Bay of Biloxi (HUC 031700090605) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 16Pollutants on file
- 14Under a numeric limit
- 15With 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 |
|---|---|---|---|---|---|
| Oxygen, dissolved [DO] | 3 | 7 | 1 | June 30, 2025 | 2% over the limit |
| Nitrogen, ammonia total [as N] | 12 | 16 | 0 | ||
| Solids, total suspended | 8 | 16 | 0 | ||
| Nitrogen, total [as N] | 8 | 16 | 0 | ||
| Phosphorus, total [as P] | 8 | 16 | 0 | ||
| BOD, carbonaceous [5 day, 5 C] | 8 | 16 | 0 | ||
| Chemical Oxygen Demand [COD] | 0 | 8 | 0 | ||
| Chlorine, total residual | 2 | 6 | 0 | ||
| pH | 2 | 4 | 0 | ||
| Enterococci: group D, MF trans, M-E, EIA | 2 | 4 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 4 | 0 | ||
| Sludge settleability 30 minute | 2 | 4 | 0 | ||
| Carbonaceous oxygen demand, % removal | 1 | 4 | 0 | ||
| Coliform, fecal general | 0 | 4 | 0 | ||
| Solids, suspended percent removal | 1 | 2 | 0 | ||
| Copper, total recoverable | 4 | 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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| August 2, 2026 | Dry-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | ST6 |
| June 18, 2026 | Wet-weather SSO, no discharge to waters of the U.S., that may endanger health or the environment | ST6 |
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
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MS0030333.
Start the watch
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- One watershed — $2,990/year
- One state — $4,990/year
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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 MS0030333 there.
Nearby on the register
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- Every permit record in Mississippi, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.