Clean Water Act discharge permit · NPDES MS0020303
HATTIESBURG SOUTH LAGOON, Hattiesburg, MS: NPDES MS0020303 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 14Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
HATTIESBURG SOUTH LAGOON holds NPDES permit MS0020303, which discharges to Directly Into Leaf River. EPA’s file records it issued November 12, 2020 and expiring October 31, 2025. 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 | HATTIESBURG SOUTH LAGOON |
|---|---|
| Permittee as filed | HATTIESBURG SOUTH LAGOON |
| NPDES ID | MS0020303 |
| 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 | November 12, 2020 |
| Expiration date | October 31, 2025 |
| Issuing agency | MDEQ |
| Address | Hattiesburg, MS 39401 |
| Receiving water | DIRECTLY INTO LEAF RIVER |
| Subwatershed | Lotts Creek-Leaf River (HUC 031700050601) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 15Pollutants on file
- 14Under a numeric limit
- 12With a violation of any kind
- 9With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 8 | 118 | 86 | October 31, 2024 | 15,960% over the limit |
| Solids, suspended percent removal | 1 | 74 | 74 | July 31, 2026 | 325% over the limit |
| Coliform, fecal general | 0 | 33 | 25 | January 31, 2015 | 3,900% over the limit |
| Nitrogen, ammonia total [as N] | 8 | 25 | 25 | April 30, 2026 | 295% over the limit |
| Solids, total suspended | 8 | 55 | 23 | October 31, 2023 | 36% over the limit |
| Chlorine, total residual | 2 | 27 | 19 | February 28, 2017 | 222% over the limit |
| BOD, 5-day, percent removal | 1 | 11 | 7 | November 30, 2024 | 76% over the limit |
| E. coli | 2 | 7 | 7 | December 31, 2025 | 490% over the limit |
| pH | 2 | 15 | 5 | September 30, 2016 | |
| Nitrogen, total [as N] | 8 | 8 | 0 | ||
| Phosphorus, total [as P] | 8 | 8 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 5 | 0 | ||
| Nitrogen, nitrate total [as N] | 2 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 2 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 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
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| August 7, 2026 | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | ST6 |
| July 21, 2026 | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | ST6 |
| June 16, 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
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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 MS0020303 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.