Clean Water Act discharge permit · NPDES MS0033961
RIENZI POTW, Rienzi, MS: NPDES MS0033961 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 13Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
RIENZI POTW holds NPDES permit MS0033961, which discharges to Tuscumbia River. EPA’s file records it issued January 11, 2017 and expiring December 31, 2021. 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 | RIENZI POTW |
|---|---|
| Permittee as filed | RIENZI POTW |
| NPDES ID | MS0033961 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | January 11, 2017 |
| Expiration date | December 31, 2021 |
| Issuing agency | MDEQ |
| Address | Rienzi, MS 33961 |
| Receiving water | TUSCUMBIA RIVER |
| Subwatershed | Moores Creek-Tuscumbia River Canal (HUC 080102070303) |
| Program components on file | POTW, Pretreatment |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 14Pollutants on file
- 13Under a numeric limit
- 14With a violation of any kind
- 8With 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 | 39 | 7 | September 30, 2025 | 64% over the limit |
| Nitrogen, ammonia total [as N] | 8 | 39 | 7 | March 31, 2024 | 820% over the limit |
| Solids, suspended percent removal | 1 | 9 | 6 | September 30, 2025 | 360% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 13 | 5 | June 30, 2024 | 47% over the limit |
| BOD, 5-day, percent removal | 1 | 8 | 5 | March 31, 2020 | 173% over the limit |
| Oxygen, dissolved [DO] | 3 | 20 | 3 | September 30, 2011 | 8% over the limit |
| Coliform, fecal general | 2 | 8 | 2 | December 31, 2014 | 50% over the limit |
| Chlorine, total residual | 2 | 9 | 1 | March 31, 2012 | 12% over the limit |
| Solids, total suspended | 8 | 41 | 0 | ||
| Phosphorus, total [as P] | 4 | 25 | 0 | ||
| pH | 2 | 10 | 0 | ||
| Nitrogen, total [as N] | 4 | 8 | 0 | ||
| Sludge settleability 30 minute | 2 | 8 | 0 | ||
| E. coli | 0 | 2 | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 21, 2026 | Dry-weather SSO, no discharge to waters of the U.S., not permit compliant, no endangerment | 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 MS0033961 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 October 14, 2026.