Clean Water Act discharge permit · NPDES MS0035165
MCLAIN POTW, Mclain, MS: NPDES MS0035165 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 9Pollutants under a numeric limit
- 11Pollutants with an effluent exceedance
MCLAIN POTW holds NPDES permit MS0035165, which discharges to Unnamed Trib Of Mcswain Creek. EPA’s file records it issued October 7, 2019 and expiring September 30, 2024. 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 | MCLAIN POTW |
|---|---|
| Permittee as filed | MCLAIN POTW |
| NPDES ID | MS0035165 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | October 7, 2019 |
| Expiration date | September 30, 2024 |
| Issuing agency | MDEQ |
| Address | Mclain, MS 39456 |
| Receiving water | UNNAMED TRIB OF MCSWAIN CREEK |
| Subwatershed | Little Creek-Leaf River (HUC 031700050902) |
| 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
- 11Pollutants on file
- 9Under a numeric limit
- 11With a violation of any kind
- 11With 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 |
|---|---|---|---|---|---|
| Chlorine, total residual | 2 | 34 | 26 | December 31, 2025 | 12,532% over the limit |
| Solids, total suspended | 8 | 62 | 22 | December 31, 2025 | 461% over the limit |
| BOD, 5-day, 20 deg. C | 8 | 55 | 15 | December 31, 2025 | 330% over the limit |
| Nitrogen, ammonia total [as N] | 10 | 47 | 13 | December 31, 2025 | 367% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 19 | 10 | December 31, 2024 | 1,400% over the limit |
| pH | 2 | 13 | 5 | December 31, 2019 | |
| BOD, 5-day, percent removal | 1 | 10 | 5 | December 31, 2025 | 257% over the limit |
| Coliform, fecal general | 0 | 20 | 4 | December 31, 2016 | 450% over the limit |
| Oxygen, dissolved [DO] | 1 | 7 | 2 | December 31, 2016 | 43% over the limit |
| E. coli | 2 | 2 | 2 | December 31, 2023 | 384% over the limit |
| Solids, suspended percent removal | 0 | 1 | 1 | December 31, 2005 | 9% over the limit |
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 MS0035165.
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, MS0035165.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
How we handle your data → Privacy
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 MS0035165 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.