Clean Water Act discharge permit · NPDES MS0021156
PHILADELPHIA POTW, Philadelphia, MS: NPDES MS0021156 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 11Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
PHILADELPHIA POTW holds NPDES permit MS0021156, which discharges to Kentawka Canal. EPA’s file records it issued April 2, 2018 and expiring March 31, 2023. 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 | PHILADELPHIA POTW |
|---|---|
| Permittee as filed | PHILADELPHIA POTW |
| NPDES ID | MS0021156 |
| 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 2, 2018 |
| Expiration date | March 31, 2023 |
| Issuing agency | MDEQ |
| Address | Philadelphia, MS 39350 |
| Receiving water | KENTAWKA CANAL |
| Subwatershed | Lower Kentawka Canal (HUC 031800010504) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 14Pollutants on file
- 11Under a numeric limit
- 13With a violation of any kind
- 7With 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, suspended percent removal | 1 | 14 | 9 | April 30, 2025 | 74% over the limit |
| BOD, 5-day, 20 deg. C | 8 | 56 | 4 | October 31, 2023 | 162% over the limit |
| Solids, total suspended | 8 | 55 | 3 | October 31, 2023 | 67% over the limit |
| pH | 2 | 23 | 3 | April 30, 2026 | |
| Flow, in conduit or thru treatment plant | 4 | 8 | 3 | December 31, 2008 | 53% over the limit |
| Oxygen, dissolved [DO] | 1 | 6 | 1 | October 31, 2018 | 14% over the limit |
| %Effect Static Renewal 7 Day Chronic Ceriodaphnia dubia | 0 | 1 | 1 | September 30, 2023 | 71% over the limit |
| Nitrogen, ammonia total [as N] | 12 | 33 | 0 | ||
| BOD, 5-day, percent removal | 1 | 10 | 0 | ||
| Nitrogen, total [as N] | 12 | 9 | 0 | ||
| Phosphorus, total [as P] | 12 | 9 | 0 | ||
| Coliform, fecal general | 0 | 6 | 0 | ||
| Flow, total | 0 | 5 | 0 | ||
| E. coli | 2 | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 28, 2026 | Dry-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, MS0021156.
Start the watch
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- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/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 MS0021156 there.
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- Every permit record in Mississippi, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.