Clean Water Act discharge permit · NPDES TN0020711
MEMPHIS - MAYNARD C. STILES STP, Memphis, TN: NPDES TN0020711 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 14Pollutants under a numeric limit
- 9Pollutants with an effluent exceedance
MEMPHIS - MAYNARD C. STILES STP, held by M C STILES WASTEWASTER, holds NPDES permit TN0020711, which discharges to Mississippi Rv. EPA’s file records it issued April 1, 2000 and expiring March 31, 2005. 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 | MEMPHIS - MAYNARD C. STILES STP |
|---|---|
| Permittee as filed | M C STILES WASTEWASTER |
| NPDES ID | TN0020711 |
| 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 1, 2000 |
| Expiration date | March 31, 2005 |
| Address | Memphis, TN 38127 |
| Receiving water | MISSISSIPPI RV |
| Subwatershed | Loosahatchie Bar-Mississippi River (HUC 080101000703) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 28Pollutants on file
- 14Under a numeric limit
- 28With 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 | 7 | 158 | 138 | May 31, 2026 | 176% over the limit |
| BOD, 5-day, percent removal | 2 | 60 | 52 | September 30, 2025 | 273% over the limit |
| Solids, suspended percent removal | 2 | 41 | 35 | September 30, 2025 | 280% over the limit |
| Solids, total suspended | 7 | 55 | 32 | September 30, 2025 | 12,032% over the limit |
| Solids, settleable | 1 | 12 | 9 | September 30, 2025 | 4,900% over the limit |
| Chlordane | 0 | 10 | 8 | March 31, 2016 | 394% over the limit |
| Polychlorinated biphenyls [PCBs] | 0 | 8 | 6 | July 31, 2017 | 1,275% over the limit |
| DDT | 1 | 5 | 4 | December 31, 2021 | 3,900% over the limit |
| Dieldrin | 1 | 4 | 3 | December 31, 2020 | 2,757% over the limit |
| Flow, in conduit or thru treatment plant | 2 | 16 | 0 | ||
| Overflows | 2 | 10 | 0 | ||
| Bypass valve | 2 | 7 | 0 | ||
| Nitrogen, total [as N] | 0 | 7 | 0 | ||
| Phosphorus, total [as P] | 0 | 7 | 0 | ||
| pH | 2 | 6 | 0 | ||
| E. coli | 0 | 5 | 0 | ||
| Dioxin | 1 | 3 | 0 | ||
| Organic pesticide chemicals [40 CFR455] | 1 | 3 | 0 | ||
| Nitrogen, ammonia total [as N] | 0 | 3 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 2 | 0 | ||
| Benzidine | 0 | 2 | 0 | ||
| Hexachlorobenzene | 0 | 2 | 0 | ||
| Mercury, total [as Hg] | 0 | 2 | 0 | ||
| Methylmercury | 0 | 2 | 0 | ||
| Chlorine, total residual | 0 | 1 | 0 | ||
| Sewer Backups | 0 | 1 | 0 | ||
| LC50 Static 48Hr Acute Ceriodaphnia dubia | 0 | 1 | 0 | ||
| LC50 Static 48Hr Acute Pimephales promelas | 0 | 1 | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES TN0020711.
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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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 TN0020711 there.
Nearby on the register
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- Every permit record in Tennessee, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.