Clean Water Act discharge permit · NPDES TN0021644
COWAN STP, Cowan, TN: NPDES TN0021644 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 15Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
COWAN STP holds NPDES permit TN0021644, which discharges to Boiling Fork Cr. EPA’s file records it issued October 1, 2016 and expiring January 31, 2022. 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 | COWAN STP |
|---|---|
| Permittee as filed | COWAN STP |
| NPDES ID | TN0021644 |
| 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 1, 2016 |
| Expiration date | January 31, 2022 |
| Address | Cowan, TN 37318 |
| Receiving water | BOILING FORK CR |
| Subwatershed | Boiling Fork Creek (HUC 060300030303) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 18Pollutants on file
- 15Under a numeric limit
- 13With 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 |
|---|---|---|---|---|---|
| Solids, suspended percent removal | 2 | 41 | 29 | September 30, 2014 | 555% over the limit |
| Chlorine, total residual | 1 | 26 | 20 | August 31, 2013 | 553,233% over the limit |
| Carbonaceous oxygen demand, % removal | 0 | 32 | 18 | May 31, 2014 | 93% over the limit |
| Solids, total suspended | 7 | 51 | 9 | April 30, 2013 | 744% over the limit |
| Nitrogen, ammonia total [as N] | 10 | 41 | 9 | December 31, 2015 | 270% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 7 | 47 | 5 | May 31, 2014 | 286% over the limit |
| Oxygen, dissolved [DO] | 1 | 8 | 2 | November 30, 2014 | 86% over the limit |
| E. coli, MTEC-MF | 0 | 1 | 1 | August 31, 2013 | 0% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 24 | 0 | ||
| Bypass valve | 1 | 14 | 0 | ||
| pH | 2 | 12 | 0 | ||
| Coliform, fecal MF, MFC broth, 44.5 C | 0 | 12 | 0 | ||
| Solids, settleable | 1 | 6 | 0 | ||
| E. coli | 2 | 0 | 0 | ||
| Overflows | 2 | 0 | 0 | ||
| BOD, carbonaceous, percent removal | 2 | 0 | 0 | ||
| SSO, Dry Weather | 1 | 0 | 0 | ||
| SSO, Wet Weather | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES TN0021644.
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, TN0021644.
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 TN0021644 there.
Nearby on the register
- Discharge permits in Cowan
- Every permit record in Cowan, A to Z
- Discharge permits in Tennessee
- Every permit record in Tennessee, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.