Clean Water Act discharge permit · NPDES TN0020508
DECHERD WATER WORKS STP, Decherd, TN: NPDES TN0020508 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 18Pollutants under a numeric limit
- 19Pollutants with an effluent exceedance
DECHERD WATER WORKS STP, held by City of Decherd, holds NPDES permit TN0020508, which discharges to Elk-Upper. EPA’s file records it issued May 23, 2022 and expiring June 30, 2027. 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 | DECHERD WATER WORKS STP |
|---|---|
| Permittee as filed | City of Decherd |
| NPDES ID | TN0020508 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | May 23, 2022 |
| Expiration date | June 30, 2027 |
| Issuing agency | TDEC - DWR |
| Address | Decherd, TN 37324 |
| Receiving water | Elk-Upper |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Boiling Fork Creek (HUC 060300030303) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 27Pollutants on file
- 18Under a numeric limit
- 25With a violation of any kind
- 19With 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 |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 10 | 130 | 130 | February 29, 2024 | 129,423% over the limit |
| Phosphorus, total [as P] | 3 | 42 | 39 | October 31, 2025 | 7,248% over the limit |
| IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubia | 1 | 36 | 28 | August 31, 2024 | 97% over the limit |
| Solids, suspended percent removal | 2 | 28 | 28 | October 31, 2023 | 247% over the limit |
| Solids, total suspended | 7 | 25 | 25 | July 31, 2023 | 229% over the limit |
| Nitrogen, total [as N] | 3 | 28 | 20 | October 31, 2016 | 144% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 7 | 19 | 19 | September 30, 2023 | 53% over the limit |
| IC25 Static Renewal 7 Day Chronic Chrpimephales | 1 | 20 | 14 | June 30, 2020 | 96% over the limit |
| Oxygen, dissolved [DO] | 1 | 8 | 8 | March 31, 2020 | 67% over the limit |
| Nitrite + Nitrate total [as N] | 0 | 17 | 6 | October 31, 2016 | 156% over the limit |
| SSO, Wet Weather | 1 | 6 | 5 | February 29, 2024 | 2,147,483,650% over the limit |
| E. coli | 2 | 5 | 5 | April 30, 2020 | 1,820% over the limit |
| Carbonaceous oxygen demand, % removal | 0 | 3 | 3 | September 30, 2012 | 358% over the limit |
| IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 0 | 4 | 2 | March 31, 2026 | 80% over the limit |
| SSO, Dry Weather | 1 | 2 | 2 | November 30, 2023 | 2,147,483,650% over the limit |
| E. coli, MTEC-MF | 0 | 2 | 2 | July 31, 2012 | 11% over the limit |
| pH | 2 | 1 | 1 | November 30, 2020 | |
| Solids, settleable | 1 | 1 | 1 | January 31, 2016 | 900% over the limit |
| Lead, total [as Pb] | 1 | 1 | 1 | March 31, 2024 | 76% over the limit |
| Cyanide, total [as CN] | 1 | 10 | 0 | ||
| Chromium, hexavalent [as Cr] | 0 | 10 | 0 | ||
| Naphthalene | 0 | 10 | 0 | ||
| Mercury, total [as Hg] | 0 | 10 | 0 | ||
| Di[2-ethylhexyl] phthalate [DEHP] | 0 | 4 | 0 | ||
| Overflows | 0 | 1 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 0 | 0 | ||
| BOD, carbonaceous, percent removal | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES TN0020508.
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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Start the watch
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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 TN0020508 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.