Clean Water Act discharge permit · NPDES TN0075868
CITY OF SPRING HILL STP, Spring Hill, TN: NPDES TN0075868 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 19Pollutants under a numeric limit
- 16Pollutants with an effluent exceedance
CITY OF SPRING HILL STP, held by City of Spring Hill, holds NPDES permit TN0075868, which discharges to Duck-Lower. EPA’s file records it issued December 28, 2018 and expiring December 31, 2023. 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 | CITY OF SPRING HILL STP |
|---|---|
| Permittee as filed | City of Spring Hill |
| NPDES ID | TN0075868 |
| 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 | December 28, 2018 |
| Expiration date | December 31, 2023 |
| Issuing agency | TDEC - DWR |
| Address | Spring Hill, TN 37174 |
| Receiving water | Duck-Lower |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Rutherford Creek Upper (HUC 060400030201) |
| 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
- 26Pollutants on file
- 19Under a numeric limit
- 22With a violation of any kind
- 16With 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 | 86 | 84 | December 31, 2023 | 582% over the limit |
| Nitrogen, total [as N] | 3 | 68 | 67 | September 30, 2025 | 293% over the limit |
| SSO, Dry Weather | 3 | 23 | 17 | September 30, 2025 | 2,147,483,650% over the limit |
| Coliform, fecal MF, MFC broth, 44.5 C | 0 | 8 | 8 | January 31, 2009 | 330% over the limit |
| Solids, total suspended | 7 | 7 | 7 | February 28, 2022 | 84% over the limit |
| SSO, Wet Weather | 3 | 6 | 6 | January 31, 2026 | 2,147,483,650% over the limit |
| IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubia | 1 | 8 | 5 | March 31, 2010 | 99,999% over the limit |
| IC25 Static Renewal 7 Day Chronic Chrpimephales | 1 | 5 | 4 | March 31, 2017 | 99,999% over the limit |
| Solids, settleable | 1 | 4 | 4 | October 31, 2025 | 1,200% over the limit |
| E. coli | 6 | 3 | 3 | March 31, 2025 | 18% over the limit |
| E. coli, MTEC-MF | 0 | 3 | 3 | July 31, 2009 | 157% over the limit |
| pH | 2 | 2 | 2 | December 31, 2004 | |
| Oxygen, dissolved [DO] | 1 | 2 | 2 | January 31, 2017 | 7% over the limit |
| Cyanide, total [as CN] | 0 | 2 | 2 | February 28, 2010 | 31% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 12 | 1 | 1 | September 30, 2011 | 50% over the limit |
| BOD, carbonaceous, percent removal | 2 | 1 | 1 | April 30, 2015 | 51% over the limit |
| Phosphorus, total [as P] | 3 | 3 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 0 | 3 | 0 | ||
| Nitrite + Nitrate total [as N] | 0 | 3 | 0 | ||
| Phosphate, ortho [as PO4] | 0 | 3 | 0 | ||
| Overflows | 0 | 3 | 0 | ||
| Flow, in conduit or thru treatment plant | 6 | 2 | 0 | ||
| Release [Sewer], Dry Weather | 2 | 0 | 0 | ||
| Release [Sewer], Wet Weather | 2 | 0 | 0 | ||
| Bypass of Treatment Facility | 2 | 0 | 0 | ||
| Solids, suspended 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 TN0075868.
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.
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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 TN0075868 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.