Clean Water Act discharge permit · NPDES TN0027278
LIMESTONE WATER UTILITY OPERATING COMPANY - GRASSLANDS STP, Franklin, TN: NPDES TN0027278 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 15Pollutants under a numeric limit
- 16Pollutants with an effluent exceedance
LIMESTONE WATER UTILITY OPERATING COMPANY - GRASSLANDS STP, held by Limestone Water Utility Operating Company, LLC, holds NPDES permit TN0027278, which discharges to Harpeth. EPA’s file records it issued August 30, 2021 and expiring November 30, 2026. 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 | LIMESTONE WATER UTILITY OPERATING COMPANY - GRASSLANDS STP |
|---|---|
| Permittee as filed | Limestone Water Utility Operating Company, LLC |
| NPDES ID | TN0027278 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | August 30, 2021 |
| Expiration date | November 30, 2026 |
| Issuing agency | TDEC - DWR |
| Address | Franklin, TN 37069 |
| Receiving water | Harpeth |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Harpeth River-Cartwright Creek (HUC 051302040602) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 20Pollutants on file
- 15Under a numeric limit
- 20With 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 |
|---|---|---|---|---|---|
| BOD, carbonaceous [5 day, 20 C] | 12 | 194 | 177 | February 28, 2026 | 5,406% over the limit |
| Nitrogen, ammonia total [as N] | 10 | 107 | 88 | February 28, 2026 | 184,900% over the limit |
| Solids, total suspended | 7 | 93 | 75 | July 31, 2026 | 753% over the limit |
| Solids, suspended percent removal | 2 | 77 | 70 | July 31, 2026 | 370% over the limit |
| Nitrogen, total [as N] | 5 | 69 | 63 | July 31, 2026 | 10,433% over the limit |
| Carbonaceous oxygen demand, % removal | 0 | 63 | 57 | June 30, 2018 | 400% over the limit |
| Solids, settleable | 1 | 17 | 12 | July 31, 2026 | 9,900% over the limit |
| Oxygen, dissolved [DO] | 1 | 11 | 9 | May 31, 2025 | 100% over the limit |
| SSO, Wet Weather | 1 | 10 | 9 | May 31, 2026 | 2,147,483,650% over the limit |
| BOD, carbonaceous, percent removal | 2 | 9 | 7 | May 31, 2025 | 81% over the limit |
| Chlorine, total residual | 2 | 15 | 6 | January 31, 2026 | 99,999% over the limit |
| Phosphorus, total [as P] | 5 | 14 | 5 | February 28, 2026 | 203,106% over the limit |
| SSO, Dry Weather | 1 | 6 | 5 | December 31, 2025 | 2,147,483,650% over the limit |
| pH | 2 | 5 | 1 | December 31, 2024 | |
| E. coli | 2 | 5 | 1 | April 30, 2023 | 7% over the limit |
| Coliform, fecal MF, MFC broth, 44.5 C | 0 | 3 | 1 | April 30, 2007 | 210% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 12 | 0 | ||
| Overflows | 0 | 10 | 0 | ||
| Bypass valve | 0 | 5 | 0 | ||
| E. coli, MTEC-MF | 0 | 2 | 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 TN0027278.
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, TN0027278.
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 TN0027278 there.
Nearby on the register
- Discharge permits in Franklin
- Every permit record in Franklin, 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.