Clean Water Act discharge permit · NPDES TX0120146
TENASKA FRONTIER GENERATING STATION, Shiro, TX: NPDES TX0120146 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 25Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
TENASKA FRONTIER GENERATING STATION, held by TENASKA FRONTIER PARTNERS LTD, holds NPDES permit TX0120146, which discharges to Navasota River Below Lake Limestone. EPA’s file records it issued January 24, 2020 and expiring January 24, 2025. 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 | TENASKA FRONTIER GENERATING STATION |
|---|---|
| Permittee as filed | TENASKA FRONTIER PARTNERS LTD |
| NPDES ID | TX0120146 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | January 24, 2020 |
| Expiration date | January 24, 2025 |
| Address | Shiro, TX 77876 |
| Receiving water | Navasota River Below Lake Limestone |
| Subwatershed | Middle Gibbons Creek (HUC 120701030705) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 26Pollutants on file
- 25Under a numeric limit
- 20With a violation of any kind
- 3With 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 |
|---|---|---|---|---|---|
| Iron, total [as Fe] | 2 | 9 | 3 | May 31, 2024 | 80% over the limit |
| pH | 4 | 15 | 2 | September 30, 2017 | |
| Zinc, total [as Zn] | 4 | 8 | 2 | December 31, 2019 | 34% over the limit |
| Nitrogen, nitrate total [as N] | 1 | 20 | 0 | ||
| LOAEC Lethal Static Renewal 48HR Acute Daphnia pulex | 4 | 18 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 12 | 0 | ||
| Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex | 4 | 10 | 0 | ||
| NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex | 4 | 10 | 0 | ||
| LOAEC Lethal Survival Static Renewal 48Hr Acute Pimephales promelas | 4 | 10 | 0 | ||
| Oil & Grease | 2 | 9 | 0 | ||
| Solids, total suspended | 2 | 7 | 0 | ||
| Copper, total [as Cu] | 4 | 6 | 0 | ||
| Chlorine, free available | 2 | 6 | 0 | ||
| Solids, total dissolved | 1 | 5 | 0 | ||
| LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | 4 | 4 | 0 | ||
| NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas | 4 | 4 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute D. Pulex | 1 | 3 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | 1 | 3 | 0 | ||
| Sulfate, total [as SO4] | 2 | 2 | 0 | ||
| Coliform, fecal general | 0 | 2 | 0 | ||
| Whole effluent toxicity - retest #1 | 7 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 7 | 0 | 0 | ||
| Chromium, total [as Cr] | 2 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 0 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 0 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 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
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| April 10, 2018 | Permit Violations - Violation Specified in Comment | ST6 |
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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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 TX0120146 there.
Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.