Clean Water Act discharge permit · NPDES TX0058441
DECKER CREEK POWER PLANT, Austin, TX: NPDES TX0058441 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 28Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
DECKER CREEK POWER PLANT, held by AUSTIN, CITY OF, holds NPDES permit TX0058441, which discharges to Walter E Long Lk; Decker Ck;Gilleland Ck;Co Rv Bel. EPA’s file records it issued December 6, 2019 and expiring December 6, 2024. 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 | DECKER CREEK POWER PLANT |
|---|---|
| Permittee as filed | AUSTIN, CITY OF |
| NPDES ID | TX0058441 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | December 6, 2019 |
| Expiration date | December 6, 2024 |
| Address | Austin, TX 78724 |
| Receiving water | WALTER E LONG LK; DECKER CK;GILLELAND CK;CO RV BEL |
| Subwatershed | Decker Creek-Colorado River (HUC 120903010107) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 30Pollutants on file
- 28Under a numeric limit
- 26With a violation of any kind
- 6With 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 |
|---|---|---|---|---|---|
| pH | 8 | 35 | 11 | July 31, 2026 | |
| Flow, in conduit or thru treatment plant | 12 | 42 | 10 | July 31, 2025 | 838% over the limit |
| Solids, total suspended | 8 | 26 | 6 | October 31, 2024 | 960% over the limit |
| Oil & Grease | 8 | 32 | 3 | February 28, 2017 | 38% over the limit |
| Whole effluent toxicity | 0 | 14 | 2 | June 30, 2010 | 25% over the limit |
| Iron, total [as Fe] | 2 | 8 | 2 | April 30, 2002 | 12,200% over the limit |
| Copper, total [as Cu] | 2 | 6 | 0 | ||
| Chlorine, total residual | 2 | 6 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 4 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas | 4 | 4 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 4 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas | 4 | 4 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 4 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas | 4 | 4 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 4 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas | 4 | 4 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 4 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas | 4 | 4 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia | 4 | 4 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas | 4 | 4 | 0 | ||
| Whole effluent toxicity - retest #2 | 7 | 3 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute D. Pulex | 1 | 3 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Pimephales promelas | 1 | 3 | 0 | ||
| Carbon, tot organic [TOC] | 0 | 3 | 0 | ||
| Temperature, water deg. fahrenheit | 2 | 2 | 0 | ||
| Whole effluent toxicity - retest #1 | 7 | 1 | 0 | ||
| Whole Effluent Toxicity [WET] - C. dubia | 8 | 0 | 0 | ||
| Solids, total dissolved | 4 | 0 | 0 | ||
| Chloride [as Cl] | 2 | 0 | 0 | ||
| Whole Effluent Toxicity [WET] - P. promelas | 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 TX0058441.
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 TX0058441 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.