Clean Water Act discharge permit · NPDES TX0124303
DEER PARK ENERGY CENTER, Deer Park, TX: NPDES TX0124303 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 25Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
- 1Inspections on file
- 0Formal enforcement actions
DEER PARK ENERGY CENTER, held by DEER PARK ENERGY CENTER LLC+, holds NPDES permit TX0124303, which discharges to Houston Ship Channel Tidal Of San Jacinto Rv. EPA’s file records it issued October 23, 2019 and expiring October 23, 2024.
DEER PARK ENERGY CENTER, Deer Park, Texas: Individual permit TX0124303, held by DEER PARK ENERGY CENTER LLC+; Administratively continued (past its expiration date and still in force until reissued); issued October 23, 2019, term to October 23, 2024; discharges to HOUSTON SHIP CHANNEL TIDAL OF SAN JACINTO RV.
- Oil & Grease: 4 limits, 9 violations of any kind, 5 effluent exceedances, latest June 30, 2023, largest 245% over the limit.
- Solids, total suspended: 4 limits, 12 violations of any kind, 4 effluent exceedances, latest January 31, 2020, largest 64% over the limit.
- Copper, total [as Cu]: 10 limits, 9 violations of any kind, 3 effluent exceedances, latest February 29, 2024, largest 97% over the limit.
- Flow, in conduit or thru treatment plant: 6 limits, 8 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia): 2 limits, 6 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 2 limits, 6 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 2 limits, 6 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 2 limits, 6 violations of any kind, 0 effluent exceedances.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 6 violations of any kind, 0 effluent exceedances.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 2 limits, 4 violations of any kind, 0 effluent exceedances.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia): 2 limits, 4 violations of any kind, 0 effluent exceedances.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- Temperature, water deg. fahrenheit: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- pH: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Iron, total [as Fe]: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Chlorine, free available: 0 limits, 2 violations of any kind, 0 effluent exceedances.
- Chlorine, total residual: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia): 1 limit, 1 violation of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute Menidia menidia: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- BOD, 5-day, 20 deg. C: 4 limits, 0 violations of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #1: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #2: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- May 22, 2026: Evaluation (S).
- January 31, 2018: Permit Violations - Violation Specified in Comment (ST6).
DEER PARK ENERGY CENTER among its neighbors
EPA’s permit file holds 301 discharge permits in the Vince Bayou-Buffalo Bayou subwatershed (HUC 120401040703), TX0124303 among them. Its county holds 4,455, 195 of them major permits; TX0124303 is a major permit.
Other permits in the Vince Bayou-Buffalo Bayou subwatershed (HUC 120401040703)
- 019-HOU3-22 HOUSTON CONCRETE SILOS, Houston: TXR1594NZ, minor permit, discharging to HOUSTON SHIP CHANNEL/BUFFALO BAYOU TIDAL, permit term to March 4, 2028
- 1111 FANNIN, Houston: TXR1556LZ, minor permit, permit term to March 4, 2028
- 225 RAIL YARD, Pasadena: TXR15425W, minor permit, discharging to HOUSTON SHIP CHANNEL/BUFFALO BAYOU TIDAL, permit term to March 4, 2023
- 500 MAYO SHELL ROAD, Galena Park: TXR05GS62, minor permit, permit term to August 13, 2026
- 69TH ST WWTP, Houston: TX0096172, major permit, discharging to Buffalo Bayou, permit term to September 1, 2002
- 8815 MISSISSIPPI, Houston: TXR05GD86, minor permit, permit term to August 13, 2026
- 8825 MISSISSIPPI STREET, Houston: TXR05GE47, minor permit, permit term to August 13, 2026
- A AND A METALS, Houston: TXRNEBJ94, minor permit, permit term to August 13, 2026
- AEI RED BLUFF, Pasadena: TXRNECR17, minor permit, permit term to August 13, 2026
- AES DEEPWATER COGENERATION PLA, Pasadena: TX0128830, minor permit, discharging to UNNAMED DITCH, VINCE BAYOU TIDAL PO, permit term to September 1, 2017
Identity
| Facility as filed | DEER PARK ENERGY CENTER |
|---|---|
| Permittee as filed | DEER PARK ENERGY CENTER LLC+ |
| NPDES ID | TX0124303 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | October 23, 2019 |
| Expiration date | October 23, 2024 |
| Address | Deer Park, TX 77536 |
| Receiving water | HOUSTON SHIP CHANNEL TIDAL OF SAN JACINTO RV |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Vince Bayou-Buffalo Bayou (HUC 120401040703) |
| Other EPA IDs (FRS) | RCRA handler TXR000051334; ICIS-AIR source TX0000004820101536 |
Effluent limits and exceedances
- 26Pollutants on file
- 25Under a numeric limit
- 23With 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 |
|---|---|---|---|---|---|
| Oil & Grease | 4 | 9 | 5 | June 30, 2023 | 245% over the limit |
| Solids, total suspended | 4 | 12 | 4 | January 31, 2020 | 64% over the limit |
| Copper, total [as Cu] | 10 | 9 | 3 | February 29, 2024 | 97% over the limit |
| Flow, in conduit or thru treatment plant | 6 | 8 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 2 | 6 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia | 2 | 6 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 6 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia | 2 | 6 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 6 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 2 | 6 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 6 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 2 | 6 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 4 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia | 2 | 4 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 2 | 4 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia | 2 | 4 | 0 | ||
| Temperature, water deg. fahrenheit | 2 | 2 | 0 | ||
| pH | 2 | 2 | 0 | ||
| Iron, total [as Fe] | 2 | 2 | 0 | ||
| Chlorine, free available | 0 | 2 | 0 | ||
| Chlorine, total residual | 1 | 1 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | 1 | 1 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Menidia menidia | 1 | 1 | 0 | ||
| BOD, 5-day, 20 deg. C | 4 | 0 | 0 | ||
| Whole effluent toxicity - retest #1 | 3 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 3 | 0 | 0 |
Inspections, violations and enforcement
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 31, 2018 | Permit Violations - Violation Specified in Comment | ST6 |
Inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| May 22, 2026 | Evaluation | S |
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES TX0124303.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.