Clean Water Act discharge permit · NPDES TX0023639
ISLA BLANCA WWTP, South Padre Island, TX: NPDES TX0023639 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 61Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
ISLA BLANCA WWTP, held by LAGUNA MADRE WATER DISTRICT, holds NPDES permit TX0023639, which discharges to Laguna Madre. EPA’s file records it issued October 20, 2015 and expiring July 1, 2020.
ISLA BLANCA WWTP, South Padre Island, Texas: Individual permit TX0023639, held by LAGUNA MADRE WATER DISTRICT; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued October 20, 2015, term to July 1, 2020; discharges to LAGUNA MADRE.
- Enterococci: 2 limits, 35 violations of any kind, 31 effluent exceedances, latest June 30, 2019, largest 12,035% over the limit.
- BOD, 5-day, 20 deg. C: 3 limits, 20 violations of any kind, 14 effluent exceedances, latest July 31, 2026, largest 114% over the limit.
- Solids, total suspended: 3 limits, 11 violations of any kind, 5 effluent exceedances, latest June 30, 2019, largest 65% over the limit.
- Flow, in conduit or thru treatment plant: 4 limits, 13 violations of any kind, 2 effluent exceedances, latest September 30, 2012, largest 400,015% over the limit.
- Chlorine, total residual: 2 limits, 6 violations of any kind, 2 effluent exceedances, latest March 31, 2014, largest 1,000% over the limit.
- pH: 3 limits, 9 violations of any kind, 1 effluent exceedance, latest January 31, 2019.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 10 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 10 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 10 violations of any kind, 0 effluent exceedances.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 10 violations of any kind, 0 effluent exceedances.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 10 violations of any kind, 0 effluent exceedances.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 10 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia): 2 limits, 8 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 2 limits, 8 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 2 limits, 8 violations of any kind, 0 effluent exceedances.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 2 limits, 8 violations of any kind, 0 effluent exceedances.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 2 limits, 8 violations of any kind, 0 effluent exceedances.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia): 2 limits, 8 violations of any kind, 0 effluent exceedances.
- Coliform, fecal general: 0 limits, 8 violations of any kind, 0 effluent exceedances.
- Conductivity: 3 limits, 6 violations of any kind, 0 effluent exceedances.
- Nitrogen, total [as N]: 3 limits, 6 violations of any kind, 0 effluent exceedances.
- Nitrate nitrogen, dry weight: 3 limits, 6 violations of any kind, 0 effluent exceedances.
- Nitrogen, Kjeldahl, total [as N]: 3 limits, 6 violations of any kind, 0 effluent exceedances.
- Phosphorus, total [as P]: 3 limits, 6 violations of any kind, 0 effluent exceedances.
- Potassium, total [as K]: 3 limits, 6 violations of any kind, 0 effluent exceedances.
- pH, in soil: 3 limits, 6 violations of any kind, 0 effluent exceedances.
- Cyanide, free [amenable to chlorination]: 3 limits, 3 violations of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute Menidia menidia: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Arsenic, dry weight: 5 limits, 2 violations of any kind, 0 effluent exceedances.
- Chromium, sludge, total, dry weight [as Cr]: 5 limits, 2 violations of any kind, 0 effluent exceedances.
- Nickel, total [as Ni]: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Description of pathogen option used: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- Oxygen, dissolved [DO]: 1 limit, 2 violations of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia): 1 limit, 2 violations of any kind, 0 effluent exceedances.
- Level of pathogen requirements achieved: 2 limits, 1 violation of any kind, 0 effluent exceedances.
- Vector attraction reduction alternative used: 2 limits, 1 violation of any kind, 0 effluent exceedances.
- Unit w/liner/leachate collection system: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Boundary areas: 1 limit, 1 violation of any kind, 0 effluent exceedances.
- Selenium, dry weight: 3 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.
- Copper, dry weight: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Cadmium, dry weight: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Zinc, sludge, total, dry weight [as Zn]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Lead, sludge, total, dry weight [as Pb]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Nickel, sludge, total, dry weight [as Ni]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Fecal coliform: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Polychlorinated biphenyls [PCBs]: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Toxicity characteristic leaching procedure: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual whole sludge application rate: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Ann. amt sludge disposed by other method: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual amt of sludge incinerated: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual sludge production, total: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual amount of sludge land applied: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual amt. sludge disposed surface unit: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual amt sludge disposed in landfill: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Annual amt sludge transported interstate: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- Compliance w/part 258 sludge requirement: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- October 1, 2024: Permit Violations - Violation Specified in Comment (ST6).
- April 29, 2022: Permit Violations - Violation Specified in Comment (ST6).
- September 21, 2017: Permit Violations - Violation Specified in Comment (ST6).
Texas holds 1,720 Publicly owned treatment works coverages of this permit type in EPA’s file; 186 were issued before TX0023639. LAGUNA MADRE WATER DISTRICT holds 10 permits in Texas.
Other permits held by LAGUNA MADRE WATER DISTRICT
- ANDY BOWIE WWTP, Port Isabel: TX0023621, issued November 5, 2020
- PORT ISABEL WWTP, Port Isabel: TX0023647, issued February 15, 2017
- PORT ISABEL WTP, Port Isabel: TX0024647
- LAGUNA VISTA WWTP, Cameron County: TX0117072, issued July 14, 2015
- LAGUNA MADRE WATER DISTRICT, Port Isabel: TX0132667
- LAGUNA MADRE WD SEAWATER DESALINATION PLANT, Port Isabel: TX0145912
- LAGUNA MADRE WATER DISTRICT SEAWATER DESALINATION PLANT, Port Isabel: TX0146579
- PORT ISABEL WASTEWATER TREATMENT FACILITY, Port Isabel: TX0147460
- WATER TREATMENT PLANT NO 1, Angana In Cameron Cnty: TXL005015
Coverages issued nearest TX0023639
- October 7, 2015: CITY OF SPEARMAN WWTP, Spearman, TX0032328, held by SPEARMAN, CITY OF
- October 7, 2015: LEON CREEK WATER RECYCLING CENTER WWTP, San Antonio, TX0052639, held by SAN ANTONIO WATER SYSTEM
- October 7, 2015: RIVERIA WCID WWTP, Riviera, TX0112763, held by RIVERIA WCID
- October 13, 2015: WOMAN HOLLERING TREATMENT PLANT, City Of Schertz, TX0136361, held by CIBOLO CREEK MUD
- October 14, 2015: PORT MANSFIELD PUD WWTF, Port Mansfield, TX0076392, held by PORT MANSFIELD PUBLIC UTILITY DISTRICT
- October 20, 2015: BENAVIDES SEWER TREATMENT PLANT, Benavides, TX0127205, held by DUVAL COUNTY CONSERVATION & RECLAMATION DISTRICT
- November 2, 2015: CITY OF PEARSALL WWTP, Pearsall, TX0032719, held by PEARSALL, CITY OF
- November 6, 2015: CITY OF EDINBURG WWTP, Edinburg, TX0024112, held by EDINBURG, CITY OF
- November 10, 2015: GALVESTON COUNTY WCID 8 WWTP, Galveston County, TX0023671, held by GALVESTON COUNTY WATER AND IMPROVEMENT DISTTICT 8
- November 10, 2015: CITY OF ALICE NORTHEAST WWTP, Alice, TX0091219, held by ALICE, CITY OF
ISLA BLANCA WWTP among its neighbors
Its county holds 327, 11 of them major permits; TX0023639 is a major permit.
Other permits in the county
- 57 SPACE CONCRETE, Brownsville: TXR1579UH, minor permit, discharging to BROWNSVILLE SHIP CHANNEL, permit term to March 4, 2028
- AAA COOPER TRANSPORTATION, La Feria: TXRNEAL13, minor permit, permit term to August 13, 2026
- ALAMO CONCRETE PRODUCTS PLANT 85, Brownsville: TXG110941, minor permit, discharging to BROWNSVILLE SHIP CHANNEL, permit term to November 7, 2021
- ALAMO CONCRETE PRODUCTS PLANT 86, Harlingen: TXG110938, minor permit, discharging to ARROYO COLORADO, permit term to November 7, 2021
- ALL STAR METALS, Brownsville: TXR05AF51, minor permit, permit term to August 13, 2026
- ALL STAR METALS LLC, Brownsville: TXR05FA0M, minor permit, permit term to February 28, 2026
- ALPHA TEAM INTERNATIONAL COMMERCE, La Feria: TXR05GZ36, minor permit, permit term to August 13, 2026
- ALTAS PALMAS PHASE I, Harlingen: TXR1569WN, minor permit, discharging to LAGUNA MADRE, permit term to March 4, 2028
- AMAZONCOM SERVICES LLC - WBV1, Brownsville: TXR05GY97, minor permit, permit term to August 13, 2026
- ANDY BOWIE WWTP, Port Isabel: TX0023621, minor permit, discharging to NON-TIDAL BRACKISH WETLAND;LAGUNA MADRE, permit term to November 5, 2023
Identity
| Facility as filed | ISLA BLANCA WWTP |
|---|---|
| Permittee as filed | LAGUNA MADRE WATER DISTRICT |
| NPDES ID | TX0023639 |
| 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 | October 20, 2015 |
| Expiration date | July 1, 2020 |
| Address | South Padre Island, TX 78597 |
| Receiving water | LAGUNA MADRE |
Effluent limits and exceedances
- 62Pollutants on file
- 61Under a numeric limit
- 38With 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; the 60 with the most exceedances of 62 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Enterococci | 2 | 35 | 31 | June 30, 2019 | 12,035% over the limit |
| BOD, 5-day, 20 deg. C | 3 | 20 | 14 | July 31, 2026 | 114% over the limit |
| Solids, total suspended | 3 | 11 | 5 | June 30, 2019 | 65% over the limit |
| Flow, in conduit or thru treatment plant | 4 | 13 | 2 | September 30, 2012 | 400,015% over the limit |
| Chlorine, total residual | 2 | 6 | 2 | March 31, 2014 | 1,000% over the limit |
| pH | 3 | 9 | 1 | January 31, 2019 | |
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia | 2 | 10 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia | 2 | 10 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 2 | 10 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 2 | 10 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia | 2 | 10 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia | 2 | 10 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 2 | 8 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 8 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 8 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 8 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 8 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 2 | 8 | 0 | ||
| Coliform, fecal general | 0 | 8 | 0 | ||
| Conductivity | 3 | 6 | 0 | ||
| Nitrogen, total [as N] | 3 | 6 | 0 | ||
| Nitrate nitrogen, dry weight | 3 | 6 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 3 | 6 | 0 | ||
| Phosphorus, total [as P] | 3 | 6 | 0 | ||
| Potassium, total [as K] | 3 | 6 | 0 | ||
| pH, in soil | 3 | 6 | 0 | ||
| Cyanide, free [amenable to chlorination] | 3 | 3 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Menidia menidia | 1 | 3 | 0 | ||
| Arsenic, dry weight | 5 | 2 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 2 | 0 | ||
| Nickel, total [as Ni] | 2 | 2 | 0 | ||
| Description of pathogen option used | 2 | 2 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 2 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | 1 | 2 | 0 | ||
| Level of pathogen requirements achieved | 2 | 1 | 0 | ||
| Vector attraction reduction alternative used | 2 | 1 | 0 | ||
| Unit w/liner/leachate collection system | 1 | 1 | 0 | ||
| Boundary areas | 1 | 1 | 0 | ||
| Selenium, dry weight | 3 | 0 | 0 | ||
| Whole effluent toxicity - retest #1 | 3 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 3 | 0 | 0 | ||
| Copper, dry weight | 3 | 0 | 0 | ||
| Cadmium, dry weight | 3 | 0 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 0 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 0 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 0 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 0 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 0 | 0 | ||
| Fecal coliform | 1 | 0 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 0 | 0 | ||
| Toxicity characteristic leaching procedure | 1 | 0 | 0 | ||
| Annual whole sludge application rate | 1 | 0 | 0 | ||
| Ann. amt sludge disposed by other method | 1 | 0 | 0 | ||
| Annual amt of sludge incinerated | 1 | 0 | 0 | ||
| Annual sludge production, total | 1 | 0 | 0 | ||
| Annual amount of sludge land applied | 1 | 0 | 0 | ||
| Annual amt. sludge disposed surface unit | 1 | 0 | 0 | ||
| Annual amt sludge disposed in landfill | 1 | 0 | 0 | ||
| Annual amt sludge transported interstate | 1 | 0 | 0 | ||
| Compliance w/part 258 sludge requirement | 1 | 0 | 0 |
Inspections, violations and enforcement
- 3Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| October 1, 2024 | Permit Violations - Violation Specified in Comment | ST6 |
| April 29, 2022 | Permit Violations - Violation Specified in Comment | ST6 |
| September 21, 2017 | Permit Violations - Violation Specified in Comment | ST6 |
Inspections
EPA’s inspection file holds no inspection for NPDES TX0023639.
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 TX0023639.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.