Isla Blanca WWTP
4000' S Of The E End Causeway, Port Isabel, TX 78578 · Cameron County · Publicly Owned Treatment Works
- Average flow
- 1.68 MGD
- Design flow
- 2.6 MGD
- NPDES permit
- TX0023639
- Administratively continued
- Permit expires
- September 2025
- Population served
- 13,117
- CWNS 2022
Isla Blanca WWTP is a publicly owned wastewater treatment works in Port Isabel, Cameron County, Texas treating an average of 1.68 million gallons per day against a permitted design capacity of 2.6 MGD, serving about 13,117 residents. It discharges under NPDES permit TX0023639 (administratively continued), which expires in September 2025, with 3 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in October 2017.
Treatment technology
2 treatment structures and unit processes identified at Isla Blanca WWTP.
Available with a free Klarifi account
See the full treatment train at Isla Blanca WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 3
- Effluent violations
- 3
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Isla Blanca WWTP in EPA's ICIS system.
- Formal actions
- 1
- 0 since FY2020
- Compliance actions
- $4,000
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Oct 2017
Laguna Madre Water District
Administrative order · CWA, NPDES Permit Violations · Unilateral Administrative Order Without Adjudication · Compliance actions $4,000
EPA's description of the case:
“The Administrative Order to Laguna Madre Water District, Isla Blanca Wastewater Treatment Facility was issued on June 8.2017. The order was issued for violations of permit effluent violations and…”
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Source: EPA ECHO, civil enforcement case 06-2017-1763.
Full case history with a free Klarifi account
Every action against Isla Blanca WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
2 verified contacts for Isla Blanca WWTP, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Isla Blanca WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Texas
Port Isabel · 6 mi away
0.74 MGD
Laguna Vista · 7 mi away
0.43 MGD
Port Isabel · 7 mi away
0.94 MGD
Brownsville · 13 mi away
0.06 MGD
Brownsville · 16 mi away
9.12 MGD
Los Fresnos · 16 mi away
1.19 MGD
Brownsville · 19 mi away
—
Rio Hondo · 26 mi away
0.08 MGD
Isla Blanca WWTP: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 26, 2026; facility record last updated July 29, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Significant industrial user · WWTP · all terms