North Mustang Island WWTP
1500 Ross Ave, Port Aransas, TX 78373 · Nueces County · Publicly Owned Treatment Works
- Average flow
- 1.6 MGD
- Design flow
- 2.5 MGD
- NPDES permit
- TX0024287
- Effective
- Permit expires
- June 2031
- Population served
- 3,241
- CWNS 2022
North Mustang Island WWTP is a publicly owned wastewater treatment works in Port Aransas, Nueces County, Texas treating an average of 1.6 million gallons per day against a permitted design capacity of 2.5 MGD, serving about 3,241 residents. It discharges under NPDES permit TX0024287 (effective), which expires in June 2031, with 0 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in September 2022.
Treatment technology
2 treatment structures and unit processes identified at North Mustang Island WWTP.
Available with a free Klarifi account
See the full treatment train at North Mustang Island WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
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 North Mustang Island WWTP in EPA's ICIS system.
- Formal actions
- 1
- 1 since FY2020
- Compliance actions
- $15,000
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Sep 2022
Nueces County Water Control and Improvement District No.4
Administrative order · CWA, NPDES Permit Violations · Unilateral Administrative Order Without Adjudication · Compliance actions $15,000
EPA's description of the case:
“The order to Nueces County Water Control and Improvement District No.4 was issued due to permit effluent violations. A corrective action plan is required.”
Source: EPA ECHO, civil enforcement case 06-2021-1773.
Full case history with a free Klarifi account
Every action against North Mustang Island WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
3 verified contacts for North Mustang Island WWTP, with validated emails and direct phone numbers.
Unlock 3 verified contacts
Names, validated emails and direct phone numbers for decision-makers at North Mustang Island WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Texas
Aransas Pass · 6 mi away
1.45 MGD
Ingleside · 9 mi away
1.2 MGD
Rockport · 15 mi away
1.76 MGD
Gregory · 15 mi away
0.26 MGD
Corpus Christi · 16 mi away
2.28 MGD
Corpus Christi · 18 mi away
21.26 MGD
Corpus Christi · 19 mi away
1.35 MGD
Corpus Christi · 20 mi away
4.83 MGD
North Mustang Island 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 May 28, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Centrate · Ozonation · all terms