Harlingen WWTP
0.25M S E. Harrison Ave., Harlingen, TX 78550 · Cameron County · Publicly Owned Treatment Works
- Average flow
- 6.87 MGD
- Design flow
- 10 MGD
- NPDES permit
- TX0047929
- Administratively continued
- Permit expires
- December 2025
- Population served
- 80,858
- CWNS 2022
Harlingen WWTP is a publicly owned wastewater treatment works in Harlingen, Cameron County, Texas treating an average of 6.87 million gallons per day against a permitted design capacity of 10 MGD, serving about 80,858 residents. It discharges under NPDES permit TX0047929 (administratively continued), which expires in December 2025, with 6 recorded violations in the last three years. EPA has recorded 2 formal enforcement actions naming the plant, the latest in September 2024.
Treatment technology
4 treatment structures and unit processes identified at Harlingen WWTP.
Available with a free Klarifi account
See the full treatment train at Harlingen WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 6
- Effluent violations
- 6
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 Harlingen WWTP in EPA's ICIS system.
- Formal actions
- 2
- 1 since FY2020
- Compliance actions
- $10,000
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Sep 2024
City of Harlingen Waterworks System
Administrative order · CWA, NPDES Permit Violations · Unilateral Administrative Order Without Adjudication · Compliance actions $10,000
EPA's description of the case:
“The order was issued to the City of Harlingen Waterworks System for permit violations. The order requires a corrective action plan to be submitted within 30 days.”
Source: EPA ECHO, civil enforcement case 06-2022-1780.
Full case history with a free Klarifi account
Every action against Harlingen WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Capital improvement projects in Harlingen
Harlingen's capital improvement plan lists 1 water, sewer and wastewater line items worth $12M starting 2024–2024. The largest budgeted items are shown here.
| Project | Budget | Years |
|---|---|---|
| 21st Street Storm Sewer Improvements | $12,000,000 | 2024–2027 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
10 verified contacts for Harlingen WWTP, with validated emails and direct phone numbers.
Unlock 10 verified contacts (7 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Harlingen WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Texas
San Benito · 1 mi away
1.86 MGD
Rancho Viejo · 4 mi away
0.41 MGD
Rio Hondo · 6 mi away
0.08 MGD
Santa Rosa · 12 mi away
0.27 MGD
La Feria · 12 mi away
0.8 MGD
Los Fresnos · 13 mi away
1.19 MGD
Sebastian · 14 mi away
0.1 MGD
Mercedes · 16 mi away
2.21 MGD
Harlingen 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 March 16, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · WWTP · Biosolids · all terms