Zapata County Waterworks Sewer Division WWTP
1/2 Mi E Of US Hwy 83 On 3rd Ave, Zapata, TX 78076 · Zapata County · Publicly Owned Treatment Works
- Average flow
- 0.56 MGD
- Design flow
- 0.8 MGD
- NPDES permit
- TX0070211
- Administratively continued
- Permit expires
- August 2026
- Population served
- 10,209
- CWNS 2022
Zapata County Waterworks Sewer Division WWTP is a publicly owned wastewater treatment works in Zapata, Zapata County, Texas treating an average of 0.56 million gallons per day against a permitted design capacity of 0.8 MGD, serving about 10,209 residents. It discharges under NPDES permit TX0070211 (administratively continued), which expires in August 2026, with 34 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in June 2026.
Treatment technology
2 treatment structures and unit processes identified at Zapata County Waterworks Sewer Division WWTP.
Available with a free Klarifi account
See the full treatment train at Zapata County Waterworks Sewer Division WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 34
- Effluent violations
- 34
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 Zapata County Waterworks Sewer Division WWTP in EPA's ICIS system.
- Formal actions
- 1
- 1 since FY2020
- Compliance actions
- $20,000
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Jun 2026
Zapata County Administrative Order
Administrative order · CWA, NPDES Permit Violations · Final Order Issued · Compliance actions $20,000
EPA's description of the case:
“On June 29, 2026, Region 6 issued an Administrative Order (AO) under its authority pursuant to the Clean Water Act to Zapata County, Texas. The AO was issued in response to effluent violations of…”
Unlock EPA's full description by creating a free account on Klarifi. Create a free account →
Source: EPA ECHO, civil enforcement case 06-2026-1813.
Full case history with a free Klarifi account
Every action against Zapata County Waterworks Sewer Division WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
2 verified contacts for Zapata County Waterworks Sewer Division WWTP, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Zapata County Waterworks Sewer Division WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Texas
Zapata · 12 mi away
0.0055 MGD
Laredo · 36 mi away
0.38 MGD
Roma · 38 mi away
1.37 MGD
Laredo · 41 mi away
10.86 MGD
Laredo · 44 mi away
10.77 MGD
Rio Grande City · 44 mi away
1.27 MGD
Laredo · 46 mi away
0.05 MGD
Hebbronville · 47 mi away
0.68 MGD
Zapata County Waterworks Sewer Division 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 26, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Centrate · Ozonation · all terms