Johnson County Sud WWTP
2.5Mi NE Intx Sthwy 174/Fm 917, Joshua, TX 76058 · Johnson County · Publicly Owned Treatment Works
- Average flow
- 0.82 MGD
- Design flow
- 0.79 MGD
- NPDES permit
- TX0124923
- Administratively continued
- Permit expires
- October 2026
- Population served
- 4,630
- CWNS 2022
Johnson County Sud WWTP is a publicly owned wastewater treatment works in Joshua, Johnson County, Texas treating an average of 0.82 million gallons per day against a permitted design capacity of 0.79 MGD, serving about 4,630 residents. It discharges under NPDES permit TX0124923 (administratively continued), which expires in October 2026, with 6 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Johnson County Sud WWTP.
Available with a free Klarifi account
See the full treatment train at Johnson County Sud 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.
Key contacts
Decision-makers at Johnson County Sud WWTP.
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Nearby wastewater treatment plants in Texas
Joshua · 7 mi away
0.09 MGD
Keene · 8 mi away
0.91 MGD
Burleson · 8 mi away
0.0033 MGD
Alvarado · 11 mi away
1.28 MGD
Godley · 11 mi away
0.39 MGD
Cleburne · 13 mi away
4.75 MGD
Rio Vista · 19 mi away
0.02 MGD
Midlothian · 20 mi away
5.89 MGD
Johnson County Sud 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 27, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Ozonation · Activated sludge · all terms