City Of Tomball South WWTP
4300' E Intx Holderrieth Rd & Holderrieth Rd, Tomball, TX 77375 · Harris County · Publicly Owned Treatment Works
- Average flow
- 1.92 MGD
- Design flow
- 1.5 MGD
- NPDES permit
- TX0117595
- Effective
- Permit expires
- November 2028
- Population served
- 10,418
- CWNS 2022
City Of Tomball South WWTP is a publicly owned wastewater treatment works in Tomball, Harris County, Texas treating an average of 1.92 million gallons per day against a permitted design capacity of 1.5 MGD, serving about 10,418 residents. It discharges under NPDES permit TX0117595 (effective), which expires in November 2028, with 8 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at City Of Tomball South WWTP.
Available with a free Klarifi account
See the full treatment train at City Of Tomball South WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 8
- Effluent violations
- 5
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
17 verified contacts for City Of Tomball South WWTP, with validated emails and direct phone numbers.
Unlock 17 verified contacts (14 more than shown)
Names, validated emails and direct phone numbers for decision-makers at City Of Tomball South WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Texas
Tomball · 1 mi away
0.84 MGD
Houston · 2 mi away
0.3 MGD
Spring · 3 mi away
0.92 MGD
Tomball · 3 mi away
0.14 MGD
Spring · 4 mi away
0.9 MGD
Cypress · 4 mi away
1.07 MGD
Houston · 4 mi away
1.22 MGD
Klein · 4 mi away
0.52 MGD
City Of Tomball South 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 29, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Tertiary treatment · Significant industrial user · all terms