Nassau Bay WWTP - Upper Bay
Nassau Bay, TX · Harris County · Publicly Owned Treatment Works
- Average flow
- 0.74 MGD
- Design flow
- 1.33 MGD
- NPDES permit
- TX0023833
- Effective
- Permit expires
- January 2030
- Population served
- 7,408
- CWNS 2022
Nassau Bay WWTP - Upper Bay is a publicly owned wastewater treatment works in Nassau Bay, Harris County, Texas treating an average of 0.74 million gallons per day against a permitted design capacity of 1.33 MGD, serving about 7,408 residents. It discharges under NPDES permit TX0023833 (effective), which expires in January 2030, with 4 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 4
- Effluent violations
- 4
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Nassau Bay WWTP - Upper Bay, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Nassau Bay WWTP - Upper Bay, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Texas
League City · 1 mi away
11.35 MGD
Webster · 1 mi away
1.7 MGD
Houston · 3 mi away
6.3 MGD
El Lago · 4 mi away
0.24 MGD
Seabrook · 5 mi away
—
Kemah · 5 mi away
0.69 MGD
Houston · 5 mi away
7.25 MGD
Bacliff · 5 mi away
0.32 MGD
Nassau Bay WWTP - Upper Bay: 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 September 11, 2026; facility record last updated March 11, 2025.