Harris Co. Wcid 21 WWTP
Channelview, TX · Harris County · Publicly Owned Treatment Works
- Average flow
- 2.58 MGD
- Design flow
- 2.5 MGD
- NPDES permit
- TX0022756
- Effective
- Permit expires
- October 2028
- Population served
- 9,723
- CWNS 2022
Harris Co. Wcid 21 WWTP is a publicly owned wastewater treatment works in Channelview, Harris County, Texas treating an average of 2.58 million gallons per day against a permitted design capacity of 2.5 MGD, serving about 9,723 residents. Treatment on site includes clarifiers. It discharges under NPDES permit TX0022756 (effective), which expires in October 2028, with 44 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Compliance snapshot (last 3 years)
- Total violations
- 44
- Effluent violations
- 20
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Harris Co. Wcid 21 WWTP.
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Nearby wastewater treatment plants in Texas
Channelview · 1 mi away
1.88 MGD
Houston · 3 mi away
0.004 MGD
Channelview · 3 mi away
0.58 MGD
Houston · 3 mi away
5.88 MGD
Baytown · 4 mi away
4.25 MGD
Baytown · 4 mi away
0.12 MGD
Houston · 4 mi away
0.5 MGD
Deer Park · 5 mi away
4.31 MGD
Harris Co. Wcid 21 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 September 11, 2026; facility record last updated May 26, 2025.