Freshwater Supply District 23
8219 Kellet St, Houston, TX 77087 · Harris County · Publicly Owned Treatment Works
- Average flow
- 13.57 MGD
- Design flow
- 7 MGD
- NPDES permit
- TX0063053
- Effective
- Permit expires
- August 2031
- Population served
- 42,828
- CWNS 2022
Freshwater Supply District 23 is a publicly owned wastewater treatment plant in Houston, Harris County, Texas treating an average of 13.57 million gallons per day against a permitted design capacity of 7 MGD, serving about 42,828 residents. It discharges under NPDES permit TX0063053 (effective), which expires in August 2031, with 4 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in April 2021.
Treatment technology
One treatment structure or unit process identified at Freshwater Supply District 23.
Available with a free Klarifi account
See the full treatment train at Freshwater Supply District 23: structures, unit processes and planned upgrades, with exact unit counts.
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.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Freshwater Supply District 23 in EPA's ICIS system.
- Formal actions
- 1
- 0 since FY2020
- Penalties assessed
- $4.4M
- all cases
- Compliance actions
- $2,000M
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Apr 2021
Houston, City of
Judicial case · CWA, NPDES Permit Violations · Final Order With Penalty · Penalty $4.4M · Compliance actions $2,000M · The case also names 35 other plants, and its amounts cover all of them
EPA's description of the case:
“City of Houston was issued the Consent Decree for both permit effluent violations and Sanitary Sewer Overflows.”
Source: EPA ECHO, civil enforcement case 06-2010-1780.
Full case history with a free Klarifi account
Every action against Freshwater Supply District 23 with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Capital improvement projects in Houston
Houston's capital improvement plan lists 22 water, sewer and wastewater line items worth $1.3B starting 2025–2025. The largest budgeted items are shown here.
All water and sewer capital projects in Houston →
| Project | Budget | Years |
|---|---|---|
| Wastewater Treatment Plant Improvements | $353,943,200 | 2025–2025 |
| Wastewater Treatment Plant Consolidation | $166,807,000 | 2025–2025 |
| Surface Water Transmission Program | $132,740,144 | 2025–2025 |
| Neighborhood Sewer Rehab Program | $96,000,000 | 2025–2025 |
| Pump Station Program | $87,851,600 | 2025–2025 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
Decision-makers at Freshwater Supply District 23.
No verified contacts on file yet
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Nearby wastewater treatment plants in Texas
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Houston · 4 mi away
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Houston · 4 mi away
0.64 MGD
Houston · 4 mi away
—
Houston · 5 mi away
0.94 MGD
Houston · 5 mi away
1.08 MGD
Freshwater Supply District 23: 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 · Biological nutrient removal · Tertiary treatment · all terms