San Leon Mud-Plant - 443 24th Ave
Avenue L And 27th St, San Leon, TX 77539 · Galveston County · Publicly Owned Treatment Works
- Average flow
- 2.35 MGD
- Design flow
- 1.9 MGD
- NPDES permit
- TX0071978
- Effective
- Permit expires
- July 2029
- Population served
- 5,336
- CWNS 2022
San Leon Mud-Plant - 443 24th Ave is a publicly owned wastewater treatment plant in San Leon, Galveston County, Texas treating an average of 2.35 million gallons per day against a permitted design capacity of 1.9 MGD, serving about 5,336 residents. It discharges under NPDES permit TX0071978 (effective), which expires in July 2029, with 5 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at San Leon Mud-Plant - 443 24th Ave.
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See the full treatment train at San Leon Mud-Plant - 443 24th Ave: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 5
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at San Leon Mud-Plant - 443 24th Ave.
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San Leon Mud-Plant - 443 24th Ave: 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 · FOG · Equalization tank · all terms