Council Discusses Growth and Wastewater Treatment Expansion in Liberty Hill

The Georgetown workshop held on August 26, 2025, focused on critical discussions regarding wastewater treatment capacity and future infrastructure needs in Williamson County, Texas. Key topics included the sizing and phasing of treatment plants, the implications of upcoming annexations, and the anticipated stricter permit limits for wastewater discharge.

During the meeting, officials emphasized the importance of strategically sizing the wastewater treatment facilities to avoid stranded costs. The discussion highlighted the need for flexibility in capacity planning, particularly in light of new developments in the area, such as the heirloom tract and other residential projects. It was noted that the current flow could quickly exceed the existing capacity of 1.5 million gallons per day (MGD), prompting considerations for expanding to 3 MGD.

Concerns were raised about future permit limits, particularly regarding phosphorus levels, which can lead to environmental issues like algae blooms. Officials confirmed that while other limits are manageable, phosphorus removal remains a significant challenge. The proposed solutions include utilizing biological nutrient removal (BNR) processes and chemical treatments to meet the expected standards.

The workshop also addressed the financial implications of delaying upgrades to the wastewater treatment facilities. While no specific lifecycle cost analysis was conducted for a potential delay until 2050, initial assessments indicated that the current options could be more cost-effective if implemented sooner rather than later.

In conclusion, the Georgetown workshop underscored the urgency of addressing wastewater treatment capacity and compliance with environmental regulations. As the city anticipates growth and stricter permit requirements, strategic planning and timely investments in infrastructure will be crucial to meet future demands and protect local waterways.