Ullrich Water Treatment Plant Upgrades
Austin's largest water treatment plant since 1969.
The Ullrich Water Treatment Plant is the largest of Austin Water's three water treatment plants, with a rated treatment capacity of 167 million gallons per day. The plant uses a conventional lime softening process and draws raw water from Lake Austin. It has undergone several expansions and renovations over the years, most recently reaching its current capacity in 2006.
Austin Water is making process improvements to the Ullrich plant within its current footprint. These projects do not expand the plant's rated treatment capacity. The list below reflects current capital projects:
- Process Drain and Support System Improvements
- Onsite Sodium Hypochlorite and Liquid Ammonium Sulfate Conversion
- Roofing, Door and Window Renewal
- Lime Feed Loop
- Polymer Feed System
The plant's raw water is drawn from Lake Austin by the Low Service Pump Station, powered by an electrical substation built in 1969. That substation has exceeded its useful life and is being replaced with a modern enclosed electrical substation facility.
This Low Service Pump Station Electrical Feed Renewal will construct a new electrical duct bank connecting the substation to the pump station, allowing the new power distribution system to be built while the old one remains in service, keeping the plant operational throughout the project. A new access road will be built along the duct bank route, along with stormwater quality improvements at the pump station site.
Construction is now underway, with completion expected in 2026. This project is partially funded by the Drinking Water State Revolving Fund (DWSRF) through the Environmental Protection Agency (EPA). DWSRF funding is administered through the Texas Water Development Board (TWDB – DWSRF Project No. 62854)
Community Outreach
Austin Water provides periodic updates about projects and operations at the plant.
Past Meetings
- Nov. 5, 2025 — Presentation (PDF)
- Oct. 30, 2024 — Presentation (PDF)
- Nov. 15, 2023 — Presentation (PDF) and Ullrich Sound Propagation Study Final Modeling Report (PDF) (posted Feb. 13, 2024)
- May 17, 2023 — Meeting video, 2022 Draft Noise Study (PDF) and presentation (PDF)
Contact
Mary Anne Connolly
Austin Water Public Information Office
512-972-2180
maryanneconnolly@austintexas.gov