The Palouse Basin Aquifer Committee works to ensure a long-term, quality water supply for the Palouse Basin region.

We are committed to working together


The primary role of PBAC is to encourage the member entities to implement the Palouse Basin Groundwater Management Plan, enacted in 1992 and updated in 2015. Additional roles involve education and information exchange, monitoring of pumping and groundwater levels, and funding of groundwater system research.

Upcoming Events


  • Aquifer Presentations
  • Topic: Basic Hydrologic Principles of Columbia River Plateau Aquifers & Upper Aquifer Characteristics
  • Date: Monday, November 28th from 10am-12pm
  • Location: UI Facilities or Zoom (Passcode: PBAC)


  • Topic: Conceptual Model for the Moscow-Pullman Aquifer System
  • Date: Wednesday, November 30th at 12:30pm
  • Location: UI IRIC Building (Room 305) or Zoom


  • UPCOMING PBAC MEETING: December 15, 2022, 2:00 PM

Alternative Water Supply Report

In 2020, PBAC commissioned Alta Science & Engineering, Inc. to refine four water supply alternatives and generate recommendations for the best way to move towards project implementation. PBAC adopted Alta's findings at their August 18, 2022 meeting.

|| Read the Summary

|| Read the Full Report

|| Give us your feedback

More Information

2015 Informational Update to the 1992 Groundwater Management Plan ||  Download

1992 Groundwater Management Plan ||  Download

Entity Action Plans ||  Download

PBAC Fact Sheet || Download

PBAC Mission and Goals ||  Download

History of Groundwater Management on the Palouse ||  Download

PBAC Bylaws ||  Download