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[Portal ID #1962]

Department of Ecology
Committees, Boards, and Workgroups

Water Supply Availability Committee

 Ecology home | Water supply | Statewide conditions | Water Supply Availability Committee (WSAC)

Last revised: May 23, 2024


The Water Supply Availability Committee (WSAC) is a group of experts from state and federal agencies who evaluate statewide water supply conditions. Ecology convenes this group monthly. WSAC provides an important consultative and advisory role to Ecology related to current and forecasted water supply conditions and whether the hydrologic drought threshold has been met or is likely to be met: seventy-five percent of normal water supply within a geographic area (RCW 43.83B.405 and WAC 173-166-050).

If you would like to receive notices about WSAC meetings after they are posted to this page, subscribe to the Washington Water Supply Email list

WSAC's membership includes representatives from:

  • Department of Ecology
  • Office of Washington State Climatologist
  • U.S. Geological Survey
  • National Weather Service
  • Natural Resources Conservation Service
  • U.S. Bureau of Reclamation
  • U.S. Army Corps of Engineers
  • Bonneville Power Administration

If conditions warrant, WSAC can advise Ecology to convene the Executive Water Emergency Committee (EWEC), which is made of state agency leaders with a stake in water supplies. These leaders assess findings from WSAC and can recommend the governor direct Ecology to issue a drought advisory or an emergency drought declaration.

Helpful links
Drought Response main page: https://ecology.wa.gov/water-shorelines/water-supply/water-availability/statewide-conditions/drought-response
Drought Response grants webpage: https://ecology.wa.gov/about-us/payments-contracts-grants/grants-loans/find-a-grant-or-loan/drought-emergency-grants
Drought Response Grant Guidence: https://apps.ecology.wa.gov/publications/UIPages/documents/2411013.pdf

2024 Meetings

June 26

May 22

March 27

February 28

January 24

2023 Meetings

August 18

June 23

May 19

April 21

March 23

February 17

January 20

2022 Meetings

November 19

July 22

April 8

March 18

February 18

January 14

2021 Meetings

December 3

October 15

August 13

July 23

Meeting materials:

June 25

Meeting materials:

2021 meeting information for January - May can be requested. If you need something immediately contact Chris Anderson, see below.

2020 Meetings

December 11

August 7

April 13

February 28

January 24



Caroline Mellor
Commitee Chair (acting), Water Resources Program


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