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Today is
[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: July 10, 2025
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 Guidance: https://apps.ecology.wa.gov/publications/SummaryPages/2511013.html
2025 Meetings
July 10
June 12
May 8
- Video
- Ecology Slides
- NRCS Slides
- USGS Slides
- Washington State Climate Office Slides
- National Weather Service Slides
- Bureau of Reclamation Slides
April 10
March 13
February 13
January 10
2024 Meetings
December 12
November 14
October 11
September 11
July 24
June 26
May 22
March 27
February 28
- Presentations combined into one file (Ecology, OWSC, NWRFC, NRCS, BOR)
- USGS presentation (not present/included in video recording)
- Full video recording of meeting
January 24
- Presentations combined in one file (Ecology, NRCS, OWSC, NWS, USGS, BOR)
2023 Meetings
August 18
- Presentations combined in one file (Ecology, NRCS, OWSC, NWS, USGS, BOR)
- Seattle Public Utilities - Water Supply Conditions
June 23
- Presentations combined in one file (Ecology, NRCS, OWSC, NWS, USGS, BOR)
May 19
- Presentations combined in one file (Ecology, NRCS, OWSC, NWS, USGS, BOR)
April 21
- Presentations combined in one file (Ecology, NRCS, OWSC, NWS, USGS, BOR)
March 23
- Presentations combined in one file (Ecology, NRCS, OWSC, NWS, USGS, BOR)
February 17
- Presentations combined in one file (Ecology, NRCS, OWSC, NWS, USGS, BOR)
- Index of Soil Saturation - NRCS (choose .html from list to view plot in browser)
January 20
- Presentations combined in one file (Ecology, NRCS, OWSC, NWS, USGS, BOR)
2022 Meetings
November 19
- Presentations combined in one file (Ecology, NRCS, OWSC, NWS, USGS, BOR)
July 22
- Presentations combined in one file (Ecology, NRCS, OWSC, NWS, USGS, BOR)
April 8
- Presentations combined in one file (Ecology, NRCS, OWSC, NWS, USGS, BOR)
March 18
- Presentations combined in one file (Ecology, NRCS, OWSC, NWS, USGS, BOR)
February 18
- Presentations combined in one file (Ecology, NRCS, OWSC, NWS, USGS, BOR)
January 14
- Presentations combined in one file (Ecology, NRCS, OWSC, NWS, USGS, BOR)
2021 Meetings
December 3
- Presentations combined in one file (Ecology, NRCS, OWSC, NWS, USGS, BOR)
October 15
- Presentations combined in one file (Ecology, NRCS, OWSC, NWS, USGS, BOR)
August 13
- Presentations combined in one file (Ecology, NRCS, OWSC, NWS, USGS)
July 23
Meeting materials:
- Presentations combined in one file (Ecology, NRCS, OWSC, NWS, USGS)
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
Contacts
Caroline Mellor
Commitee Chair, Water Resources Program
caroline.mellor@ecy.wa.gov
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