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Reservoir Storage & Operations:

Water supply information provided by Sonoma Water (find more water storage info here).

FERC Approval of the PG&E 2025 Flow Variance, Reducing Water Diversions to the Russian

On August 4, 2025, FERC approved the PG&E 2025 Flow Variance, reducing water diversions to the Russian River basin. More information here.

The State Water Resources Control Board has developed a tool for water right holders, linked below. At the September 3, 2025 State Water Board meeting, staff provided an update on the Water Supply and Demand Assessment Program in which the Russian River was discussed throughout.

State Water Resources Control Board Supply and Demand Assessment tool for the Russian River

📢 State Water Board Announces New Water Rights Reporting System

The State Water Resources Control Board is launching a new and improved system called CalWATRS (short for California Water Accounting Tracking and Reporting System) to make reporting water rights easier and more efficient. This system will help the state manage water data better and make it easier for the public to access important information. 

What You Need to Know 

• Early Access Starts in July 2025 You’ll be able to explore and get used to the new CalWATRS system from July through September 2025. This is your chance to try it out before official reporting begins. Look for more information on the CalWATRS website. https://www.waterboards.ca.gov/upward/calwatrs/
• Official Reporting Begins October 2025 You can start submitting your water rights reports to CalWATRS in October 2025. Reports for the 2024-2025 water year will be due by January 31, 2026. More details and instructions will be shared closer to October. 
• Current System (eWRIMS) Closed June 8, 2025 The current system, eWRIMS, will stop accepting reports on June 8, 2025. You’ll still be able to search for water rights information in eWRIMS after that, but you won’t be able to submit anything new. 
• No Changes to Old Reports from June 8 – September 30, 2025 During the switch to CalWATRS, you won’t be able to edit or amend past reports between June 8 and September 30, 2025. If you need to make changes to old reports, do it before June 8 in eWRIMS, or wait until after October 1 in CalWATRS. 
• CalWATRS Website and Email Updates The CalWATRS website is your go-to hub for the latest news, system updates, and helpful resources. While you’re there, sign up for the CalWATRS email list to receive important announcements and helpful information straight to your inbox. 

“We appreciate your help and patience as we make this big improvement. Like with any new system, there may be a few bumps along the way, but we’re here to support you and make the transition as smooth as possible. More help and guidance will be available soon! For questions or assistance, please email CalWATRS-help@waterboards.ca.gov” 

In the press:

• CA Water Plan eNews 9/17/25
• Maven's Notebook Weekly Edition 9/14 to 9/19/25
• Maven's Notebook weekend edition 9/21/25

• Center for Western Weather & Water Extremes: Atmospheric Rivers and Floods in California’s Changing Hydroclimate 9/15/25
• Union of Concerned Scientists: Working with Nature to Protect California's Agricultural Regions: How Nature-Based Solutions Can Build Resilience 9/16/25
• Press Release: State Water Board provides $2 billion to advance 9/15/25
• The Hill: Sweeping California climate bills heading to Newsom’s desk 9/15/25
• CNN: The system that moves water around the planet is increasingly ‘erratic and extreme,’ new report finds 9/17/25
• World Meteorological Organization: From drought to deluge: WMO report highlights increasingly erratic water cycl 9/18/25
• Phys.org: Quakes can reshape rivers and raise flood risks 9/19/25