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Russian River Weekly Update 6/16/25

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Lake Mendocino, June 2025 by E Salomone
Lake Mendocino, June 2025 by E Salomone

Reservoir Storage & Operations:

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

Lake storage data: Mendocino 98,167 AF, Pillsbury 47,582 AF, Sonoma 256,103 AF. Notable storage percentage and weekly change included.
Graph of Lake Mendocino storage from 2018-2025 in acre-feet, with annual lines and storage curves.
Graph shows Lake Pillsbury storage (2018-2025) with targets. Peaks and declines in acre-feet across years, highlighting June 14, 2025 value.
Graph of Lake Sonoma's water storage from 2018-2025, showing variation in acre-feet over time with a future storage prediction.

PG&E and PVP

Uploaded recently:

Andrew Vartgess Comments to FERC 2025, 6-13.pdf

 

Notice of Additional 15 Day Written Comment Period for the Proposed Water Measurement and Reporting Revisions

The State Water Resources Control Board has updated the text of the proposed revisions for the Water Measurement and Reporting Regulation. The additional changes to California Code of Regulations, title 23 are based on public comments received during the previous public comment period. These additional changes are necessary to correct typos and make minor clarifications to the requirements of the regulation. Please note that the State Water Board will only accept written comments on the additional changes to the proposed regulatory text. The State Water Board will not be accepting additional comments on the revisions previously released.

A copy of the updated proposed regulation text with new changes, along with a notice of the additional 15-day written comment period, can be found on the Water Measurement and Reporting Rulemaking webpage.

Water Measurement and Reporting Rulemaking Webpage

Additional Information

Materials regarding the action (including the public notice, the updated regulation text, and previous rulemaking documents) are available via the internet and may be accessed in the links within the Current Rulemaking section from the Water Measurement and Reporting Regulation Rulemaking webpage: https://www.waterboards.ca.gov/waterrights/water_issues/programs/diversion_use/rulemaking.html. Please email DWR-Measurement@Waterboards.ca.gov or call (916) 323-9393 if you have any questions.

 

CA Water Data Consortium Presents Data for Lunch: Developing Drought Early Warning Systems in California Tuesday, June 17, 2025 | 12:00 - 1:30 p.m.

As California faces more extreme drought conditions, our complex water systems can struggle to respond. By linking water data directly to sector-specific impacts, we can better prepare for vulnerabilities and deploy resources more strategically across the state. Join our 6/17 Data for Lunch to learn how Dr. Alvar Escriva-Bou from UC Davis is helping lead a collaborative approach in California and beyond. Register

 

📢 State Water Board Announces New Water Rights Reporting System is Coming Soon!

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. 
  • 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) Will Close 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

California Natural Resources Agency Hosts Discussion on Saving California's Underwater Forests: Tuesday, June 17, 2025; from noon to 1pm

California’s massive kelp forests are key ecosystems in our ocean that foster world-class biodiversity and offer a haven for fishermen and divers. Tragically, kelp forests have collapsed off our coast in recent years as climate change has wreaked havoc on ocean conditions. But there is hope. Join us as we dive into kelp forests and hear from scientists, tribal experts, fishermen, and artists – all who are fighting to protect and restore these magnificent places. Register in advance here.

 

In the press:

 

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