Water Shortage Vulnerability Scoring and Tool

Access the Results
Update 2024 of the Water Shortage Vulnerability Scoring for the Domestic Wells and State Small Water Systems Assessment can be accessed below: 

Explorer Tool (online web map tool)	Tutorial to the Explorer Tool Webinar on Scoring Overview and Tool Demo: Recording & Presentation	Methods to Water Shortage Vulnerability Scoring Process and Results Document Technical Methods for Social Vulnerability	Data at CNRA Open Data Physical Vulnerability Social Vulnerability

Access the Results
Update 2024 of the Water Shortage Vulnerability Scoring for the Small Water Systems Assessment can be accessed below: 

Explorer Tool (online web map tool)	Tutorial to the Explorer Tool Webinar on Scoring Overview and Tool Demo: Recording & Presentation	Methods to Water Shortage Vulnerability Scoring Process and Results Document	Data at CNRA Open Data Water Shortage Vulnerability

To improve water conservation and water shortage planning, Assembly Bill 1668 (Friedman), passed into law in 2018, directed DWR to do the following:

• Identify small suppliers and rural communities at risk of drought and water shortage vulnerability and
• Develop recommendations for improving drought contingency planning for those areas.

Visit DWR's County Drought Planning page to learn more about the County Drought Advisory Group process.

Senate Bill 552 (Hertzberg), passed into law in 2021, directed DWR to maintain and update the water shortage vulnerability score and tool for small water suppliers and rural communities. To view past releases of water shortage vulnerability analyses, visit the CNRA Open Data Portal.

The Water Code Section 10609.80(a) requires DWR to take both of the following actions to support implementation of the recommendations of its County Drought Advisory Group:

(1) Maintain, in partnership with the state board and other relevant state agencies, the risk vulnerability tool developed as part of the County Drought Advisory Group process and continue to refine existing data and gather new data for the tool, including, but not limited to, data on all of the following:

(A) Small water suppliers and nontransient noncommunity water systems serving a school.

(B) State small water systems and rural communities.

(C) Domestic wells and other self-supplied residents.

(2) Update the risk vulnerability tool for small water suppliers and rural communities periodically, by doing all of the following:

(A) Revise the indicators and construction of the scoring as more data becomes readily available.

(B) Make existing and new data publicly available on the California Open Data internet web portal.

(C) In consultation with other relevant state agencies, identify deficits in data quality and availability and develop recommendations to address these gaps.