2021 SECURE Water Act Report to Congress

SECURE Water Act Report CoverThe Bureau of Reclamation released final technical reports supporting the Water Reliability in the West - 2021 SECURE Water Act Report. Reclamation's 2021 West-Wide Climate and Hydrology Assessment and seven individual basin reports provide detailed information on climate change impacts and adaptation strategies to increase water supply reliability in the West. A new 2021 SECURE Report Web Portal is also available to provide a user-friendly, web-based format for delivery of information in the reports.

The 2021 West-Wide Assessment provides estimates of changes in temperature, precipitation, snowpack, and streamflow across the West using consistent methodology, similar to previous SECURE Water Act Reports. For this report, additional drought analyses based on paleohydrology (using tree rings) was performed. These results will enable water managers to compare the frequency and severity of droughts that occurred several hundred years ago to projections of future droughts and develop water management strategies in time to take action.

SECURE Water Act Report

Interactive Web Portal

West-Wide Climate and Hydrology Assessment (March 2021) Version 1.2 (PDF - 23 MB)
Errata Sheet for Versions 1.0 and 1.1 (June 2021)

News Release: Reclamation releases technical reports and interactive web tool supporting the 2021 SECURE Water Act Report (April 5, 2021)

Basin Reports

SECURE Water Act Webinars

To help with the understanding of the information provided in the assessment and seven basin reports, Reclamation held a series of webinars in the spring of 2021.

Recorded Webinars

Interactive Web Portal

A screenshot of map showing drought severity in the western United States
2021 SECURE Report Web Portal

More Climate Change Information

2021 Pecos River Basin Study New Mexico

2021 Missouri Headwaters Basin Study

2021 West-Wide Climate and Hydrology Assessment and Basin Reports

Climate Change Adaptation Strategy: 2016 Progress Report

Climate Change Adaptation Strategy: 2014 Progress Report

SECURE Water Act Section 9503(c) - Reclamation Climate Change and Water

Reclamation Releases Literature Synthesis on Climate Change Implications for Reclamation's Water and Environmental Resources (3rd Edition) - A scientific report summarizing recent literature on the past and projected effects of climate change on hydrology and water resources in the western United States. Read More →

Last Updated: 10/25/21