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Keeping Lake Tahoe Blue: Tahoe Regional Plan Update

Lake Tahoe.

Lake Tahoe, famed for its clarity, is one of the largest and deepest mountain lakes in the United States.

Celso Diniz / Shutterstock

Case Overview

Two Tahoe conservation groups, the Sierra Club and Friends of the West Shore, have filed a federal lawsuit challenging new rules for Lake Tahoe that seriously reduce protections for the treasured mountain lake. The new Tahoe Regional Plan Update, approved in December 2012 by the Tahoe Regional Planning Agency (TRPA), shifts authority over future development decisions to local jurisdictions. The plan also allows those towns and counties to adopt weakened pollution controls that do not meet the minimum environmental requirements established by TRPA.

Lake Tahoe is one of the largest and deepest mountain lakes in the United States, and TRPA’s fundamental purpose is to restore the lake’s water clarity and health. Under the challenged plan, water quality monitoring does not require actual monitoring water quality of runoff; it only tracks whether runoff catchment basins have been installed where they are needed.

The Plan Update will precipitate a drastic expansion of development that would be allowed without adequate environmental safeguards, preventing the achievement of the Tahoe Regional Planning Compact’s core purpose—protection and restoration of Lake Tahoe. Most of Tahoe’s developable land is in California, which contains two-thirds of the Lake’s shoreline, where existing development poses the most serious water-quality problems.

Case ID


Case Updates

November 7, 2013 | In the News: Los Angeles Times

California Caves to Nevada’s Tahoe Regional Plan Update

Nevada and California ended their bargaining over future development in Lake Tahoe, enacting a revised plan that allots higher density and taller structures. Environmental groups urged California to hold Nevada to the original intent of the bi-state compact—protecting Lake Tahoe from environmental pollution.

"California should be in the driver's seat," Earthjustice Attorney Trent W. Orr said, noting that the state contributes six times more funding to lake restoration projects than Nevada does. "Why is the one holding most of the chips saying 'Uncle'?"

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