Lake Tahoe

  • Lake Tahoe: A National Treasure

    Lake Tahoe is one of the world’s largest, deepest, and clearest mountain lakes—22 miles long, 11 miles wide and in a 501-square-mile watershed. The communities surrounding it depend on the protection of its stunning natural beauty and year-round recreational opportunities. The U.S. Forest Service and state agencies manage nearly 85% of the watershed’s land.

EPA’s Pacific Southwest (Region 9) implements and enforces federal environmental laws in Arizona, California, Hawaii, Nevada, the Pacific Islands, and 148 Tribal Nations.

Information on the Lake Tahoe watershed including: EPA's protection efforts, water quality issues, effects of climate change, Lake Tahoe Total Maximum Daily Load (TMDL), EPA-sponsored projects, and partner agencies.

  • About

    Cyclist at Lake Tahoe

    Learn about Lake Tahoe and its water quality concerns.

    About

  • Water Quality

    Lake Tahoe Shoreline

    Information about water quality programs working to keep Tahoe blue.

    Water Quality

  • Partners

    Four men in conversation with Lake Tahoe in the background

    Learn about the agencies, Tribes, and organizations at work in the Tahoe Basin.

    Partners

Projects

Lake Tahoe Environmental Improvement Program (EIP) Project Tracker

Lake Tahoe Environmental Improvement Program Project Tracker

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Last updated on April 29, 2025