Topic: Mono Lake

Overview

Mono Lake

Mono Lake is an inland sea sitting near the border of the Nevada state line, east of Yosemite National Park. It was the target of a major environmental battle between the 1970s and the 1990s.

The lake has a surface area of about 70 square miles, is the second largest lake in California and one of the oldest in North America. Its salty water occupies former volcanic craters and is highly alkaline. 

Los Angeles began diverting water from Mono Lake tributaries in the 1940s, extending the Los Angeles Aqueduct from the Owens Valley. Forty years later, the water level of the lake had dropped more than 40 feet to threaten wildlife (shrimp and birds) and uncover stretches of the lake bed, which in dust storms stirs up toxic dust.

In 1983, the California Supreme Court held the public trust doctrine applied to Los Angeles’ rights to divert water from Mono Lake’s feeder streams. In 1991, a superior court halted LADWP’s water exports. Restoration is underway to increase the water level by 20 feet by 2021.

Aquafornia news San Francisco Chronicle

Opinion: Mono Lake still needs saving. Here’s what should happen next

The California State Water Resources Control Board is rightfully turning attention back to how much water the Los Angeles Department of Water and Power should take from the Mono Lake Basin. As climate change puts more pressure on water resources, it’s high time to reconsider that question. Los Angeles’ appropriation of water from remote places like Mono Lake is the desert metropolis’ original sin, with existential consequences for rural parts of the state. But in recent commitments to double down on municipal water reclamation, the city has made brave decisions to shift toward greater water security and stewardship.
–Written by Erin Ryan, the Charles and Ramona Hilliard Professor of Law at the University of Southern California’s Gould School of Law and the author of “Law for the Land: The Public Trust Doctrine, Mono Lake, and a Quiet Revolution in Environmental Rights.”

Guía Para El Publico en General Sobre El Agua De California
Publicado 2026

La Guía para el Público en General sobre el Agua en California, de 24 páginas, ofrece una visión integral de la historia del desarrollo de los recursos hídricos en California y de la gestión de los numerosos desafíos que enfrenta el estado en la actualidad.

Layperson’s Guide to California Water
Updated 2026

The 24-page Layperson’s Guide to California Water provides a comprehensive overview of the history of water development in California and management of its many challenges today.

Video

A Climate of Change: Water Adaptation Strategies

This 25-minute documentary-style DVD, developed in partnership with the California Department of Water Resources, provides an excellent overview of climate change and how it is already affecting California. The DVD also explains what scientists anticipate in the future related to sea level rise and precipitation/runoff changes and explores the efforts that are underway to plan and adapt to climate.

Publication

Layperson’s Guide to Water Rights Law
Updated 2020

The 28-page Layperson’s Guide to Water Rights Law, recognized as the most thorough explanation of California water rights law available to non-lawyers, traces the authority for water flowing in a stream or reservoir, from a faucet or into an irrigation ditch through the complex web of California water rights.

Maps & Posters California Water Bundle

California Water Map
Updated December 2016

A new look for our most popular product! And it’s the perfect gift for the water wonk in your life.

Our 24×36-inch California Water Map is widely known for being the definitive poster that shows the integral role water plays in the state. On this updated version, it is easier to see California’s natural waterways and man-made reservoirs and aqueducts – including federally, state and locally funded projects – the wild and scenic rivers system, and natural lakes. The map features beautiful photos of California’s natural environment, rivers, water projects, wildlife, and urban and agricultural uses and the text focuses on key issues: water supply, water use, water projects, the Delta, wild and scenic rivers and the Colorado River.

Aquapedia background California Water Map

Pacific Flyway

Sacramento National Wildlife RefugeThe Pacific Flyway is one of four major North American migration routes for birds, especially waterbirds, and stretches from Alaska in the north to Patagonia in South America.

Each year, birds follow ancestral patterns as they travel the flyway on their annual north-south migration. Along the way, they need stopover sites such as wetlands with suitable habitat and food supplies. In California, 95 percent of historic wetlands have been lost, yet the Central Valley hosts some of the world’s largest populations of wintering birds. 

Mono Lake

Mono Lake is an inland sea located east of Yosemite National Park near the Nevada border. It became the focus of a major environmental battle from the 1970s to the 1990s.

The lake has a surface area of about 70 square miles and is the second largest lake in California and one of the oldest in North America. Its salty waters occupy former volcanic craters. The old volcanoes contribute to the geology of the lake basin, which includes sulfates, salt and carbonates.

Western Water Excerpt Sue McClurgRita Schmidt Sudman

Remnants of the Past: Management Challenges of Terminal Lakes
Jan/Feb 2005

They are remnants of another time. A time when the Southwest’s climate was much cooler and probably wetter, and large lakes covered vast tracts of land in Nevada, Utah, southeastern Oregon and California’s Eastern Sierra. Beginning some 14,000 years ago, the region’s climate grew warmer and drier, shrinking these lakes’ shorelines and leaving behind an arid landscape dotted with isolated bodies of water including Pyramid Lake, Mono Lake and the Great Salt Lake.

Western Water Magazine

Remnants of the Past: Management Challenges of Terminal Lakes
January/February 2005

This issue of Western Water examines the challenges facing state, federal and tribal officials and other stakeholders as they work to manage terminal lakes. It includes background information on the formation of these lakes, and overviews of the water quality, habitat and political issues surrounding these distinctive bodies of water. Much of the information in this article originated at the September 2004 StateManagement Issues at Terminal Water Bodies/Closed Basins conference.