water quality

water quality

DWR: Reviving the Golden State’s meadows and watersheds: An essential part of California’s water security

Department of Water Resources (DWR)

September 23, 2025

From the Department of Water Resources: High in the mountains, thousands of feet above where most Californians live, are alpine...

PRESS RELEASE: US EPA Recognizes Yurok Tribe’s sovereignty over water quality and other environmental standards on tribal lands

Policy and regulation

July 31, 2025

Press release from the Yurok Tribe: The United States Environmental Protection Agency (EPA) recently approved the Yurok Tribe Environmental Department’s application for Treatment...

UC DAVIS: Tahoe State of the Lake Report released for 2024

July 18, 2025

Lake Tahoe’s annual health check-up presents long-term trends By Kat Kerlin, UC Davis The UC Davis Tahoe Environmental Research Center...

GRIST: Pollution from wildfires can contaminate our water for up to 8 years, study finds

Wildfires and watersheds

June 27, 2025

An analysis of 500 watersheds found levels of organic carbon, phosphorus, and other pollutants up to 103 times higher after...

EOS: Precipitation Extremes Drive Swings in Lake Tahoe’s UV Exposure

American Geophysical Union

Ecosystems Science

June 26, 2025

An 18-year study reveals dramatic year-to-year variations in ultraviolet radiation penetration tied to Sierra Nevada precipitation cycles. By Andrew Chapman,...

GRIST: Firefighting foams contain toxic PFAS. Could soybeans be the answer?

Wildfires and watersheds

June 24, 2025

By Frida Garza, Grist This story was originally published by Grist. Sign up for Grist’s weekly newsletter here. Jeff King...

GRIST: What will the rise of floating solar panels mean for wildlife?

Planning and management

June 24, 2025

By Matt Simon, Grist This story was originally published by Grist. Sign up for Grist’s weekly newsletter here. The newest,...

NASA Sensor on Space Station Eyes Contamination off California Coast

Science Water quality

June 19, 2025

Proof-of-concept results from the mouth of the Tijuana River in San Diego County show how an instrument called EMIT could...

CAL MATTERS: ‘Not improving’: Lake Tahoe had one of its murkiest years on record

June 17, 2025

By Rachel Becker, CalMatters This story was originally published by CalMatters. Sign up for their newsletters. Lake Tahoe’s iconic blue...

UC DAVIS: Lake Tahoe clarity report: Trend stable, not improving

June 17, 2025

Annual report suggests deep dive into particle science By Kat Kerlin, UC Davis Lake Tahoe’s long-term clarity record is not...

PRESS RELEASE: North Coast Water Board makes historic move with vineyards to protect water quality, safeguard aquatic life

State Water Board

Policy and regulation Water quality

June 16, 2025

North Coast Water Board makes historic move with vineyards to protect water quality, safeguard aquatic life Press release from the...

LAO REPORT: The 2025‑26 Budget: State Mandates—Regional Water Quality Control Boards

Legislative Analyst's Office

Policy and regulation Reports

June 2, 2025

From the Legislative Analyst’s Office: In this post, we discuss the Governor’s May Revision budget proposal to retroactively suspend three...

UC DAVIS: Extreme weather cycles change underwater light at Tahoe

May 22, 2025

UV radiation fluctuates amid wet-dry extremes in clear water bodies By Kat Kerlin, UC Davis Lake Tahoe is experiencing large-scale...

CAL AG: Urban wildfire impacts water, soil and wildlife

UC Ag and Natural Resources (UCANR)

Wildfires and watersheds

April 12, 2025

From California Agriculture: As residents clean up after the Los Angeles County wildfires, the aftermath will continue to impact water...

LAist: How much toxic heavy metal is in that bright red fire retardant? We had it tested to find out

Wildfires and watersheds

April 3, 2025

An LAist investigation found arsenic, cadmium, chromium and lead in samples of fire retardant collected from the Palisades, Eaton and...

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