San Francisco Police confront a group of protestors who broke off from a larger rally-march in the MIssion District earlier in the evening that was loud, but largely peaceful.

California has launched the Statewide Mobile Monitoring Initiative, a program that will deploy vehicles to collect air ...

Downtown Grass Valley centers around Mill and Main Streets, where Gold Rush-era buildings have been lovingly maintained while adapting to modern purposes. The iconic Del Oro Theatre stands as a crown ...

The Empire Mine and North Star Mine became two of California’s richest gold-producing operations, creating wealth that built a proper town rather than just a temporary encampment. What’s remarkable ...

The Bay Area Air District Board of Directors has approved sending $4 million to communities around the region to support home and school air filtration ...

Air quality regulators in Southern California have rejected rules that would have curbed harmful emissions from gas-powered ...

Smoke from several Canadian wildfires has drifted into the Bay Area, causing officials to warn of worsening air quality ...

Wildfire smoke drifted from the east, bringing bad air quality to several states across the U.S., including California ...

The South Coast Air Quality Management District is poised to vote on regulations that would limit emissions of nitrogen ...

Air quality alerts advising people to stay indoors were issued earlier in the week and lasted through part of Wednesday ...

The pull of the foul air to Northern California was significant enough that the Bay Area Air District issued an air quality ...

Smoke from Canada wildfires drifted over Northern California on Monday morning and could add a slight orange tint to the sky through Tuesday. A low-pressure system cut off from the storm track was ...