Key keywords: Sacramento Valley air quality, Woodside Fire smoke impact, Northern California wildfire smoke interactive map, Bay Area wildfire PM2.5 levels, California Air Resources Board air quality monitoring, wildfire smoke long-range transport, San Francisco Peninsula wildfire air pollution impacts The newly launched interactive map, jointly developed by the California Air Resources Board (CARB) and the Northern California Air Quality Management District (NCAQMD), delivers real-time, hyper-local data showing exactly how smoke from the ongoing coastal Woodside Fire in San Mateo County is degrading air quality across every region of the Sacramento Valley. As of October 12, 2024, the Woodside Fire has burned over 2,100 acres of forested land on the San Francisco Peninsula, with Cal Fire crews reporting 32% containment as of Wednesday morning. Persistent northwesterly winds over the past 48 hours have pushed thick plumes of smoke eastward across the Coast Ranges, settling over the low-lying Sacramento Valley and triggering sharp spikes in fine particulate matter (PM2.5) concentrations in more than 40 communities across 8 counties. The map includes multiple user-focused features: real-time PM2.5 readings from 127 ground monitoring stations spread across the valley, 24-hour average concentration heatmaps, 72-hour smoke plume trajectory forecasts, and color-coded air quality alerts aligned with U.S. EPA safety standards. As of Wednesday afternoon, parts of Yolo, Sutter, and Placer counties recorded 24-hour average PM2.5 levels as high as 131 μg/m³, more than 3.5 times the EPA’s 24-hour safe exposure limit of 35 μg/m³. Even areas as far north as southern Butte County have reported moderate to unhealthy air quality for sensitive groups, including children, elderly residents, pregnant people, and those with preexisting respiratory or cardiovascular conditions. Users can input their residential zip code into the map interface to access neighborhood-specific air quality data, customized safety recommendations, and updates on scheduled smoke dispersion mitigation efforts. Local public health officials have advised all valley residents to limit outdoor physical activity during peak smoke hours between 10 a.m. and 4 p.m., keep windows and doors closed, and use HEPA air purifiers indoors whenever possible. School districts across 6 counties in the valley have already canceled all outdoor sports practices and recess activities for the rest of the week, based on the forecast data provided by the map. Cal Fire officials noted that while containment efforts for the Woodside Fire are progressing faster than expected, current wind patterns are expected to remain consistent through the end of the week, meaning smoke impacts on the Sacramento Valley will likely persist until at least October 15. Residents are encouraged to check the map twice daily for updated readings and safety guidance.