California note · Outdoors
Smoke can be local even when the fire is far away
AirNow combines monitors, corrected low-cost sensors, fire layers, and smoke-plume data; nearby readings and trends matter more than one isolated dot.
Smoke is one of those California details that can be confusing from the window. The sky may look hazy, the fire may be far away, and the air may still feel different from one valley or coast basin to the next.
The AirNow Fire and Smoke Map is a practical check for those days. It shows fine particle pollution, called PM2.5, from wildfires and other sources. It mixes permanent and temporary monitors with corrected readings from low-cost sensors, plus fire and smoke layers.
Read the nearby pattern and trend instead of treating one sensor as the whole neighborhood. A satellite smoke plume can be aloft without changing ground-level air, and clouds or darkness can hide plume detection. Use the AQI and local health or school guidance for outdoor plans. The map is not a personal medical answer, but it can show when a lighter plan, different location, or wait-and-see morning makes sense.
Where to see it
AirNow Fire and Smoke Map and AirNow wildfire pages.
Official sources
Official source trail
Reviewed July 14, 2026
California Porch explains the path. The official source is still the place to confirm the current rule, fee, form, map, deadline, or office decision.
Use the official page before you spend money, file paperwork, rely on a deadline, or change a property.
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