After fires destroyed multiple neighborhoods across Los Angeles County, many residents looked up to find blue, smoke-free skies this week. The Air Quality Index (AQI) — which measures the concentration of pollutants in the air — seemed to confirm all was well in the L.

Air purifiers are a great tool for improving your indoor air quality. You could also invest in a sensor just so you know what you are working with. Adding fans to enclosed areas is another way to prevent irritants like mold from building. Here are 9 products worth investing in if you are worried about the air you breathe:

Calculating air pollution from wildfires and other events has become more complicated. That doesn’t mean it’s necessarily more accurate.

New York State DEC says that poor air quality readings on the iPhone weather app are related to a faulty sensor in Utica.

Smoke from several wildfires in metro Los Angeles negatively affects the air quality of a population of about 18 million people. Air quality in Los Angeles was at "moderate" levels on Thursday morning,

During the wildfires, several communities throughout LA County experienced poor air quality. Chris Chavez, deputy policy director for the Coalition for Clean Air, says many people are now breathing toxic air.

KCRW and R&S Kayne Foundation Los Angeles held a public information panel and Q&A session regarding immediate and long-term health considerations from the fires. Watch in English or Spanish.