Drywall dust can stay in the air for several hours to a few days, depending on various factors. Factors that can affect the duration include the amount of dust generated, ventilation in the area, and the size of the space. It is important to note that drywall dust particles are very fine and can easily be inhaled, posing health risks. To minimize the amount of dust in the air, it is recommended to use proper containment measures such as plastic sheeting and tape off the work area, as well as using air filters or fans to improve ventilation. Additionally, wearing a dust mask and protective eyewear is crucial when working with drywall to prevent inhalation or eye irritation. Regularly cleaning surfaces and using a wet cloth or mop to minimize dust resettlement can also help maintain air quality.