This project aimed to determine the most polluted and unsafe counties in California in the wake of wildfires in 2018 based on inhabitants below the age of 15 and above 55, who are generally more vulnerable to respiratory illness as a result of bad air quality or pollution. It discovered most of the counties with higher level of this “sensitive” population are in the northern parts of the state where pollution levels were high in the Summer and Fall seasons compared to the Winter and Spring.