Bartlett Heating and Cooling Inc is ready for your AC repair in Marietta GA.

(770) 429-0278
972 Atlanta Road
Marietta, GA 30060
Small Town Integrity in the Big City
Cobb County State of the Air
Fulton County State of the Air

This information is taken from Amercian Lung Association website:


  1. What do the colors mean?
    They are from the Air Quality Index, shown at right. We compare the monitored data against the Air Quality Index, a color-coded scale that EPA developed to help the public understand daily air pollution forecasts and protect themselves. Each color provides a specific warning about the risk associated with air pollution in that range.

  2. How do we calculate the grades?
    In our analysis of ozone and short-term levels of particle pollution, we assign increasing weights to the days when air pollution levels reach the higher ranges to calculate our grades. We add those together and calculate the weighted average, then assign grades based on that weighted average. For year-round levels of particle pollution, we use annual average levels calculated by EPA. .