The Gaums environmental indicators include monitoring air quality around the PCC BakkiSilicon plant. Monitors are located at Húsavíkurhöfði and Héðinsvík. The concentrations of sulfur dioxide, PM 2.5, and PM 10 in the air are monitored. The highest hourly values, highest daily values, and monthly averages are compared to regulatory limit values. Additionally, the number of days per year that the concentrations of these substances exceed the maximum daily limit values is tracked.

In 2023, the concentrations of sulfur dioxide, PM 2.5, and PM 10 never exceeded the regulatory maximum daily limit values.