Środowisko i energia · 22/06/2010

EPA Revises Primary National Ambient Air Quality Standard for Sulfur Dioxide

The Environmental Protection Agency (EPA) is revising the primary national ambient air quality standard for sulfur dioxide (SO2) to provide adequate protection of public health with a margin of safety, setting a new 1-hour standard at 75 parts per billion (ppb) based on the 3-year average of the annual 99th percentile of 1-hour daily maximum concentrations.