NOTES FOR DATA ON THIS PAGE: Nonattainment areas do not meet the national
primary or secondary ambient air quality standard for the specified pollutant.
Nonattainment areas are classified based on design values: Serious = an area with
a design value of 16.5 parts per million (ppm) and above; Moderate = an area with
a design value of 9.1 up to 16.4 ppm.