• Latest 24-hour Average O₃ Concentration (ppm)

    • <0.02
    • <0.04
    • <0.06
    • <0.07
    • <0.09
    • <0.11
    • <0.13
    • <0.15
    • ≥0.15

  • 2018 Estimated NOₓ Emissions (Tg/year) from Total Sectors

    • ≤3.7 x 10^-8
    • ≤3.7 x 10^-7
    • ≤3.7 x 10^-5
    • ≤3.7 x 10^-4
    • ≤3.7 x 10^-3
    • ≤3.7 x 10^-1