Stacked Bar chart depicting the tons of NOx emissions every three years from 2008 to 2023. From 2020 forward, the Event emissions are included in the NonPoint category.

  • 2008: approximately 460,000 tons total, comprised of approximately:
    • 4,000 tons from Event sources
    • 85,000 tons from NonPoint sources
    • 47,000 tons from NonRoad sources
    • 190,000 tons from OnRoad sources
    • 134,000 tons from Point sources
  • 2011: approximately 408,000 tons total, comprised of approximately:
    • 7,000 tons from Event sources
    • 85,000 tons from NonPoint sources
    • 42,000 tons from NonRoad sources
    • 178,000 tons from OnRoad sources
    • 96,000 tons from Point sources
  • 2014: approximately 400,000 tons total, comprised of approximately:
    • 9,000 tons from Event sources
    • 89,000 tons from NonPoint sources
    • 36,000 tons from NonRoad sources
    • 158,000 tons from OnRoad sources
    • 108,000 tons from Point sources
  • 2017: approximately 321,000 tons total, comprised of approximately:
    • 19,000 tons from Event sources
    • 80,000 tons from NonPoint sources
    • 34,000 tons from NonRoad sources
    • 109,000 tons from OnRoad sources
    • 79,000 tons from Point sources
  • 2020: approximately 254,000 tons total, comprised of approximately:
    • 83,000 tons from NonPoint sources
    • 28,000 tons from NonRoad sources
    • 68,000 tons from OnRoad sources
    • 76,000 tons from Point sources
  • 2023: approximately 1.6 million tons total, comprised of approximately:
    • 7,000 tons from NonPoint sources
    • 86,000 tons from NonRoad sources
    • 20 tons from OnRoad sources
    • 1.54 million tons from Point sources

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