Air Quality Trends

• Air Quality Trends HomeOzone Hourly Trend
• Ozone Seasonal Trend
• Ozone Annual Trend
• Ozone Regional Trend
• Ozone Historical Trend
• Particle Pollution Hourly Trend
• Particle Pollution Annual Trend
• Particle Pollution Historical Trend

Ozone Annual Trend

Ozone season is from April through September in the northeast. Since ozone is a ‘summer' phenomena very few monitors in the northeast run year-round. The graph below is from a site that operates year-round. It is quickly evident that ozone levels are good for most of the year. 2002 was chosen because it was a very active summer for ozone. Weather patterns during the summer of 2002 were very favorable for ozone and its pre-cursors to be transported to Maine.

Notice that there is more variability in daily ozone values during the summer.

 

 

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