How is attainment of the National Ambient Air Quality Standard (NAAQS) for ozone determined using monitoring data?
The federal Clean Air Act (CAA) established timeframes and milestones for states to meet and maintain National Ambient Air Quality Standards (NAAQS) for criteria pollutants1. US EPA sets the NAAQS levels to protect public health and the environment. Each state, including Massachusetts, is required to monitor the ambient air to determine whether it meets each standard. Each monitoring site is required to achieve 75% or greater data capture for the year in order for the data from the monitoring site to be considered valid in the attainment demonstration. To attain the ozone standard, the 3-year average of the fourth-highest daily maximum 8-hour average ozone concentrations measured at each monitor within an area over each year must not exceed 0.075 ppm (effective May 27, 2008). If the air quality does not meet a standard, the state must develop and implement pollution control strategies to attain that standard. Once air quality meets a standard, a state must develop a plan to maintain th
The federal Clean Air Act (CAA) established timeframes and milestones for states to meet and maintain National Ambient Air Quality Standards (NAAQS) for criteria pollutants1. US EPA sets the NAAQS levels to protect public health and the environment. Each state, including Massachusetts, is required to monitor the ambient air to determine whether it meets each standard. Each monitoring site is required to achieve 75% or greater data capture for the year in order for the data from the monitoring site to be considered valid in the attainment demonstration. To attain the ozone standard, the 3-year average of the fourth-highest daily maximum 8-hour average ozone concentrations measured at each monitor within an area over each year must not exceed 0.075 ppm (effective May 27, 2008). If the air quality does not meet a standard, the state must develop and implement pollution control strategies to attain that standard. Once air quality meets a standard, a state must develop a plan to maintain th
The federal Clean Air Act (CAA) established timeframes and milestones for states to meet and maintain National Ambient Air Quality Standards (NAAQS) for criteria pollutants. US EPA sets the NAAQS levels to protect public health and the environment. Each state, including Massachusetts, is required to monitor the ambient air to determine whether it meets each standard. Each monitoring site with Federal Reference Method (FRM) monitors is required to achieve 75% or greater data capture for the year in order for the data from the monitoring site to be considered valid in the attainment demonstration. To attain the ozone standard, the 3-year average of the fourth-highest daily maximum 8-hour average ozone concentration measured at each monitor within an area over each year must not exceed 0.075 ppm (effective May 27, 2008). If the air quality does not meet a standard, the state must develop and implement pollution control strategies to attain that standard. Once air quality meets a standard,
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