R 336.2803 Ambient air increments

Rule 1803. In areas designated as class I, II, or III, increases in pollutant concentration over the baseline concentration shall be limited to all of the following: Table 182 Ambient Air Increments Pollutant Maximum Allowable Increase (micrograms per cubic meter) CLASS I Particulate matter: PM-10, annual arithmetic mean 4 PM-10, 24-hour maximum 8 PM 2.5, annual arithmetic mean 1 PM 2.5, 24-hour maximum 2 Sulfur dioxide: Annual arithmetic mean 2 24-hour maximum 5 3-hour maximum 25 Nitrogen dioxide: Annual arithmetic mean 2.5 CLASS II Particulate matter: PM-10, annual arithmetic mean 17 PM-10, 24-hour maximum 30 Pollutant Maximum Allowable Increase (micrograms per cubic meter) CLASS I PM 2.5, annual arithmetic mean 4 PM 2.5, 24-hour maximum 9 Sulfur dioxide: Annual arithmetic mean 20 24-hour maximum 91 3-hour maximum 512 Nitrogen dioxide: Annual arithmetic mean 25 CLASS III Particulate matter: PM-10, annual arithmetic mean 34 PM-10, 24-hour maximum 60 PM 2.5, annual arithmetic mean 8 PM 2.5, 24-hour maximum 18 Sulfur dioxide: Annual arithmetic mean 40 24-hour maximum 182 3-hour maximum 700 Nitrogen dioxide: Annual arithmetic mean 50 For any period other than an annual period, the applicable maximum allowable increase may be exceeded during 1 period per year at any 1 location.