Section 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

Pollutant	Maximum Allowable Increase (micrograms per cubic meter)
CLASS I
CLASS II
Particulate matter:
PM-10, annual arithmetic mean	17
PM-10, 24-hour maximum	30
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.

History: 2006 AACS; 2012 AACS.