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| Annual Emissions Inventory Trends 1 |
| Pollutant (Tons/Yr) |
2002 |
2003 |
2004 |
2005 |
2006 |
2007 |
2008 |
2009 |
2010 |
2011 |
| Particulate Matter < 2.5 microns in diameter 2 |
--- |
--- |
--- |
--- |
10,795 |
11,791 |
11,143 |
10,076 |
9,232 |
9,779 |
| Particulate Matter < 10 microns in diameter |
20,677 |
19,804 |
17,880 |
18,902 |
17,403 |
18,207 |
16,908 |
15,066 |
13,697 |
14,153 |
| Sulfur Dioxide |
183,780 |
199,835 |
189,156 |
195,084 |
186,929 |
189,813 |
162,005 |
123,269 |
132,817 |
126,835 |
| Nitrogen Oxides |
113,025 |
117,834 |
112,705 |
114,542 |
101,272 |
94,397 |
87,417 |
72,559 |
73,116 |
67,124 |
| Volatile Organic Compounds |
27,948 |
27,997 |
25,631 |
30,382 |
28,865 |
26,822 |
22,269 |
19,666 |
20,164 |
20,820 |
| Carbon Monoxide |
36,625 |
34,961 |
45,554 |
52,546 |
52,597 |
55,249 |
52,898 |
46,722 |
48,937 |
39,835 |
| Lead |
8 |
8 |
13 |
10 |
8 |
10 |
6 |
8 |
7 |
6 |
| Ammonia 2 |
--- |
--- |
--- |
--- |
3,985 |
4,011 |
3,420 |
3,219 |
2,946 |
3,484 |
| Total Hazardous Air Pollutants |
10,401 |
8,539 |
7,543 |
8,288 |
9,069 |
8,445 |
7,647 |
6,450 |
6,408 |
6,621 |
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1 Total emissions reported by major point sources subject to Title V of the federal Clean Air Act.
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2 The Iowa Department of Natural Resources started collecting PM2.5 and NH3 emissions data in 2006.
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