Contaminant  U.S.
Q1/03		 U.S.
Q2/03		 U.S.
Q3/03		 Japan
Q1/03		 China
Q3/03		 Taiwan
Q1/03		 Europe
Q2/03		 Korea
Q3/03
NH3 (ppbv)
16.1
2.7
7.7
6.9
19.0
9.0
26.2
16.9
Acids/SO2 (ppbv)
0.4
1.5
0.8
0.4
0.7
1.0
1.0
0.3
Organics (ppbv)
17.0
107.0
18.2
—
27.0
24.0
33.0
33.5
Table I: Air-sampling results obtained in 2003 from several fabs worldwide. "Organics" refers to condensable organic species, not total volatile organic compounds.