Arsenic contents reported in ambient air/particulate matter (PM) over the world^a.

Site	Particulate (n)	Concentration range (mean)	Source type	Ref
Berlin Museum, Germany	Ambient air/dust (30)	Max, 48 ng m−3/3507 mg kg−1	Anthropogenic	104
Cornwall, UK	Household dust (99)	3–1079 (84) mg kg−1	Anthropogenic, natural	114
Los Angeles, USA	PM2.5 (16)	As(iii)/As(v) = <1.2–44.0 (7.4 ± 10.4)/<0.99–18.7 (5.2 ± 4.6) ng m−3	Anthropogenic	117
Huelva, Spain	PM10	As(v)/As(iii) = (1.2–2.1)/(6.5–7.8) ng m−3	Anthropogenic	118
Canada	PM10	0.3 μg m−3	Anthropogenic	120
Foshan, Hangzhou, Harbin, Yinchuan and Zhengzhou, China	PM10	96.9–185.2 ng m−3	Anthropogenic	105
Tainan, Taiwan	PM2.5/PM10–2.5/SPM (180)	1.09–9.51/.18–4.14/0.99–2.85 (1.94) ng m−3 22.7–155.8 (96.7) ng g−1	Anthropogenic, natural	119 and 106
Beijing, China	PM2.5/PM10	8.1–128 (43.5 ± 28.0)/10–73.4 (61.8 ± 49.7) ng m−3	Anthropogenic	115
AlaShan, China	PM2.5/PM10	1.0–9.8 (3.7 ± 2.2)/1.1–12.4(5.4 ± 3.0) ng m−3	Anthropogenic	115
Seoul, South Korea	PM2.5/PM10	1.9–27.0 (9.0 ± 6.4)/2.8–216.4(34.4 ± 58.9) ng m−3	Anthropogenic, natural	115
Gosan, South Korea	PM2.5/PM10	0–8.9(1.7 ± 1.9)/0.2–6.8 (2.2 ± 2.0) ng m−3	Anthropogenic, natural	115
Wuhan, China	PM2.5 (579)	6.81–10.7 ng m−3	Anthropogenic	113
Hyderabad, India	PM10 and PM2.5 (72)	0.866 and 0.0022 μg m−3	Anthropogenic	107
Raipur, India	PM10 (24)	5–47 (7 ± 1) ng m−3	Anthropogenic	108
Ambagarh, Rajnandgaon, India	Road dust (13)	165–329 (238 ± 29) mg kg−1	Anthropogenic	116
Baoji, China	Road dust	9.0–42.8 (19.8) mg kg−1	Anthropogenic	112
China	SPM (918)	8.67–20.5 (11.7) ng m−3	Anthropogenic	121
Dhaka, Bangladesh	SPM (8)	1.50–4.20 (3.06) ng m−3	Anthropogenic	109
Lahore, Pakistan	SPM (20)	1140–1600 ng m−3	Anthropogenic	110
Kolkata, India	Street dust (9)	<2–18.71 (7.96 ± 0.95) mg kg−1	Anthropogenic	111

^aSPM = suspended particulate matter, PM₁₀ = coarse particulate matter, PM_2.5 = fine particulate matter.