Location/area type

ng/m³ mean (range)

Reference

Chicago, IL

8.7 (1.8 - 62.7)

[18]

Lake Michigan

2.3 (1.3 - 4.9)

[17] [18]

South Haven, MI

2.0 (1.8 - 4.3)

[18] [19]

Ann Arbor, MI

2.0 (max. 4.4)

[18] [19]

Detroit, MI Site B

3.7 (max 8.5)

[18]

Underhill Center, VT

2.0 (1.2 - 4.2)

[20]

Broward County, FLBackground Site nearAtlantic Ocean (Site 1)

1.8

[21]

Broward County, FLInland (Site 2)

3.3

[21]

Broward County, FLInland (Site 3)

2.8

[21]

Little Rock Lake, WI

1.6 (1.0 - 2.5)

[22]

Crab Lake, WI

1.7

[23]

French Guiana, Dorlin Camp Hill/Rural

5.4 ± 1.6

[24]

French Guiana, Petie Saut Lake/Rural

2.8 ± 1.4

[24]

French Guiana, Background Levels/Pristine

(1.0 - 4.0)

[24]

Bondville, IL/(background)

2.0 ± 0.5 (1.3 - 3.8)

[25]

Chicago, IL/Urban

3.6 ± 2.9 (1.6 - 22.1)

[25]

Kenosha, WI/Rural

2.2 ± 0.7 (1.1 - 5.7)

[25]

Sleeping Bears Dunes, MI/Rural

2.1 ± 0.7 (1.4 - 5.0)

[25]

South Haven, MI/Rural

2.2 ± 0.7 (1.4 - 6.1)

[25]

France, Champ Sur Drac/Suburban

3.4 ± 3.6 (1.9 - 4.8)

[26]

Antarctica, Neumayer Station/Pristine

1.08 ± 0.29 (0.27 - 2.34)

[27]