Location

Benzene Concentration (ug/m³ )

Reference

Mean

Maximum

Houston, Texas, USA (1980)

18.8

122.9

Singh et al. (1982)

Pittsburgh, PA, USA (1981)

16.3

210.6

Singh et al (1982)

Oslo, Norway, (1980)

40.0

114.0

Wathne (1983)

Rhine area, Germany, (1983)

4.6-22.4

-

Bruckman et al. (1983)

Black Forest, Germany (1983)

2.0

-

Bruckman et al. (1983)

London, England (1983)

23.0

85.0

Clark et al. (1984)

Bilthven, Netherlands (1982-83)

2.8

10.4

RIVM (1988)

Delhi, India (1999-2000)

25.0

13.0

75.0

38.0

CPCB Study, 1999-2000

CPCB Study, 2000-2001

Berlin

49.0

Seifert and

(1975-76)

43.4

Ullrich (1978)

68.9

Stockholm (20 min values)

84

Jonsson and Berg (1978)

460

Helsinki (2 h value)

100

Hasanen et al. (1981)

Zurich

188

Grob and Grob (1971)

Belgium (Brussel 68 sites 1994

1.6-11.3

*

Denmark (Copenhagen 1995-96)

1995-96*

Italy (Bari 8 sites 1993)

2.0-4.9

1993*

Germany (13 cities 1993)

2.0-4.9

1993*

Sweden (28 cities winter 1995-96)

2.1-5.0

1995-96*

Netherlands (3 cities 1993-94)

2.4-4.7

1993-94*

U.K.( 6 cities 1994)

2.2-4.8

1994*

US Urban (1987-1990)

4-7

1987-1990*