Table: Comparison of air quality standards, ambient air quality in Bangladesh,  and health effects of pollutants.

Pollutant

Averaging

Time

WHO Standards

US Standards

Bangladesh Standards

Ambient Concentration in Dhaka

Major Source

Health Problems

CO

Carbon monoxide

1 hour

30 mg/m3

9 ppm

10 mg/m3

 

11 ppm

(instantaneous average)

Automobile

Hinders O2 transport from blood into tissues, Cardiac

8 hour

10 mg/m3

35 ppm

40 mg/m3

 

Pb

Lead

24 hour

0.5-1. ug/m3

 

 

4.63 ug/m3

Leaded fuel

Hindered neurological development of children and risk of high blood pressures, heart attack for adults

Quarterly

 

1.5 ug/m3

 

 

NO2

Nitrogen dioxide

Annual

 

0.053 ppm

100 ug/m3

80 ug/m3 (Residential)

100 ug/m3 (Commercial)

41.8 ug/m3

 

Respiratory problems and chest pain

24 hour

150 ug/m3

 

 

0.063 ppm

119 ug/m3

O3

Ozone

1 hour

150 - 200 ug/m3

0.12 ppm

235 ug/m3

 

 

 

Respiratory, asthma, eye irritation, heart attack

PM10/TSP/SPM

Annual

60-90 ug/m3

50 ug/m3

200 ug/m3 (Residential)

400 ug/m3 (Commercial)

1245-1601 ug/m3 (Commercial)

445 ug/m3 (Residential)

 

Respiratory, cardiovascular and lung disease, bronchitis

24 hour

150-230 ug/m3

150 ug/m3

 

 

 

SO2

Sulfur dioxide

Annual

40-60 ug/m3

0.03 ppm

80 ug/m3

80 ug/m3 (Residential)

100 ug/m3 (Commercial)

472.9 ug/m3 (Commercial)

63.5 ug/m3 (Residential)

 

Respiratory, chest pain, premature mortality.

24 hour

100-150 ug/m3

0.14 ppm

365 ug/m3

 

 

 

 Note: ug stands for microgram.