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Ambient Air quality Monitoring Guidlines. - Maharashtra Pollution ...

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Concentration<br />

(µg/m 3 )<br />

2.2.3 Long Term Variations<br />

Status and Trend in annual average concentration of respirable suspended particulate<br />

matter (RSPM) in residential areas, industrial areas and traffic intersection area is<br />

shown in Fig.2.4. RSPM levels measured at traffic intersection have decreased during<br />

2001 as compared to previous years. RSPM levels at locations in residential areas and<br />

traffic intersection were higher than the NAAQS (annual average) during 2001.<br />

Concentration (µg/m3)<br />

400<br />

350<br />

300<br />

250<br />

200<br />

150<br />

100<br />

50<br />

0<br />

400<br />

350<br />

300<br />

250<br />

200<br />

150<br />

100<br />

50<br />

0<br />

Figure 2.3: Monthly Average Concentrations of<br />

RSPM (1999-2001) at BSZ Marg, New Delhi.<br />

Traff. Int. Res. Areas<br />

Ind. Areas NAAQS (Res. Areas)<br />

NAAQS (Ind. Areas)<br />

Months<br />

1998 1999 2000 2001<br />

Year<br />

January<br />

February<br />

March<br />

April<br />

May<br />

June<br />

July<br />

August<br />

September<br />

October<br />

November<br />

December<br />

Fig. 2.4: Trend in Annual Average Concentration of<br />

Respirable Suspended Particulate Matter in Delhi.<br />

68

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