AMBIENT AIR QUALITY AT B

AMBIENT AIR QUALITY AT B.S.Z. MARG

(ITO INTERSECTION), DELHI

PERIOD: MONDAY, OCTOBER 09, 2005, TO SUNDAY,

OCTOBER 15, 2006

Date Parameters	Standard	09/10/2006	10/10/2006	11/10/2006	12/10/2006	13/10/2006	14/10/2006	15/10/2006
Sulphur Dioxide (SO₂) 24 Hourly Average	80	16	12	14	21	17	17	14
Nitrogen Dioxide (NO₂) 24 Hourly Average	80	72	75	81	103	80	83	80
Suspended Particulate Matter (SPM) 24 Hourly Average	200	410	486	513	527	549	490	458
Respirable Suspended Particulate Matter (RSPM) (24 Hr. Avg.)	100	98	320	288	251	136	214	199
Carbon Monoxide (CO) 0600-1400 1400-2200 2200-0600 8 Hourly Average	2000	1639	1811	1730	1616	1845	1857	1627
		1902	1925	1960	3919	2384	2361	1616
		1398	1341	1639	6865	1834	2120	1627
Ozone (O₃) Hourly Minimum Maximum		BDL	BDL	BDL	BDL	BDL	BDL	BDL
Ozone (O₃) Hourly Minimum Maximum		22	38	36	40	54	51	45

Note: 1. All values expressed in mg/m³ (microgram per cubic meter).

2. BDL = Ozone below 20 µg/m³