Table 5.
AOD within 0.1° radius of ITO and other pollutants (monitored by CPCB) at ITO in the pre- and post-regulation periods.
| Time/shift | 2000–2002 (pre- and regulation implementation period) | 2003–2005 (post-regulation period) | 2000–2002 to 2003–2005 (pre- and post-regulation difference) | |
|---|---|---|---|---|
| AOD (τ) | 10:30 ± 0:30 | 0.80 (± 0.02) | 0.71 (± 0.02) | −0.091 (± 0.060) |
| SO2 μg m−3 (95% CI) | 6:00–14:00 | 13.4 (± 0.3) | 9.1 (± 0.2) | −4.3 (± 0.8) |
| 14:00–22:00 | 17.5 (± 0.5) | 10.3 (± 0.3) | −7.2 (± 1.1) | |
| 22:00–6:00 (next day) | 12.7 (± 0.4) | 8.3 (± 0.2) | −4.4 (± 0.9) | |
| NO2 μg m−3 (95% CI) | 6:00–14:00 | 63.6 (± 1.1) | 89.0 (± 1.4) | 25.4 (± 3.5) |
| 14:00–22:00 | 81.0 (± 1.4) | 104.1 (± 1.7) | 23.1 (± 4.3) | |
| 22:00–6:00 (next day) | 63.2 (± 1.2) | 88.4 (± 1.7) | 25.2 (± 4.0) | |
| PM10 μg m−3 (95% CI) | 6:00–14:00 | 218.7 (± 5.9) | 248.1 (± 6.5) | 29.4 (± 17.5) |
| 14:00–22:00 | 248.0 (± 6.9) | 262.1 (± 7.1) | 14.1 (± 19.8) | |
| 22:00–6:00 (next day) | 238.1 (± 7.9) | 256.7 (± 7.8) | 18.6 (± 22.5) | |
| 24 h average | 234.7 (± 5.8) | 256.2 (± 6.1) | 21.4 (± 16.8) | |
| TSP | 6:00–14:00 | 534.7 (± 12.7) | 526.2 (± 11.2) | −8.5 (± 34.3) |
| μg m−3 (95% CI) | 14:00–22:00 | 607.0 (± 13.9) | 556.9 (± 11.7) | −50.2 (± 36.9) |
| 22:00–6:00 (next day) | 523.8 (± 13.9) | 508.8 (± 13.4) | −15.0 (± 38.8) | |
| 24 h average | 554.7 (± 11.3) | 528.9 (± 9.9) | −25.8 (± 30.4) |