Country SO2 NO2 CO O3 TSP PM10 Pb 1 hr 24 hrs Annual 1 hr 24 hrs Annual 1 hr 8 hrs 1 hr 8 hrs 24 hrs Annual 24 hrs Annual 1 hr 24 hrs Annual USA - 0.37 - - - 0.10 0.10 10.0 0.24 - - - 0.15 0.05 - - - Japan 0.26 0.11 - - 0.08 - - 22.8 0.12 - - - - - 0.10 - - Netherlands 0.76 0.23 - 0.18 - - 40.0 6.0 0.12 - - - - - 2.00 - - Australia 0.44 0.16 - 0.30 0.12 - 34.3 11.4 0.24 0.10 - - - - - - - Mexico - - - 0.40 - - - 15.0 - - - - - - - - - Taiwan 0.78 0.26 - - 0.10 - 22.9 - - - - - - - - - - Canada 0.82 0.27 - 0.40 0.20 - 15.0 6.0 0.10 - - - - - - - - Germany 0- 0.27 - 0.20 - 0.80 30.0 - - - - - - - - - 2.00 WHO 0.35 0.13 0.05 0.40 0.15 - 30.0 10.0 0.15 0.10 - - - - - - 0.05 Thailand 0.78 0.30 0.04 0.32 - - 34.2 10.3 0.20 - 0.33 0.10 0.12 0.05 - 1.50 - Air Quality and Noise Management Bureau Tel. 66 2298 2395 Fax. 66 2298 2392 E-mail : aciddep(at)pcd(dot)go(dot)th