Air Pollutants Sources in Winter in Chang-Zhu-Tan Region of China

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Pollution</td><td class="align_center">Daily average concentration (<i>μ</i>g/m³)</td><td class="align_center">National secondary standard limit</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">CO</td><td class="align_center">0.93</td><td class="align_center">4</td></tr><tr><td class="align_left">NO<sub>2</sub></td><td class="align_center">34.77</td><td class="align_center">40</td></tr><tr><td class="align_left">SO<sub>2</sub></td><td class="align_center">7.78</td><td class="align_center">150</td></tr><tr><td class="align_left">PM2.5</td><td class="align_center">59.43</td><td class="align_center">75</td></tr><tr><td class="align_left">PM10</td><td class="align_center">60.26</td><td class="align_center">150</td></tr><tr><td class="align_left">O<sub>3</sub></td><td class="align_center">55.70</td><td class="align_center">160</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Daily average concentration of pollutants in winter of 2019 in Chang-Zhu-Tan.</div>

Advances in Meteorology

Air Pollutants Sources in Winter in Chang-Zhu-Tan Region of China

Table 3