This project started from November 1st 2020 and will end on October 31th 2022. The project goal is using manual method (NIEA A205) to monitor PM2.5 in Northern Taiwan at 11 monitoring stations: Keelung(station number:001), Xizhi(station number:002), Banqiao(station number:006), Shilin(station number:011), Wanhua(station number:013), Taoyuan(station number:017), Pingzhen(station number:020), Hualien(station number:063), Yangming(station number:064), Yilan(station number:065) and Matsu(station number:075). The PM2.5 samples were collected once every 3 days with 24hr sampling time continuously from 00:00 to 24:00 on designated day, simultaneously at all stations. Some rules should be followed: (1) Before sampling start, filters should be set up in samplers within 12 hours. (2) From the end of sampling, filters should be taken out from samplers within 12 hours. (3) All samples should get in to lab (SGS) within 24 hours after drawn out form samplers. At the first stage (2020/11/1~2021/10/31), 1342 samples should be accomplished. In the end, 1311 samples were available, 26 samples were failed, and 5 samples were suspended. There are 2 times emergency response actions in first stage. The rate of achievement was 97.8 %. At the Second stage (2021/11/1~2022/10/31), 1331 samples should be accomplished. In the end, 1314 samples were available, 10 samples were failed, and 7 samples were suspended. There are 8 times emergency response actions in second stage. The rate of achievement was 98.7 %. Totally, the project had 2673 samples should be accomplished. In the end, 2625 samples were available, 36 samples were failed, and 12 samples were suspended. The rate of totally achievement was 98.2 %.

PM2.5, Monitoring, Northern Taiwan