This project started from November 1st 2018 and will end on October 31th 2020. The first stage was from November 1st 2018 to October 31th 2019. 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 (2018/11/1~2019/10/31), 1342 samples should be accomplished. In the end, 1321 samples were available, 14 samples were failed, and 7 samples were suspended. There are 6 times emergency response actions in first stage. The rate of achievement was 98.4 %. At the Second stage (2019/11/1~2020/10/31), 1342 samples should be accomplished. In the end, 1316 samples were available, 21 samples were failed, and 5 samples were suspended. There are 1 times emergency response actions in first stage. The rate of achievement was 98.1 %. Totally, the project had 2684 samples should be accomplished. In the end, 2637 samples were available, 35 samples were failed, and 12 samples were suspended. The rate of totally achievement was 98.2 %.

monitor, PM2.5, Northern Taiwan