Monthly Mean of Rainfall pH Value at CWB Weather Stations in 2017
Month\
Station
Alishan Anbu Chenggong Chiayi Hengchun Hsinchu Hualien Kaohsiung Keelung Kinmen Matsu Penghu Sun Moon Lake Taichung Taipei Tainan Taitung Yilan
1 5.7 4.3 4.8 - 6.7 4.6 5.1 - 3.9 - 4.9 - - - 4.2 - - 4.7
2 5.2 4.6 4.7 - - 4.7 4.8 - 4.4 4.9 4.8 6.7 5.2 5.6 5.0 - 5.7 5.4
3 4.9 4.6 4.4 5.3 5.7 4.6 4.6 5.2 4.3 4.7 4.6 7.2 4.6 5.6 4.6 5.3 5.8 5.0
4 5.1 4.7 4.8 5.7 5.8 4.9 4.7 4.9 4.1 5.2 4.7 5.9 4.9 6.0 4.6 5.6 5.5 4.9
5 5.5 4.9 5.2 6.2 6.1 5.6 5.4 5.1 4.5 5.2 5.0 5.9 5.5 6.3 5.0 6.1 5.9 5.3
6 5.4 5.2 5.6 6.1 5.6 5.7 5.5 5.6 4.7 5.6 5.4 6.2 6.0 6.1 5.1 6.2 6.3 5.4
7 5.3 5.3 5.9 6.2 5.8 5.9 6.0 5.4 4.9 5.7 5.4 6.1 5.7 6.2 5.1 6.2 6.4 5.7
8 5.5 4.7 5.5 6.3 5.7 5.5 5.6 5.5 4.9 6.0 5.0 6.0 6.0 6.3 5.0 6.2 6.2 5.7
9 5.6 4.7 5.4 6.5 5.8 5.5 5.3 5.9 4.7 5.4 4.7 6.3 5.7 6.4 4.9 6.3 6.1 5.5
10 5.7 4.6 5.2 6.7 5.4 5.6 5.4 6.3 4.3 - 5.4 6.5 5.9 6.7 4.9 6.4 6.1 5.6
11 5.7 4.8 5.1 6.5 6.0 5.3 5.5 6.2 4.3 5.4 4.6 5.7 6.5 6.4 5.2 - 6.3 5.4
12
Mean 5.4 4.8 5.1 6.2 5.9 5.3 5.3 5.5 4.4 5.3 4.9 6.2 5.6 6.2 4.9 6.0 6.0 5.3
Max 5.7 5.3 5.9 6.7 6.7 5.9 6.0 6.3 4.9 6.0 5.4 7.2 6.5 6.7 5.2 6.4 6.4 5.7
Min 4.9 4.3 4.4 5.3 5.4 4.6 4.6 4.9 3.9 4.7 4.6 5.7 4.6 5.6 4.2 5.3 5.5 4.7
 

Notes:

  1. "-" indicates no rain or inadequate rainfall.
  2. According to the EPA's regulation, rainfall with pH value below 5.0 is classified as acid rain, indicated by red italics here.
  3. The Central Weather Bureau applies wet deposition method in collecting samples of rainwater from 2005. Prior to 2005, bulk deposition method was used.