2020年06月30日: 01:00: 29.44mg/L;   03:00: 24.97mg/L;   05:00: 24.15mg/L;   07:00: 28.47mg/L;   09:00: 26.45mg/L;   11:00: 28.45mg/L;   13:00: 25.71mg/L;   15:00: 23.86mg/L;   17:00: 27.74mg/L;   19:00: 24.32mg/L;   21:00: 27.53mg/L;   23:00: 23.81mg/L.