NEA: PSI hits 290 mark at 9pm
The three-hour Pollutant Standards Index (PSI) reading hit 290 at 9pm on Wednesday, hitting the ‘very unhealthy’ level soaring past the 226 recorded in Sept 1997.
The PSI reading has been climbing steadily since Wednesday morning, starting at 77 at 6am before moving into the unhealthy range at 11am when the reading hit 103. It then climbed to 124 at noon, 152 at 1pm, 170 at 2pm, before hitting 172 at 3pm.
Source: Channel News AsiaTags: haze, NEA, PSI, PSI reading, Singapore