SINGAPORE (Reuters) - Singapore's air pollution rose to levels classified as "unhealthy" on Monday, the government's National Environment Agency said on its website (www.haze.gov.sg).
The 3-hour Pollution Standards Index (PSI) in the city-state rose to as high as 113 at 6 a.m. local time (1800 EDT), and edged down to 111 in the latest reading an hour later.
A PSI reading above 100 indicates that air pollution has reached an "unhealthy" level. Singapore's PSI level hit a record high of 401 in June 2013, when smoke from forests burning in Indonesia engulfed the city.
(Reporting by Rujun Shen; Editing by Paul Tait)