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Which haze index should employers monitor so as to decide what measures to take to protect their workers?

Employers should refer to the 24-hr PSI forecast on the NEA website, as well as the updated health advisories on the NEA website ( or the Haze website (

The impact on one’s health is dependent on the quality of air, duration of exposure and one’s health conditions. Employers can take reference from MOM’s guideline to employers, available on MOM’s website ( and the Haze website ( for general measures to minimise or mitigate the effects of haze on their employees. Additional measures specific to the work requirements and health conditions of the employees would have to be instituted based on the risk as assessed by the employers.