Multiple air quality metrics risk confusing public during haze episodes

Minister Grace Fu warned on Tuesday that a proliferation of air quality measurement systems poses challenges for consistent public messaging during periods of severe haze affecting Singapore and the wider region. The minister's comments reflect growing concerns about the clarity of information disseminated to residents when air quality deteriorates due to transboundary pollution. Fu noted that reliance on multiple indicators, each with different thresholds and measurement methodologies, could generate confusion rather than enhance public understanding of haze conditions. The Government has typically relied on the Pollutant Standards Index (PSI) as its primary metric for communicating air quality to the public. However, international standards and alternative measurement systems have increasingly entered public discourse, creating potential for mixed messaging. Fu indicated that streamlining communication channels and standardising the indicators used in public advisories remains an important consideration for policymakers. The minister fielded additional questions regarding Singapore's broader governmental response to haze situations, including coordination with neighbouring countries and preparedness measures for future episodes. Addressing transboundary haze remains a priority for the regional city-state, which experiences seasonal air quality degradation linked to agricultural burning in Indonesia and Malaysia.