Unhealthy Air Spans Singapore, Malaysia Amid Haze

Air-quality reports and regulatory notices describe monitoring, public guidance and oversight in several regions. Singapore’s air quality reached unhealthy levels amid smoke drifting from Indonesia, with officials advising residents to check real-time PM2.5 readings and follow activity guidance; a separate explainer distinguishes those hourly readings from the health-based, 24-hour PSI and cautions that third-party indexes may not be comparable. Malaysia’s environment department likewise urged the public to use its official APIMS readings, explaining that other platforms can apply different scales and data sources as many areas recorded unhealthy pollution. In the United States, Iowa opened a comment period on a draft operating permit for an existing food-preparation facility, while the EPA sought public input on its intended approach to designating areas under the revised annual fine-particle standard.