Singapore adds hourly haze guidance: employers need an operational plan for outdoor workers

A new within-day decision tool

On 20 October 2026 Singapore’s Ministry of Manpower issued additional outdoor-work guidance using one-hour PM2.5 readings. It complements planning based on the PSI forecast. The purpose is to adjust work as conditions change during the day, rather than rely only on yesterday’s plan.

The guidance distinguishes healthy and vulnerable employees and progressively reduces outdoor activity as readings worsen. At the highest band it calls for prohibiting outdoor work for vulnerable employees and minimising it for healthy employees. The detailed annex should be used for the exact thresholds and measures; the two monitoring systems should not be treated as interchangeable scales.

Translate a reading into a responsible decision

The workplace-safety responsibilities framework provides the wider context for employer duties. A monitoring screen is not a control measure by itself. Someone must have responsibility for assessing the work, deciding changes and communicating them to the people affected.

Consider an outdoor maintenance team. A plan should identify the tasks that can be deferred, indoor alternatives, rest arrangements and the decision-maker for stopping or reducing work. It should also address what happens if readings rise while the team is away from the main workplace. A static policy with no operational owner leaves that gap unresolved.

Vulnerability and communication matter

The guidance identifies groups requiring additional precautions, including older employees, pregnant employees and those with chronic heart or lung conditions. The employer needs a suitable process for addressing relevant health needs while handling personal information appropriately. Supervisors should understand the distinction without demanding unnecessary medical disclosure.

Migrant workers may also need instructions in a language they understand and a practical way to raise concerns. Access to a mask does not answer every exposure question. The official material also discusses work adjustments and rest; the control plan should address the activity and conditions, rather than rely on equipment alone.

Preserve evidence if an unsafe instruction is disputed

Keep the date, work location, instruction, relevant monitoring information and the response to any reported concern. A later review needs to establish what was known and what action was taken. Avoid unsupported claims that a particular reading alone proves every element of liability or medical causation.

The update concerns Singapore and does not directly impose its numerical bands on Georgian workplaces. Its broader planning lesson is useful to employers with international teams: review the governing local duty, credible monitoring and the actual exposure. A medical emergency or serious workplace risk requires the appropriate local response.

What the work plan should specify

• Who checks forecasts and one-hour readings, and when.
• Which tasks are reduced, deferred or moved indoors.
• How vulnerable employees and language needs are addressed.
• Who can change the work and how the decision is recorded.

Legal check date

Sources and law checked on 23 October 2026. Later developments are not reflected automatically. Application of the rules depends on the individual facts.