What is the difference between SG AQI and Singapore NEA 1-Hour PM2.5?

SG AQI provides real-time international air quality indexing, while Singapore NEA publishes both 1-hour PM2.5 concentrations (in µg/m³) for immediate activity decisions and 24-hour PSI for long-term averaging. For immediate decisions like whether to go for a run or let children play outdoors, the 1-hour PM2.5 and real-time SG AQI are the official recommended benchmarks.

How frequently is the SG haze data updated?

Haze SG data is automatically synchronized every 3 minutes from live station sensor feeds to ensure residents receive near real-time atmospheric updates.

When should Singapore residents wear an N95 mask during haze?

According to Singapore Ministry of Health (MOH) guidelines, healthy individuals commuting outdoors do not require N95 masks when air is Moderate (AQI 100 or 24-hr PSI > 100), N95 masks are recommended for people performing prolonged strenuous outdoor labour.

How does Haze SG ensure compliance with Singapore PDPA?

Haze SG operates with a strict zero personal data collection policy under Singapore's Personal Data Protection Act (PDPA 2012). The site collects zero cookies, requires no user logins or accounts, records zero IP addresses, and does not request physical device GPS location. Inquiries can be sent to contact@hazesg.fyi.com.

Haze SG — Live Singapore Air Quality & NEA PM2.5 Tracker

Q: What SG AQI reading is safe for outdoor workouts and running?

An SG AQI of 0 to 50 (Good) is completely safe for all outdoor running and endurance sports. In the 51 to 100 range (Moderate), normal workouts are acceptable for healthy individuals, but sensitive groups with asthma or respiratory conditions should pace themselves and reduce intense exertion. If SG AQI exceeds 100 (Unhealthy), all strenuous outdoor cardio should be limited or moved indoors.

Q: Which 5 regions are tracked for SG haze?

SG haze is monitored across 5 official Singapore NEA regions: Central (Bishan, Toa Payoh, Marina Bay), North (Woodlands, Yishun, Sembawang), South (Bukit Merah, Queenstown, Sentosa), West (Jurong, Clementi, Tuas), and East (Tampines, Bedok, Changi).

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Singapore Islandwide

Central · North · South · West · East

SG AQI (AIR QUALITY INDEX) Moderate

1-Hour PM2.5

-- µg/m³

Moderate Band

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Outdoor Activities: Moderate / Normal Fine for healthy individuals. Sensitive groups pace strenuous exertion.

Singapore Regional Air Map

Tap any region on the map or top chips to view local SG Haze sensor readings.

24-Hour SG Haze Trend

Singapore Island Average

SG Haze & SG AQI Reference Guide & FAQs

Understanding Singapore air quality benchmarks, 1-Hour PM2.5 concentrations, and official NEA health guidelines.

SG AQI Band	1-Hr PM2.5	Air Quality Level	Healthy Individuals	Sensitive Groups (Asthma/Seniors)
0 – 50	0 – 12 µg/m³	Good / Normal	Normal outdoor activity	Normal outdoor activity
51 – 100	13 – 55 µg/m³	Moderate	Normal outdoor activity	Reduce prolonged strenuous exertion
101 – 150	56 – 150 µg/m³	Unhealthy for Sensitive	Reduce prolonged intense exertion	Avoid prolonged outdoor exertion
151 – 200	151 – 250 µg/m³	Unhealthy	Avoid prolonged outdoor exertion	Minimize outdoor activity; stay indoors

What is the difference between SG AQI and NEA 1-Hour PM2.5? ▾

SG AQI represents real-time international air quality indexing, whereas Singapore NEA provides both 1-hour PM2.5 concentrations (in µg/m³) for immediate activity decisions and 24-hour PSI for retrospective epidemiological averaging. For immediate choices such as going for a run or school PE, the 1-hour PM2.5 and SG AQI ratings provide the most accurate real-time guidance.

What SG AQI reading is safe for outdoor workouts and running? ▾

An SG AQI of 0 to 50 is safe for all intense endurance workouts. Between 51 and 100 (Moderate), healthy individuals can proceed with normal exercise, but sensitive groups with asthma should pace themselves. If SG AQI exceeds 100, strenuous outdoor running should be reduced or moved into an air-conditioned indoor gym.

Which 5 Singapore regions are monitored for SG haze? ▾

SG haze is officially monitored across 5 NEA sectors: Central (Bishan, Toa Payoh, Marina Bay), North (Woodlands, Yishun, Sembawang), South (Bukit Merah, Queenstown, Sentosa), West (Jurong, Clementi, Tuas), and East (Tampines, Bedok, Changi).

When should Singapore residents wear an N95 mask? ▾

According to Ministry of Health (MOH) guidelines, healthy persons generally do not need an N95 mask for short outdoor commutes during Moderate air. N95 masks are recommended when air quality enters the Unhealthy range (AQI > 100 or 24-hr PSI > 100) for individuals who must perform prolonged strenuous outdoor work.