SmogRank / Singapore

Air quality in Queenstown Estate

Singapore. PM2.5 from 13 low-cost sensors, updated hourly.

35.5 µg/m³
Unhealthy for sensitive groups

Latest hour (08:00 UTC), 2.4× the WHO 24-hour guideline.

Rank

24 h
–
not enough data
7 days
#17
of 2,333 · 57.1 µg/m³
30 days
#28
of 2,331 · 44.7 µg/m³
Year
–
not enough data

Why it ranks here

Unusually bad for Queenstown Estate. The last 7 days averaged 57.1 µg/m³, about 3.3× its typical day (17.1). A jump like this usually has a short-lived cause: likely smoke from fires, dust, or stagnant weather trapping local emissions.

Likely fire smoke. On Sep 29, when Queenstown Estate averaged 87.6 µg/m³ (its typical day: 17.1), NASA satellites detected 206 fires within 300 km (6 within 100 km). Smoke from those fires is a likely contributor; we don't check which way the wind blew, and mapped smoke can be high above the ground.

Based on Queenstown Estate's own measurements, with fire detections from NASA FIRMS and smoke maps from NOAA HMS; causes are the usual kinds for a pattern like this, not a confirmed source.

Last 4 days, hour by hour

15512026-10-01 00:00 UTC: 39.2 µg/m³2026-10-01 01:00 UTC: 44.6 µg/m³2026-10-01 02:00 UTC: 50.8 µg/m³2026-10-01 03:00 UTC: 48.0 µg/m³2026-10-01 04:00 UTC: 43.5 µg/m³2026-10-01 05:00 UTC: 39.7 µg/m³2026-10-01 06:00 UTC: 46.2 µg/m³2026-10-01 07:00 UTC: 32.0 µg/m³2026-10-01 08:00 UTC: 35.5 µg/m³Sep 28Sep 29Sep 30Oct 1

Times in UTC. Dashed line: WHO 24-hour guideline (15 µg/m³).

Every day for a year

SepNovDecJanFebMarAprMayJunJulAugSepMonWedFri2025-09-29: 7.3 µg/m³2025-09-30: 12.7 µg/m³2025-10-01: 11.8 µg/m³2025-10-02: 17.2 µg/m³2025-10-03: 15.7 µg/m³2025-10-04: 11.9 µg/m³2025-10-05: 17.9 µg/m³2025-10-06: no data2025-10-07: no data2025-10-08: 19.2 µg/m³2025-10-09: no data2025-10-10: 13.9 µg/m³2025-10-11: no data2025-10-12: no data2025-10-13: 21.3 µg/m³2025-10-14: 17.5 µg/m³2025-10-15: 12.1 µg/m³2025-10-16: 17.3 µg/m³2025-10-17: no data2025-10-18: 15.6 µg/m³2025-10-19: no data2025-10-20: no data2025-10-21: no data2025-10-22: 7.7 µg/m³2025-10-23: 8.0 µg/m³2025-10-24: no data2025-10-25: no data2025-10-26: 11.7 µg/m³2025-10-27: no data2025-10-28: no data2025-10-29: no data2025-10-30: no data2025-10-31: 22.0 µg/m³2025-11-01: 19.7 µg/m³2025-11-02: no data2025-11-03: no data2025-11-04: 22.4 µg/m³2025-11-05: 17.3 µg/m³2025-11-06: 15.6 µg/m³2025-11-07: 13.8 µg/m³2025-11-08: 17.4 µg/m³2025-11-09: 22.7 µg/m³2025-11-10: 13.3 µg/m³2025-11-11: 21.3 µg/m³2025-11-12: no data2025-11-13: no data2025-11-14: no data2025-11-15: no data2025-11-16: 13.6 µg/m³2025-11-17: 15.4 µg/m³2025-11-18: 20.6 µg/m³2025-11-19: 13.1 µg/m³2025-11-20: 12.0 µg/m³2025-11-21: 12.0 µg/m³2025-11-22: 8.5 µg/m³2025-11-23: no data2025-11-24: 9.1 µg/m³2025-11-25: 8.6 µg/m³2025-11-26: 11.3 µg/m³2025-11-27: 11.6 µg/m³2025-11-28: no data2025-11-29: 12.0 µg/m³2025-11-30: 21.7 µg/m³2025-12-01: 26.9 µg/m³2025-12-02: 15.7 µg/m³2025-12-03: 23.1 µg/m³2025-12-04: 17.9 µg/m³2025-12-05: 16.2 µg/m³2025-12-06: 10.4 µg/m³2025-12-07: no data2025-12-08: 12.6 µg/m³2025-12-09: no data2025-12-10: no data2025-12-11: no data2025-12-12: 18.6 µg/m³2025-12-13: no data2025-12-14: 9.8 µg/m³2025-12-15: no data2025-12-16: 9.0 µg/m³2025-12-17: no data2025-12-18: no data2025-12-19: no data2025-12-20: no data2025-12-21: 8.3 µg/m³2025-12-22: 9.3 µg/m³2025-12-23: no data2025-12-24: no data2025-12-25: no data2025-12-26: 9.8 µg/m³2025-12-27: 9.2 µg/m³2025-12-28: 7.9 µg/m³2025-12-29: no data2025-12-30: 13.3 µg/m³2025-12-31: 16.8 µg/m³2026-01-01: 17.5 µg/m³2026-01-02: 17.1 µg/m³2026-01-03: 13.4 µg/m³2026-01-04: no data2026-01-05: 10.4 µg/m³2026-01-06: 11.1 µg/m³2026-01-07: no data2026-01-08: 13.8 µg/m³2026-01-09: no data2026-01-10: 17.0 µg/m³2026-01-11: 16.3 µg/m³2026-01-12: 12.7 µg/m³2026-01-13: 20.9 µg/m³2026-01-14: 14.3 µg/m³2026-01-15: 19.5 µg/m³2026-01-16: 19.0 µg/m³2026-01-17: 19.1 µg/m³2026-01-18: 19.0 µg/m³2026-01-19: 14.4 µg/m³2026-01-20: 18.1 µg/m³2026-01-21: no data2026-01-22: 15.4 µg/m³2026-01-23: 10.3 µg/m³2026-01-24: 8.8 µg/m³2026-01-25: 16.7 µg/m³2026-01-26: no data2026-01-27: 10.2 µg/m³2026-01-28: no data2026-01-29: 9.6 µg/m³2026-01-30: 10.7 µg/m³2026-01-31: 11.8 µg/m³2026-02-01: 14.9 µg/m³2026-02-02: 16.8 µg/m³2026-02-03: 14.5 µg/m³2026-02-04: no data2026-02-05: 12.1 µg/m³2026-02-06: 12.9 µg/m³2026-02-07: 20.1 µg/m³2026-02-08: no data2026-02-09: no data2026-02-10: no data2026-02-11: no data2026-02-12: 11.5 µg/m³2026-02-13: 13.9 µg/m³2026-02-14: 15.9 µg/m³2026-02-15: 10.1 µg/m³2026-02-16: no data2026-02-17: no data2026-02-18: no data2026-02-19: no data2026-02-20: 12.5 µg/m³2026-02-21: 12.6 µg/m³2026-02-22: no data2026-02-23: no data2026-02-24: 19.0 µg/m³2026-02-25: 23.0 µg/m³2026-02-26: 16.4 µg/m³2026-02-27: 15.1 µg/m³2026-02-28: no data2026-03-01: 20.6 µg/m³2026-03-02: 20.0 µg/m³2026-03-03: 20.5 µg/m³2026-03-04: 18.8 µg/m³2026-03-05: 18.7 µg/m³2026-03-06: 16.1 µg/m³2026-03-07: 15.1 µg/m³2026-03-08: 14.7 µg/m³2026-03-09: 18.5 µg/m³2026-03-10: 18.0 µg/m³2026-03-11: 18.5 µg/m³2026-03-12: 15.6 µg/m³2026-03-13: 11.4 µg/m³2026-03-14: 11.5 µg/m³2026-03-15: no data2026-03-16: 18.2 µg/m³2026-03-17: 18.9 µg/m³2026-03-18: 18.9 µg/m³2026-03-19: 22.3 µg/m³2026-03-20: 19.0 µg/m³2026-03-21: 17.6 µg/m³2026-03-22: no data2026-03-23: no data2026-03-24: 17.4 µg/m³2026-03-25: no data2026-03-26: 21.8 µg/m³2026-03-27: no data2026-03-28: no data2026-03-29: no data2026-03-30: 30.0 µg/m³2026-03-31: 25.3 µg/m³2026-04-01: no data2026-04-02: 23.7 µg/m³2026-04-03: no data2026-04-04: no data2026-04-05: no data2026-04-06: no data2026-04-07: no data2026-04-08: no data2026-04-09: no data2026-04-10: no data2026-04-11: no data2026-04-12: no data2026-04-13: no data2026-04-14: no data2026-04-15: no data2026-04-16: no data2026-04-17: no data2026-04-18: no data2026-04-19: no data2026-04-20: no data2026-04-21: no data2026-04-22: no data2026-04-23: no data2026-04-24: no data2026-04-25: no data2026-04-26: 19.2 µg/m³2026-04-27: no data2026-04-28: no data2026-04-29: no data2026-04-30: no data2026-05-01: 18.2 µg/m³2026-05-02: no data2026-05-03: no data2026-05-04: no data2026-05-05: no data2026-05-06: no data2026-05-07: no data2026-05-08: no data2026-05-09: no data2026-05-10: 12.6 µg/m³2026-05-11: 17.3 µg/m³2026-05-12: 10.9 µg/m³2026-05-13: no data2026-05-14: no data2026-05-15: no data2026-05-16: no data2026-05-17: no data2026-05-18: no data2026-05-19: no data2026-05-20: no data2026-05-21: 12.4 µg/m³2026-05-22: no data2026-05-23: 24.3 µg/m³2026-05-24: no data2026-05-25: no data2026-05-26: no data2026-05-27: no data2026-05-28: no data2026-05-29: no data2026-05-30: no data2026-05-31: no data2026-06-01: no data2026-06-02: 18.8 µg/m³2026-06-03: no data2026-06-04: no data2026-06-05: no data2026-06-06: no data2026-06-07: no data2026-06-08: no data2026-06-09: no data2026-06-10: no data2026-06-11: no data2026-06-12: no data2026-06-13: no data2026-06-14: no data2026-06-15: no data2026-06-16: no data2026-06-17: no data2026-06-18: no data2026-06-19: no data2026-06-20: no data2026-06-21: no data2026-06-22: no data2026-06-23: no data2026-06-24: no data2026-06-25: no data2026-06-26: no data2026-06-27: no data2026-06-28: 9.7 µg/m³2026-06-29: 9.7 µg/m³2026-06-30: 11.2 µg/m³2026-07-01: 20.8 µg/m³2026-07-02: no data2026-07-03: no data2026-07-04: no data2026-07-05: no data2026-07-06: no data2026-07-07: no data2026-07-08: no data2026-07-09: no data2026-07-10: no data2026-07-11: no data2026-07-12: 26.5 µg/m³2026-07-13: no data2026-07-14: 21.2 µg/m³2026-07-15: 15.9 µg/m³2026-07-16: no data2026-07-17: no data2026-07-18: no data2026-07-19: no data2026-07-20: no data2026-07-21: no data2026-07-22: no data2026-07-23: no data2026-07-24: no data2026-07-25: no data2026-07-26: no data2026-07-27: no data2026-07-28: no data2026-07-29: no data2026-07-30: no data2026-07-31: no data2026-08-01: no data2026-08-02: no data2026-08-03: no data2026-08-04: no data2026-08-05: no data2026-08-06: no data2026-08-07: no data2026-08-08: no data2026-08-09: no data2026-08-10: no data2026-08-11: no data2026-08-12: 25.0 µg/m³2026-08-13: no data2026-08-14: 27.7 µg/m³2026-08-15: 28.6 µg/m³2026-08-16: no data2026-08-17: no data2026-08-18: no data2026-08-19: 7.4 µg/m³2026-08-20: no data2026-08-21: no data2026-08-22: no data2026-08-23: no data2026-08-24: 32.3 µg/m³2026-08-25: no data2026-08-26: 18.1 µg/m³2026-08-27: no data2026-08-28: 25.7 µg/m³2026-08-29: no data2026-08-30: no data2026-08-31: 18.2 µg/m³2026-09-01: 24.6 µg/m³2026-09-02: 9.9 µg/m³2026-09-03: 30.8 µg/m³2026-09-04: 43.5 µg/m³2026-09-05: 32.3 µg/m³2026-09-06: 35.7 µg/m³2026-09-07: 23.9 µg/m³2026-09-08: 29.3 µg/m³2026-09-09: no data2026-09-10: no data2026-09-11: no data2026-09-12: no data2026-09-13: 45.0 µg/m³2026-09-14: 81.4 µg/m³2026-09-15: 52.2 µg/m³2026-09-16: 41.0 µg/m³2026-09-17: 51.0 µg/m³2026-09-18: 34.5 µg/m³2026-09-19: 72.1 µg/m³2026-09-20: 47.2 µg/m³2026-09-21: 41.0 µg/m³2026-09-22: 29.2 µg/m³2026-09-23: 38.0 µg/m³2026-09-24: 37.7 µg/m³2026-09-25: 40.5 µg/m³2026-09-26: 63.6 µg/m³2026-09-27: 47.6 µg/m³2026-09-28: 73.2 µg/m³2026-09-29: 87.6 µg/m³2026-09-30: 49.7 µg/m³
Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data

108 of 170 measured days were over the WHO 24-hour guideline.

Daily world rank

#1#1305OctNovDecJanFebMarAprMayJunJulAugSep

Rank on each day's board (1 = most polluted city that day).

2026 against 2025, month by month

15Jan 2026: 14.7 µg/m³JanFeb 2026: 15.1 µg/m³FebMar 2026: 18.6 µg/m³MarAprMayJunJulAugSep 2026: 44.7 µg/m³SepOct 2025: 15.1 µg/m³OctNov 2025: 15.1 µg/m³NovDec 2025: 13.8 µg/m³Dec

Faded bars: 2025. A month shows once it has 10 measured days.

This week against past years

This weekThis week: 57.1 µg/m³57.120252025: 18.7 µg/m³18.720242024: 10.0 µg/m³10.020232023: 20.7 µg/m³20.7

Mean PM2.5 for 24 Sept to 30 Sept in each year. Dashed line: WHO 24-hour guideline.

Monitors

StationOperatorType
NASA GSFC Rutgers Calib. N7CC0 1.0ClarityLow-cost
ShelfordCC BY 4.0AirGradientLow-cost
NUS S16CC BY 4.0AirGradientLow-cost
NUS S16CC BY 4.0AirGradientLow-cost
NUS ScienceCC BY 4.0AirGradientLow-cost
NUS ScienceCC BY 4.0AirGradientLow-cost
NUSCC BY 4.0AirGradientLow-cost
NUS ScienceCC BY 4.0AirGradientLow-cost
NUS ScienceCC BY 4.0AirGradientLow-cost
NUS ScienceCC BY 4.0AirGradientLow-cost
NUS ScienceCC BY 4.0AirGradientLow-cost
NUS ScienceCC BY 4.0AirGradientLow-cost
Alexandra CanalCC BY 4.0AirGradientLow-cost

No reference monitor here, so the value is the median of low-cost sensors (at least two reporting each hour). Low-cost sensors can read high in humid air. Data via OpenAQ; licences as listed. How we rank. Embed this on your site.

Other cities in Singapore

Singapore 48.8

30-day averages, µg/m³. All of Singapore →

Updated 2026-10-01 09:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.