21 – 27 Oct 2026 · Singapore

Singapore weekly air quality

US AQI · PM2.5 · 24-hour source averages

123.6Weekly mean AQI · Unhealthy for Sensitive Groups

Official PSI mean: 91.5. Calculated separately from reported official observations.

Each NEA 24-hour PM2.5 concentration is converted using US AQI breakpoints. This is not an official all-pollutant AQI or NowCast. Calculation details

840 eligible observations · 0 excluded.

-60.4 AQI compared with the previous week’s eligible mean of 184.

Peak AQI: 186 at West · 24 Oct 2026, 13:00 (UTC+8).

Daily US AQI (PM2.5)

Low 73High 186AQI

21 Oct27 Oct

27 OctDaily mean · Peak 9780.3Avg AQI

Based on 120 hourly readings.

Daily and hourly means use eligible observations across the selected locations. Each observation uses a 24-hour PM2.5 average.

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Means and peaks use only converted observations. Missing days remain gaps.

Day	Mean AQI	Peak AQI	Eligible / excluded
2026-10-21	141.6Unhealthy for Sensitive Groups	177	120 / 0
2026-10-22	117.1Unhealthy for Sensitive Groups	165	120 / 0
2026-10-23	114.2Unhealthy for Sensitive Groups	160	120 / 0
2026-10-24	165.5Unhealthy	186	120 / 0
2026-10-25	152.9Unhealthy	184	120 / 0
2026-10-26	93.8Moderate	142	120 / 0
2026-10-27	80.3Moderate	97	120 / 0

Hourly means (UTC+8)

Day	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
2026-10-21	151.2	150.6	149.2	148	146.6	145.6	144.4	144.2	143.2	143.2	142.6	142	141.2	140.2	138.6	136.8	136	136.6	136.8	136.6	136.6	136.4	136.2	135.6
2026-10-22	133.8	133.2	132	131.2	129.6	128.2	126.8	125.8	123.6	122.4	119.4	118.2	115.6	115	113.6	111.4	109.2	108	105.8	104	102.2	101.6	99.4	99.8
2026-10-23	98.8	98.4	98.4	98.6	98.6	98.2	98	98	98	98	98.8	100.6	103.6	107.2	113.6	119.4	126.2	131.4	135.8	137.8	141.4	144.4	147.6	150.2
2026-10-24	154.4	156.4	158.8	160	162	163.4	164.6	166.2	168	169.2	170.6	171	171	171	170	169.2	167.8	166.6	165.8	165.4	165.6	165.2	165.2	164.6
2026-10-25	164.2	163.4	163.2	163	162.6	162.4	161.8	161.2	160.6	159.2	157.6	156.2	154.2	153.6	151.6	150.2	149.8	147.4	145	142.8	139.8	137	133.6	130.2
2026-10-26	126	119.4	114	109	104.2	99.4	95.4	92.4	91.2	90	88.4	88	88.4	87.2	85.8	86.4	86.8	86.8	87.6	87	86.2	85.4	83.4	82.2
2026-10-27	81.4	81	81.4	81.4	80.2	80.2	79.6	79.6	78.8	78.4	78.4	78.4	78.4	79.6	79.6	80.8	81.4	81.8	80.6	80.8	80.8	81.6	81.6	82.4

Observation categories

Good: 0

Moderate: 300

Unhealthy for Sensitive Groups: 257

Unhealthy: 283

Very Unhealthy: 0

Hazardous: 0

US AQI scale
AQI	Category
0–50	Good
51–100	Moderate
101–150	Unhealthy for Sensitive Groups
151–200	Unhealthy
201–300	Very Unhealthy
301+	Hazardous

Regions by US AQI

Sorted by eligible mean AQI. Counts show the available coverage.

Location	Mean AQI	Peak AQI	Official PSI mean	Eligible / excluded
West	142.5Unhealthy for Sensitive Groups	186	107.2	168 / 0
Central	130.2Unhealthy for Sensitive Groups	177	95.6	168 / 0
East	119.9Unhealthy for Sensitive Groups	165	87.7	168 / 0
South	114.7Unhealthy for Sensitive Groups	163	84.2	168 / 0
North	110.9Unhealthy for Sensitive Groups	168	83.1	168 / 0

Singapore air quality.
Weekly haze review.

21 – 27 Oct 20267 days · 5 NEA Regions

Weekly Pollutant Standards Index (PSI) and PM2.5 air quality report for Singapore

During the week of 21 – 27 Oct 2026, Singapore recorded an average PSI of 91.5 (Moderate) across reporting regions. Average 1-hour PM2.5 was 45.8 µg/m³.

National weekly average

91.5PSI

Moderate

58.1 PSI cleaner than the week before, which averaged 149.6

Daily averages65.4 – 122.7 PSIWed → Tue

Explore the week

Overall weekly PSI: 91.5Moderate airAverage across reporting regions
1-hour PM2.5 average: 45.8µg/m³Fine particulate matter
Cleanest region: NorthAvg PSI: 83.1Lowest weekly regional average
Regions reporting: 5 of 5Central, North, South, East, WestNEA air quality network

Seven days of Singapore air quality

Daily movement of 24-hour PSI and regional variance

Archived API · Malaysia TimePoint, tap or use ← → to inspect

National averageStation peakMin–max rangeAPI bands7 of 7 points · 0–175 API

The average follows all available readings each day. The range spans the lowest and highest station readings; a national average can hide local peaks.

View chart data as a table

Archived national API, daily
Date / time	Average	Minimum	Peak
Wed, 21 Oct	102.1	79	140
Thu, 22 Oct	85.6	70	122
Fri, 23 Oct	83.8	66	116
Sat, 24 Oct	122.7	98	154
Sun, 25 Oct	108.1	86	150
Mon, 26 Oct	73.1	62	96
Tue, 27 Oct	65.4	61	76

Singapore regions ranked by weekly average

Air quality across Central, North, South, East and West Singapore

North Region83.1 PSI
Moderate · PM2.5: 39.9 µg/m³Peak PSI: 126
South Region84.2 PSI
Moderate · PM2.5: 39.5 µg/m³Peak PSI: 118
East Region87.7 PSI
Moderate · PM2.5: 42.5 µg/m³Peak PSI: 122
Central Region95.6 PSI
Moderate · PM2.5: 48.6 µg/m³Peak PSI: 140
West Region107.2 PSI
Unhealthy · PM2.5: 58.5 µg/m³Peak PSI: 154

The week, hour by hour

Hourly Singapore air quality trend across seven days

Hourly levels reflect regional atmospheric dispersion and transboundary wind patterns recorded across the island.

050100150APIBrighter cells ran hazier than the rest of this week (64.2 – 131 API)

Haziest hour of the week: Sat at 12:00 MYT, averaging API 131 nationwide.

View the hourly figures as a table

National average API by hour, Malaysia Time
Day	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Wed	109.8	108.8	107.6	106.6	105.6	105	104.2	103.8	103.6	103.4	103.2	102.8	102.2	101	100	98.6	98	98	98.2	98	98.2	98	97.8	97.2
Thu	96.2	95.6	94.6	94.2	92.8	91.8	91	90	88.8	88	86.8	85.6	84.8	84	83.2	82	80.8	80	79	78.2	77.6	76.8	76.2	76
Fri	75.8	75.8	75.8	76	75.8	75.4	75	75	75.2	75.2	75.4	76.4	77.8	80	82.8	86.2	89.2	92.4	94.6	96.6	98.2	100.2	102.2	104.6
Sat	107.2	110	112.6	115	117.4	119.6	121.6	124.4	126	128	129.6	130.6	131	130.4	129.4	127.8	126	124.2	123.4	123	122.6	122.4	122	121.2
Sun	120.8	119.8	119.2	118.8	118.6	118.2	117.4	116.4	114.8	113.2	111.4	108.8	107.4	106	105	103.8	102.6	101	99.4	97.6	96.2	94.4	92.6	90.6
Mon	88.8	85.8	83.6	81	78.6	76.2	74.6	73	71.8	71.2	70.4	70.4	70.2	69.6	69.2	69.4	69.2	69.6	70	69.6	69	68.2	67.4	66.4
Tue	66	66	66.2	65.8	65.6	65.2	65	64.8	64.6	64.4	64.2	64.2	64.4	64.6	65	65.4	66	66.2	66	65.8	65.8	65.6	66.4	67