30 Sep – 6 Oct 2026 · Singapore

Singapore weekly air quality

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

126Weekly mean AQI · Unhealthy for Sensitive Groups

Official PSI mean: 91.7. 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.

+16.9 AQI compared with the previous week’s eligible mean of 109.1.

Peak AQI: 176 at Central · 30 Sept 2026, 00:00 (UTC+8).

Daily US AQI (PM2.5)

Low 71High 176AQI

30 Sept6 Oct

6 OctDaily mean · Peak 174158.8Avg 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
2026-09-30	154.8Unhealthy	176	120 / 0
2026-10-01	96.8Moderate	142	120 / 0
2026-10-02	90.4Moderate	129	120 / 0
2026-10-03	122.3Unhealthy for Sensitive Groups	154	120 / 0
2026-10-04	117.4Unhealthy for Sensitive Groups	152	120 / 0
2026-10-05	141.3Unhealthy for Sensitive Groups	173	120 / 0
2026-10-06	158.8Unhealthy	174	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
2026-09-30	166	164.6	163.6	162	161.2	160.4	159	158.2	157.4	157	156.8	156.4	155.8	155.6	154.8	154.8	154	152.8	150.6	149	146.4	143.8	139.6	135.6
2026-10-01	131	125.8	120.8	116.2	110.8	107.2	104.4	101.4	98.4	95.4	92.2	90	88.8	87.2	85.8	84	82.4	83.6	84.4	85.6	86.4	87.2	87.6	87.6
2026-10-02	87.2	87.2	87.4	87.8	87.8	87.4	87.4	87.4	86.8	86.4	86	85.2	84.4	84.4	85.6	87.2	89.2	92	95	97.2	99.2	101.6	104.2	106
2026-10-03	108.2	109.6	110.8	112.2	114.2	115.4	116.8	117.8	120.4	121.8	124.2	127.2	129.4	130.6	131.4	130.6	130.2	129.2	128.2	127.4	126.4	125	124.2	123.8
2026-10-04	124.4	124.8	125	125	124.4	123.4	123	122.2	121.2	119.8	118.2	115.2	112.2	110.2	108.4	109	110	111.6	113.2	114.4	114.6	115.4	116	116.2
2026-10-05	117.8	121	124.8	128	130.4	132.8	135.2	135.6	136.6	137.2	137.8	139.8	140.6	142.6	143.8	146.2	147.8	149.6	151.2	153.8	157.2	159	160.2	161.2
2026-10-06	161.8	161	160.2	158.8	158	157.2	156.8	156.6	156.4	156.4	157.8	158.8	159.8	160	160.8	160.6	160.6	160.6	160.4	160	158.4	157.8	156.4	155.2

Observation categories

Good: 0

Moderate: 237

Unhealthy for Sensitive Groups: 335

Unhealthy: 268

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
Central	142.5Unhealthy for Sensitive Groups	176	103	168 / 0
East	129.6Unhealthy for Sensitive Groups	169	93.7	168 / 0
West	129.1Unhealthy for Sensitive Groups	174	94	168 / 0
South	118.6Unhealthy for Sensitive Groups	158	86.1	168 / 0
North	110Unhealthy for Sensitive Groups	158	81.5	168 / 0

Singapore air quality.
Weekly haze review.

30 Sep – 6 Oct 20267 days · 5 NEA Regions

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

During the week of 30 Sep – 6 Oct 2026, Singapore recorded an average PSI of 91.7 (Moderate) across reporting regions. Average 1-hour PM2.5 was 48.1 µg/m³.

National weekly average

91.7PSI

Moderate

8.1 PSI hazier than the week before, which averaged 83.6

Daily averages71.4 – 113.6 PSIWed → Tue

Explore the week

Overall weekly PSI: 91.7Moderate airAverage across reporting regions
1-hour PM2.5 average: 48.1µg/m³Fine particulate matter
Cleanest region: NorthAvg PSI: 81.5Lowest 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 · 0–150 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, 30 Sep	110	81	138
Thu, 1 Oct	74.5	59	96
Fri, 2 Oct	71.4	60	91
Sat, 3 Oct	87.4	71	105
Sun, 4 Oct	85	71	103
Mon, 5 Oct	99.9	77	134
Tue, 6 Oct	113.6	95	136

Singapore regions ranked by weekly average

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

North Region81.5 PSI
Moderate · PM2.5: 39.3 µg/m³Peak PSI: 111
South Region86.1 PSI
Moderate · PM2.5: 42.6 µg/m³Peak PSI: 112
East Region93.7 PSI
Moderate · PM2.5: 50 µg/m³Peak PSI: 128
West Region94 PSI
Moderate · PM2.5: 49.8 µg/m³Peak PSI: 135
Central Region103 PSI
Unhealthy · PM2.5: 59 µg/m³Peak PSI: 138

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 (66.6 – 123.4 API)

Haziest hour of the week: Wed at 00:00 MYT, averaging API 123.4 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	123.4	121.4	119.6	118	117	115.6	114	113	112.2	111.6	111.4	110.8	110	109.8	109.2	109.2	108.6	107	105	103	101	98.8	96	93.6
Thu	91	89	86.6	84.4	82.2	80.2	79	77.6	75.6	74.2	72.4	71	70.6	69.4	68.8	67.4	66.6	67.4	68	68.2	69	69.6	69.6	69.8
Fri	70	69.6	69.6	69.8	69.4	69.8	69.8	69.8	69.6	69.2	68.8	68.8	68.2	68.2	68.6	69.8	71	72.2	73.6	75	76.2	77.2	78.6	79.8
Sat	80.6	81.4	81.8	82.6	83.4	83.8	84.4	85.2	85.8	87	88.2	89.8	91	91.6	92	92	91.4	91	90.2	90	89.4	88.6	88.4	88.2
Sun	88.4	88.6	88.6	88.6	88.4	88.2	87.8	87.6	87.2	86.2	85.4	84	82.4	81.4	80.8	80.8	81.2	82.2	82.8	83.4	83.6	84	84.4	84.4
Mon	85.2	86.8	89	90.6	91.8	93.2	94.6	95.4	96	96.8	97.2	98.2	99	100.4	101.4	102.8	104.4	105.4	106.4	108.6	110.8	113.2	115	116.4
Tue	117.2	116	115.2	114	113.2	112.8	112.2	111.8	111.6	111.6	111.8	113	114	114.8	115.6	115.4	115.2	115.4	115.4	114.4	112.4	111.8	111	109.8