30 Sep – 6 Oct 2026 · Malaysia

Nilai weekly air quality

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

139.1Weekly mean AQI · Unhealthy for Sensitive Groups

Official DOE API mean: 126.9. Calculated separately from reported official observations.

Each DOE observation identified as PM2.5 is converted using the published API formula and US AQI breakpoints. This is not an official all-pollutant AQI or NowCast. Calculation details

158 eligible observations · 0 excluded.

+28.3 AQI compared with the previous week’s eligible mean of 110.8.

Peak AQI: 182 at Nilai · 30 Sept 2026, 00:00 (UTC+8).

Daily US AQI (PM2.5)

Low 91High 182AQI

30 Sept6 Oct

6 OctDaily mean · Peak 173163.4Avg AQI

Based on 14 hourly readings.

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

Export AQI CSV

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

Day	Mean AQI	Peak AQI	Eligible / excluded
2026-09-30	171.3Unhealthy	182	24 / 0
2026-10-01	150.7Unhealthy	156	24 / 0
2026-10-02	112.8Unhealthy for Sensitive Groups	143	24 / 0
2026-10-03	98.5Moderate	113	24 / 0
2026-10-04	138Unhealthy for Sensitive Groups	151	24 / 0
2026-10-05	148.9Unhealthy for Sensitive Groups	156	24 / 0
2026-10-06	163.4Unhealthy	173	14 / 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	182	182	182	181	181	179	179	178	177	177	177	174	171	169	166	165	165	165	163	162	160	159	158	158
2026-10-01	156	155	154	154	154	154	154	154	154	152	152	154	154	152	152	151	148	145	144	144	145	145	145	145
2026-10-02	143	143	141	139	136	130	126	124	118	117	113	109	105	103	101	99	99	97	97	96	96	94	91	91
2026-10-03	91	93	94	94	94	96	96	97	99	97	94	94	94	94	96	97	99	101	101	103	107	109	111	113
2026-10-04	115	115	117	118	122	124	128	132	132	136	140	146	148	150	150	151	151	149	148	148	147	147	149	150
2026-10-05	149	148	149	148	148	146	144	144	144	145	144	143	143	145	148	149	152	154	154	155	155	155	156	156
2026-10-06	158	158	159	159	159	160	162	163	165	166	167	169	170	173	—	—	—	—	—	—	—	—	—	—

Observation categories

Good: 0

Moderate: 26

Unhealthy for Sensitive Groups: 68

Unhealthy: 64

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

Nilai air quality.
Weekly station review.

30 Sep – 6 Oct 20267 days · Negeri Sembilan

Laporan mingguan Indeks Pencemaran Udara (IPU) bagi stesen Nilai, Negeri Sembilan

During the week of 30 Sep – 6 Oct 2026, air quality at Nilai averaged an Air Pollutant Index (API) of 126.9 (Unhealthy). Readings peaked at 174.

Station weekly average

126.9API

Unhealthy · Tidak Sihat

Daily averages79.5 – 165.9 APIWed → Tue

Explore the week

Week's peak reading: 174UnhealthyPeak during 7-day window
Rank in Negeri Sembilan: #3of 3 stationsState avg: 108.3 API
Good to Moderate air: 34%of hourly readings158 readings recorded
National standing: #66of 68 stationsNational avg: 82.4 API

Seven days of station air quality

Pergerakan purata harian dan julat bacaan sepanjang minggu

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

National averageStation peakMin–max rangeAPI bands7 of 7 points · 0–200 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	165.9	156	174
Thu, 1 Oct	145.3	125	155
Fri, 2 Oct	89.3	75	123
Sat, 3 Oct	79.5	75	87
Sun, 4 Oct	121.5	88	151
Mon, 5 Oct	140.6	122	155
Tue, 6 Oct	160.1	156	167

The week, hour by hour

Bacaan setiap jam dari tengah malam hingga 11 malam

Read each row from midnight to 11pm, in Malaysia Time. Hourly air quality at Nilai shows local patterns like traffic peaks and afternoon haze accumulation.

050100150200APIBrighter cells ran hazier than the rest of this week (75 – 174 API)

Haziest hour of the week: Wed at 00:00 MYT, averaging API 174 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	174	174	174	173	173	172	172	171	170	170	170	168	166	164	162	161	161	161	160	159	158	157	156	156
Thu	155	154	153	153	153	153	153	153	153	152	152	153	153	152	152	151	140	130	125	126	129	131	131	129
Fri	123	120	115	105	99	96	94	93	90	89	87	85	83	82	81	80	80	79	79	78	78	77	75	75
Sat	75	76	77	77	77	78	78	79	80	79	77	77	77	77	78	79	80	81	81	82	84	85	86	87
Sun	88	88	89	90	92	93	95	97	97	99	111	133	143	149	149	151	151	146	142	141	139	139	145	148
Mon	145	143	147	142	140	134	127	124	127	129	124	122	122	131	141	147	152	153	153	154	154	154	155	155
Tue	156	156	157	157	157	158	159	160	161	162	163	164	165	167	—	—	—	—	—	—	—	—	—	—

How the readings split

Pecahan bacaan mengikut kategori IPU

GoodBaik0%0
ModerateSederhana34%54
UnhealthyTidak Sihat66%104
Very UnhealthySangat Tidak Sihat0%0
HazardousBerbahaya0%0

Based on 158 hourly station readings.

What it meant for this area

Panduan kesihatan mengikut kategori kualiti udara

Limit prolonged outdoor activity. Children, older adults, pregnant women and people with respiratory or heart conditions should stay indoors where possible. A well-fitted N95 mask helps outdoors.

Hadkan aktiviti luar yang berpanjangan. Kanak-kanak, warga emas, ibu mengandung dan pesakit pernafasan atau jantung dinasihatkan berada di dalam bangunan. Pelitup muka N95 membantu di luar.

Malaysia API scale · Skala IPU Malaysia
API	Category	Kategori
0–50	Good	Baik
51–100	Moderate	Sederhana
101–200	Unhealthy	Tidak Sihat
201–300	Very Unhealthy	Sangat Tidak Sihat
301+	Hazardous	Berbahaya

Nearby monitoring stations around Nilai

Perbandingan purata mingguan dengan stesen berhampiran

Putrajaya118 API
Unhealthy17 away
Seremban110.3 API
Unhealthy21 away
Banting92.3 API
Moderate21 away
Cheras122 API
Unhealthy33 away

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	174	174	174	173	173	172	172	171	170	170	170	168	166	164	162	161	161	161	160	159	158	157	156	156
Thu	155	154	153	153	153	153	153	153	153	152	152	153	153	152	152	151	140	130	125	126	129	131	131	129
Fri	123	120	115	105	99	96	94	93	90	89	87	85	83	82	81	80	80	79	79	78	78	77	75	75
Sat	75	76	77	77	77	78	78	79	80	79	77	77	77	77	78	79	80	81	81	82	84	85	86	87
Sun	88	88	89	90	92	93	95	97	97	99	111	133	143	149	149	151	151	146	142	141	139	139	145	148
Mon	145	143	147	142	140	134	127	124	127	129	124	122	122	131	141	147	152	153	153	154	154	154	155	155
Tue	156	156	157	157	157	158	159	160	161	162	163	164	165	167	—	—	—	—	—	—	—	—	—	—

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	174	174	174	173	173	172	172	171	170	170	170	168	166	164	162	161	161	161	160	159	158	157	156	156
Thu	155	154	153	153	153	153	153	153	153	152	152	153	153	152	152	151	140	130	125	126	129	131	131	129
Fri	123	120	115	105	99	96	94	93	90	89	87	85	83	82	81	80	80	79	79	78	78	77	75	75
Sat	75	76	77	77	77	78	78	79	80	79	77	77	77	77	78	79	80	81	81	82	84	85	86	87
Sun	88	88	89	90	92	93	95	97	97	99	111	133	143	149	149	151	151	146	142	141	139	139	145	148
Mon	145	143	147	142	140	134	127	124	127	129	124	122	122	131	141	147	152	153	153	154	154	154	155	155
Tue	156	156	157	157	157	158	159	160	161	162	163	164	165	167	—	—	—	—	—	—	—	—	—	—