SemakAPI
Updated MYThourly readingNegeri Sembilan
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172API
Station Nilai, NEGERI SEMBILAN · 14:00 MYT

Nilai API today

UnhealthyPM2.5 ≈ 96.2 µg/m³ · 24-hour average≈ US AQI 180 (Unhealthy) · estimate, for comparison with international apps

Reduce outdoor activity. Sensitive groups should avoid it. Keep windows closed and wear an N95 if you must go out.

Last 24 hours170 – 181

Official Department of Environment readings, updated hourly. Each city is represented by a single monitoring station. For all 68 stations, see the official APIMS.

Official APIMS readings

3-day forecastForecast

Modelled estimate, not an official reading.

  1. Today
    156API
    Unhealthy

    PM2.5 ≈ 65.1 µg/m³

  2. Tomorrow
    126API
    Unhealthy

    PM2.5 ≈ 53 µg/m³

  3. 20 Oct
    90API
    Moderate

    PM2.5 ≈ 42.2 µg/m³

This forecast comes from the Open-Meteo (CAMS) model, not from Department of Environment readings. It shows the expected direction of travel, not an official value. For health decisions, use the current reading above.

Forecast and weather by Open-Meteo.com · CC BY 4.0 · Modified: modelled concentrations are converted to the Malaysian Air Pollutant Index.How accurate is the forecast?

Daily history

The highest reading each day over the last 30 days.

18 Oct176HighAverage 173 · Low 170
19 Sep0 – 20018 Oct

Haze alerts

Get a notification when the air turns unhealthy. No sign-up, and you can turn it off at any time.

Stations in Negeri Sembilan

All stations

Other cities

Tap a city for health advice

Batu Pahat
1
6
8
2
UnhealthyBatu Pahat, JOHOR
Seremban
1
6
7
10
UnhealthySeremban, NEGERI SEMBILAN
Shah Alam
1
5
7
14
UnhealthyShah Alam, SELANGOR
Melaka
1
5
6
8
UnhealthyBandaraya Melaka, MELAKA
Putrajaya
1
5
6
9
UnhealthyPutrajaya, W.P. PUTRAJAYA
Klang
1
5
5
15
UnhealthyKlang, SELANGOR
Kuala Lumpur
1
5
4
10
UnhealthyCheras, W.P. KUALA LUMPUR

Common questions: Nilai API

What is the API in Nilai right now?
The API in Nilai is 172 (Unhealthy) as of 14:00 MYT, 18 Oct, read at the Department of Environment's Nilai, NEGERI SEMBILAN station. Reduce outdoor activity. Sensitive groups should avoid it. Keep windows closed and wear an N95 if you must go out.
Which station represents Nilai?
Nilai's reading here comes from the Department of Environment's Nilai, NEGERI SEMBILAN station (CA23N), about 1 km from the city centre. One station does not represent a whole city, so other parts of it can read differently.
What will the haze be like in Nilai tomorrow?
The Open-Meteo (CAMS) model puts tomorrow's API at around 126 (Unhealthy). That is a modelled forecast, not an official Department of Environment reading.
What has the highest reading in Nilai been lately?
Over the last 30 days, the highest reading was 191 on 15 Oct. The daily average across that period was around 139.
Are schools in Nilai closed because of haze?
Since October 2026, schools in an affected area close when the API goes above 180, or stays above 150 for three days in a row, on the instruction of the Ministry of Education or the State Education Department, not from this number alone. The current reading of 172 is above 150. If it stays there for three days in a row, schools close.
When is haze season in Nilai?
The Peninsula's west coast has two risky windows: February to April, when haze is more local, and July to October, the worst window, when the southwest monsoon carries smoke from regional forest and peatland fires. El Niño years are usually worse.

The API scale

0 to 500. Higher is worse.

  • Good0–50
  • Moderate51–100
  • Unhealthy101–200
  • Very Unhealthy201–300
  • Hazardous301–500
  • Emergency500+