Johor Haze 2026: Wearing an N95 Properly, Keeping Your Room Livable and Preparing for El Nino Heat

As of 30 September 2026. Over the weekend of 26-28 September, Johor overtook Sarawak as the state with the worst air quality in Malaysia. If you work shifts, ride a motorcycle to the factory and sleep in a shared room, the haze affects you every day. This guide covers how to read the readings, how to wear an N95 mask so it actually protects you, how to keep your room more comfortable, and what the weather forecasters expect after the haze.

What happened this week

On the morning of 27 September (9 am), Malay Mail reported unhealthy readings in Kota Tinggi (165), Pasir Gudang (163), Pengerang (162) and Larkin (156). Six areas in the country were unhealthy, 52 were moderate and 9 were good.

On the evening of 28 September, The Star reported that readings had improved but were still unhealthy: Pasir Gudang 157, Kota Tinggi 155, Pengerang 154 and Larkin Lama 130. The cause is smoke from fires in parts of Sumatra and Kalimantan, and Singapore's environment agency expects dry conditions to persist there.

Haze in Kuala Lumpur, 18 September 2026 (AQI about 200). Photo: Renek78, CC0, via Wikimedia Commons

We do not have API readings for Senai or Kulai in these reports, so do not assume your area is better or worse than Pasir Gudang. Check the official API (the Air Pollutant Index Management System, APIMS) for the station nearest to you.

Reading the API

The bands quoted by Malay Mail are:

| API | Category | |---|---| | 0-50 | Good | | 51-100 | Moderate | | 101-200 | Unhealthy | | 201-300 | Very unhealthy | | 301 and above | Hazardous |

Every Johor reading above was in the unhealthy band (101-200). For a factory worker who is indoors all day, the commute is often the longest time outside.

Wearing an N95 properly

A mask you cannot breathe through or that leaks is worth little. The Star's mask guide (27 Sep 2026) says:

• An N95 is designed to filter at least 95% of test particles, including fine PM2.5.
• It must sit snugly across the nose, cheeks and chin with no gaps. Facial hair or anything else under the seal can let air leak.
• KN95 masks with ear loops may not seal as reliably as the two headbands on a typical N95.
• Replace it when it is wet, dirty, damaged, misshapen, hard to breathe through or no longer seals.
• Never wash, heat or disinfect a disposable N95 or KN95. That can damage it and reduce filtration.

An N95 respirator. Photo: Hanabishi, CC0, via Wikimedia Commons

Who should not simply rely on an N95. According to the same article, Ministry of Health guidance says N95 respirators are unsuitable for pregnant women, who should stay indoors with cleaner air and talk to a doctor. They are also unsuitable for children, because adult-size respirators may not seal on a child's face. People with asthma, COPD or heart or lung conditions should reduce time outdoors, keep taking their prescribed medicine and seek urgent care if symptoms get worse.

Keeping a shared room livable

These are general household tips, not medical advice.

• Check your windows. If a window will not close, tell your landlord. A louvre window that does not shut lets smoke in.
• Keep the room clean. Wipe surfaces and sweep or mop more often than usual.
• Dry laundry under a roof. A covered drying area works better than an open yard on a hazy day.
• Keep a spare mask. Store it somewhere clean and dry so it is ready when the readings go up.
• Talk to housemates on other shifts. Someone who sleeps by day needs the door closed and the fan low.

Check that room windows close properly. Photo: Bilik Sewa Senai

A covered laundry area helps on hazy days. Photo: Bilik Sewa Senai

A room that is easy to wipe down is easier to keep clean. Photo: Bilik Sewa Senai

After the haze: El Nino heat in 2027

The weather looks set to swing from haze to heat. MetMalaysia said in July that Johor and Melaka may get 20% to 40% less rain than usual in the coming Northeast Monsoon (late October or early November to late March). Temperatures could exceed 35 degrees Celsius from February to May, with the peak El Nino effect expected around March to May 2027, and the national record of 40.1 degrees Celsius (9 April 1998) could be surpassed. MetMalaysia also recommends conserving water.

So this is a forecast, not a guarantee. Sensible preparation for a shared house:

1. Plan for heat. Hotter weather means more fan use. Read our post on the 800 kWh TNB protection and how to split the bill fairly, because the protection ends on 31 December 2026.
2. Save water. Report dripping taps and running toilets to your landlord early.
3. Talk about heat at work. Ask your employer about breaks and drinking water during hot spells.

Common mistakes

• Wearing the mask under the nose or chin, or with gaps at the sides, so air leaks around the edges.
• Washing or heating a disposable respirator to reuse it, which the guidance warns against.
• Reusing a mask that is wet, dirty or hard to breathe through.
• Judging your air by another town's reading instead of checking the station nearest to you.
• Treating a forecast as a fact: the El Nino figures are MetMalaysia's outlook, so keep checking official updates.

FAQ

Is Senai's air quality the same as Pasir Gudang's? We do not know. The reports we used do not give Senai or Kulai readings. Check APIMS for the station nearest you.

Which mask should I buy? A properly fitted N95 filters at least 95% of test particles, per The Star. A KN95 with ear loops may seal less well.

Can I wash my mask? No. Do not wash, heat or disinfect disposable N95 or KN95 masks. Replace when wet, dirty or hard to breathe through.

Is an N95 safe for my child? Ministry of Health guidance quoted by The Star says N95 respirators are unsuitable for children. Ask a doctor.

Will it be flooding this monsoon? MetMalaysia expects 20% to 40% less rain than usual in Johor because of El Nino. That is a forecast, so keep checking official updates.

Sumber / Sources

• Malay Mail, Haze watch: Johor overtakes Sarawak (27 Sep 2026)
• The Star, Johor remains a haze hotspot as API readings improve (28 Sep 2026)
• The Star, Wear that face mask right to protect against the haze (27 Sep 2026)
• Malay Mail, El Nino: Johor, Melaka could see 20-40pc less rain (28 Jul 2026)
• Photos: Renek78, CC0, Wikimedia Commons; Hanabishi, CC0, Wikimedia Commons

Looking for a room in Senai? See the rooms at House 151, Taman Senai Baru, check rent, deposit & house rules, or go straight to today's vacant rooms.