City report · Johor, Malaysia
Muar Air quality today
Air quality in Muar currently reads AQI 27 (Good): Air quality is satisfactory for everyone.
AQI 27
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 4.9
- tree cover
- 27.0%
- trees in this area
- 75.3K
- more trees needed
- 8.4K
Measured across a 2 km radius around Pekan Muar, 84000 Muar, Johor Darul Ta'zim, Malaysia (12.57 km²), from a satellite image of Jun 13, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Muar · AQI 27 (Good)
Muar's tree count comes to 75,323 trees across 11.16 km² of land, 3 points below the 30% tree-cover level considered healthy for this area, so roughly 8,369 more trees would close the gap.
Air quality detail
Air quality in Muar today: AQI 27, Good
Main pollutant: PM2.5 · Observed Nov 11, 17:00 local time via Open-Meteo / CAMS, corrected with 23 ground-station cities within 185 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 23 station cities within 185 km, e.g. Malacca and Batu Pahat
Health signal
Air quality is satisfactory for everyone.
PM2.5
4.9
PM10
6.5
NO₂
5.2
O₃
161.0
SO₂
3.9
CO
157.0
- Outdoor exercise
- A good day to be active outside
- Windows
- Open them to air the house
- Mask
- Not needed
- Air purifier
- Not needed
Over the last 7 days, the CAMS air-quality model put Muar's daily AQI at 31 on average, from 20 on Nov 7 to an hourly peak of 62 on Nov 5.
This is the US EPA AQI. How it differs from Malaysia's API (IPU) · The full guide
Where Muar stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Muar: Below target
27.0% tree cover against a 30% healthy-neighborhood target, across 11.16 km² of land.
Trees in this area
75,323
Target trees
83,692
More trees needed
8,369
CO₂ if planted / yr
184.1 t
Deforestation · 2001–2025
How much forest has Muar lost?
Since 2001, the area within 10 km of Muar has lost about 4,960 hectares of forest (about 6,900 football pitches): 38% of the forest it had in 2000. Most of it (over 99%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2018: satellite photo from February 2018 of a 5 × 5 km area about 5 km southeast of the city center.
- Forest lost since 2001
- 4,960 haabout 6,900 football pitches
- Share of its forest
- 38%of what there was in 2000
- Cleared for good
- 4,960 hadeforestation: turned into farms, mines or towns
Forest loss is slowing down: about 138 hectares a year in 2021–2025, down from 229 hectares a year in 2016–2020. The worst year was 2007, when about 463 hectares of forest were lost.
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 58 ha | under 1 ha | 58 ha |
| 2002 | 107 ha | under 1 ha | 107 ha |
| 2003 | 71 ha | under 1 ha | 71 ha |
| 2004 | 218 ha | under 1 ha | 218 ha |
| 2005 | 253 ha | under 1 ha | 253 ha |
| 2006 | 161 ha | under 1 ha | 161 ha |
| 2007 | 463 ha | under 1 ha | 463 ha |
| 2008 | 235 ha | under 1 ha | 235 ha |
| 2009 | 374 ha | under 1 ha | 374 ha |
| 2010 | 49 ha | under 1 ha | 49 ha |
| 2011 | 357 ha | under 1 ha | 357 ha |
| 2012 | 248 ha | under 1 ha | 248 ha |
| 2013 | 50 ha | under 1 ha | 50 ha |
| 2014 | 312 ha | 1 ha | 313 ha |
| 2015 | 170 ha | under 1 ha | 170 ha |
| 2016 | 406 ha | under 1 ha | 406 ha |
| 2017 | 241 ha | under 1 ha | 241 ha |
| 2018 | 142 ha | under 1 ha | 142 ha |
| 2019 | 210 ha | under 1 ha | 210 ha |
| 2020 | 144 ha | under 1 ha | 144 ha |
| 2021 | 110 ha | under 1 ha | 110 ha |
| 2022 | 168 ha | under 1 ha | 168 ha |
| 2023 | 135 ha | under 1 ha | 135 ha |
| 2024 | 146 ha | under 1 ha | 146 ha |
| 2025 | 133 ha | under 1 ha | 133 ha |
What is causing deforestation around Muar?
- Farms, pasture and plantationscleared for good82% · 4,090 ha
- Towns and roadscleared for good18% · 875 ha
Also: storms, floods and other natural causes, unknown causes.
Causes for 2025 are estimates, based on what caused forest loss in the same places up to 2024.
Forest gained and lost, 2000–2020
- Forest in 2000
- 14,600 ha
- Forest in 2020
- 13,300 ha
- Overall change
- −1,350 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Muar shrank from about 14,600 hectares to 13,300 hectares, a net loss of about 1,350 hectares (−9.2%). New forest grew on about 684 hectares, but 2,030 hectares were lost.
These 2000 and 2020 maps, from the University of Maryland, count any land with trees taller than 5 m as forest, including plantations and orchards. Forest that was cut or burned and had grown back by 2020 counts in both years, so the loss here is smaller than the yearly figures.
These figures cover everything within 10 km of the city center, a wider area than the report above, because forest is usually lost at a city's edges.
Source: Hansen/UMD/Google/USGS/NASA, Global Forest Change (GFC-2025-v1.13); causes: WRI/Google DeepMind drivers of forest loss; both CC BY 4.0, summed by Airleaf for each area. Forest gained and lost 2000–2020: Potapov et al. 2022, UMD GLAD Global Land Cover and Land Use Change, CC BY 4.0. Images: contains modified Copernicus Sentinel data. How it's measured
In the same region
Measured cities near Muar
Same 2 km radius, same index — so they compare directly.
- Malacca40.2 km
Malaysia
- Tree cover
- 21%
- Air quality
- 65
- Batu Pahat45.6 km
Malaysia
- Tree cover
- 21%
- Air quality
- 46
- Kluang83.1 km
Malaysia
- Tree cover
- 30%
- Air quality
- 53
- Port Dickson101.1 km
Malaysia
- Tree cover
- 33%
- Air quality
- 65
- Seremban103.5 km
Malaysia
- Tree cover
- 39%
- Air quality
- 58
- Sepang116.1 km
Malaysia
- Tree cover
- 74%
- Air quality
- 64
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Frequently asked
Questions about Muar
What is the air quality (AQI) in Muar right now?
The latest reading for Muar shows an AQI of 27 (Good), observed Nov 11, 17:00 local time via Open-Meteo / CAMS, corrected with 23 ground-station cities within 185 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Muar today?
At AQI 27 (Good): a good day to be active outside. Windows: open them to air the house. Masks: not needed. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Muar been like this week?
Over the last 7 days, the CAMS air-quality model put Muar's daily AQI at 31 on average, from 20 on Nov 7 to an hourly peak of 62 on Nov 5. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
Is Muar's AQI the same as Malaysia's API (IPU)?
No. Airleaf shows the US EPA Air Quality Index (AQI), the scale used by IQAir and most air-quality apps. Malaysia's Department of Environment (Jabatan Alam Sekitar) publishes its own Air Pollutant Index, the API or Indeks Pencemar Udara (IPU), every hour for each of its monitoring stations on APIMS (apims.doe.gov.my). Both scales call 0–50 good and 51–100 moderate; above that the IPU runs 101–200 unhealthy, 201–300 very unhealthy and over 300 hazardous. The two use different breakpoints and averaging times, so the numbers for the same hour often differ. For the official IPU reading, check the nearest station on APIMS.
How much forest has the area around Muar lost since 2001?
Since 2001, the area within 10 km of Muar has lost about 4,960 hectares of forest (about 6,900 football pitches): 38% of the forest it had in 2000. Most of it (over 99%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Forest loss is slowing down: about 138 hectares a year in 2021–2025, down from 229 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Muar shrank from about 14,600 hectares to 13,300 hectares, a net loss of about 1,350 hectares (−9.2%). New forest grew on about 684 hectares, but 2,030 hectares were lost.
What is the tree count in Muar?
Muar has an estimated 75,323 trees across the 11.16 km² of land measured — 27.0% tree cover, 3 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Muar need?
Muar needs roughly 8,369 more trees to close a 3-point shortfall against its 30% tree-cover target — about 184.1 t of extra CO₂ absorbed per year once grown.
How are Muar's air quality and tree cover measured?
Air quality comes from ground monitoring stations via OpenAQ where one reports nearby, and otherwise, as here, from the Open-Meteo / CAMS model, which may differ from street-level monitors. Tree cover is measured from Sentinel-2 L2A (ESA Copernicus) via Earth Search satellite imagery at 10 m detail across a 2 km radius around Pekan Muar; the tree count is an estimate derived from that cover.
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