City report · Selangor, Malaysia
Selayang Baru Utara Air quality today
Air quality in Selayang Baru Utara currently reads AQI 113 (Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
AQI 113
Air quality right now
Unhealthy for sensitive groups
- PM2.5, fine particles (µg/m³)
- 40.4
- tree cover
- 29.1%
- trees in this area
- 91.1K
- more trees needed
- 18.5K
Measured across a 2 km radius around Selayang Baru, 68100 Batu Caves, Selangor, Malaysia (12.57 km²), from a satellite image of Aug 15, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Selayang Baru Utara · AQI 113 (Unhealthy for sensitive groups)
Selayang Baru Utara's tree count comes to 91,146 trees across 12.53 km² of land, 6 points below the 35% tree-cover level considered healthy for this area, so roughly 18,480 more trees would close the gap.
Air quality detail
Air quality in Selayang Baru Utara today: AQI 113, Unhealthy for sensitive groups
Main pollutant: PM2.5 · Observed Nov 11, 23:00 local time via World Air Quality Index Project ground stations, US EPA index. Values in µg/m³.
Ground station · Batu Muda,Kuala Lumpur, Wilayah Persekutuan, Malaysia, 5 km away
Health signal
Sensitive groups should limit long or intense outdoor activity.
PM2.5
40.4
PM10
47.5
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Malaysia Department of Environment (DOE); Air Polluant Index Management System
- Outdoor exercise
- Children, older adults and people with asthma or heart disease should cut down long or hard exercise
- Windows
- Close them to keep the outside air out
- Mask
- Sensitive groups: an N95 outdoors
- Air purifier
- Run one, especially in bedrooms
Over the last 7 days, the CAMS air-quality model put Selayang Baru Utara's daily AQI at 92 on average, from 83 on Nov 7 to an hourly peak of 165 on Nov 6.
This is the US EPA AQI. How it differs from Malaysia's API (IPU) · The full guide
Where Selayang Baru Utara stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Selayang Baru Utara: Below target
29.1% tree cover against a 35% healthy-neighborhood target, across 12.53 km² of land.
Trees in this area
91,146
Target trees
109,626
More trees needed
18,480
CO₂ if planted / yr
406.6 t
Deforestation · 2001–2025
How much forest has Selayang Baru Utara lost?
Since 2001, the area within 10 km of Selayang Baru Utara has lost about 2,370 hectares of forest (about 3,300 football pitches): 13% of the forest it had in 2000. Most of it (93%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from February 2017 of a 5 × 5 km area about 7 km east of the city center.
- Forest lost since 2001
- 2,370 haabout 3,300 football pitches
- Share of its forest
- 13%of what there was in 2000
- Cleared for good
- 2,200 hadeforestation: turned into farms, mines or towns
Forest loss has stayed about the same: about 94 hectares a year in 2021–2025, against 107 hectares a year in 2016–2020. The worst year was 2004, when about 175 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 | 72 ha | 3 ha | 74 ha |
| 2002 | 73 ha | 1 ha | 75 ha |
| 2003 | 55 ha | under 1 ha | 55 ha |
| 2004 | 172 ha | 3 ha | 175 ha |
| 2005 | 131 ha | 2 ha | 133 ha |
| 2006 | 84 ha | 2 ha | 86 ha |
| 2007 | 87 ha | 12 ha | 98 ha |
| 2008 | 64 ha | 7 ha | 71 ha |
| 2009 | 164 ha | 2 ha | 166 ha |
| 2010 | 89 ha | 2 ha | 92 ha |
| 2011 | 49 ha | 3 ha | 51 ha |
| 2012 | 47 ha | under 1 ha | 48 ha |
| 2013 | 5 ha | under 1 ha | 6 ha |
| 2014 | 123 ha | 14 ha | 137 ha |
| 2015 | 76 ha | 16 ha | 91 ha |
| 2016 | 144 ha | 18 ha | 162 ha |
| 2017 | 79 ha | 14 ha | 93 ha |
| 2018 | 104 ha | 10 ha | 114 ha |
| 2019 | 100 ha | 2 ha | 101 ha |
| 2020 | 65 ha | 1 ha | 66 ha |
| 2021 | 107 ha | 28 ha | 135 ha |
| 2022 | 38 ha | 12 ha | 50 ha |
| 2023 | 110 ha | 1 ha | 111 ha |
| 2024 | 99 ha | 7 ha | 106 ha |
| 2025 | 65 ha | 4 ha | 70 ha |
What is causing deforestation around Selayang Baru Utara?
- Towns and roadscleared for good57% · 1,340 ha
- Mining and energycleared for good22% · 509 ha
- Farms, pasture and plantationscleared for good15% · 346 ha
Also: logging, shifting farming, 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
- 20,800 ha
- Forest in 2020
- 20,500 ha
- Overall change
- −357 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Selayang Baru Utara stayed about the same size, at about 20,500 hectares: new forest grew on about 962 hectares, and about 1,320 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 Selayang Baru Utara
Same 2 km radius, same index — so they compare directly.
- Bukit Rahman Putra12.5 km
Malaysia
- Tree cover
- 38%
- Air quality
- 63
- Kampung Baru Subang18.9 km
Malaysia
- Tree cover
- 25%
- Air quality
- 66
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Frequently asked
Questions about Selayang Baru Utara
What is the air quality (AQI) in Selayang Baru Utara right now?
The latest reading for Selayang Baru Utara shows an AQI of 113 (Unhealthy for sensitive groups), measured Nov 11, 23:00 local time by the Batu Muda,Kuala Lumpur, Wilayah Persekutuan, Malaysia ground monitoring station, 5 km away, via OpenAQ. The main pollutant is PM2.5. Sensitive groups should limit long or intense outdoor activity.
Is it safe to exercise outside in Selayang Baru Utara today?
At AQI 113 (Unhealthy for sensitive groups): children, older adults and people with asthma or heart disease should cut down long or hard exercise. Windows: close them to keep the outside air out. Masks: sensitive groups: an N95 outdoors. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Selayang Baru Utara been like this week?
Over the last 7 days, the CAMS air-quality model put Selayang Baru Utara's daily AQI at 92 on average, from 83 on Nov 7 to an hourly peak of 165 on Nov 6. On 1 of those days the average was above 100, unhealthy for sensitive groups.
Is Selayang Baru Utara'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 Selayang Baru Utara lost since 2001?
Since 2001, the area within 10 km of Selayang Baru Utara has lost about 2,370 hectares of forest (about 3,300 football pitches): 13% of the forest it had in 2000. Most of it (93%) was deforestation, forest cleared for good, mainly for towns and roads. Forest loss has stayed about the same: about 94 hectares a year in 2021–2025, against 107 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Selayang Baru Utara stayed about the same size, at about 20,500 hectares: new forest grew on about 962 hectares, and about 1,320 hectares were lost.
What is the tree count in Selayang Baru Utara?
Selayang Baru Utara has an estimated 91,146 trees across the 12.53 km² of land measured — 29.1% tree cover, 6 percentage points short of the 35% tree-cover target set for this area.
How many more trees does Selayang Baru Utara need?
Selayang Baru Utara needs roughly 18,480 more trees to close a 6-point shortfall against its 35% tree-cover target — about 406.6 t of extra CO₂ absorbed per year once grown.
How are Selayang Baru Utara's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Selayang Baru, via OpenAQ; the 7-day trend is the Open-Meteo / CAMS model's estimate. 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 Selayang Baru; the tree count is an estimate derived from that cover.
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