Air quality comparison · Malaysia, 24 km apart
Ijok vs Kampung Baru Subang Air quality index (AQI) today
Kampung Baru Subang has cleaner air than Ijok right now: AQI 33 (Good) against 34 (Good).
Both sit in the same EPA band, so the health advice is the same for each today. Over the past 6 days, on modeled daily averages, Kampung Baru Subang averaged AQI 87 against 88, and it was the cleaner of the two on 1 of those days. Ijok has lost more forest since 2001. Ijok has more tree cover.
Malaysia
AQI 34
Good
Cleaner right now
- PM2.5
- 6.2 µg/m³
- Main pollutant
- PM2.5
- Source
- Ground station
- Reading
- Nov 11, 19:00 local
Malaysia
AQI 33
Good
Cleaner right now
- PM2.5
- 6 µg/m³
- Main pollutant
- PM2.5
- Source
- Ground station
- Reading
- Nov 11, 19:00 local
Updated . Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf.
Ijok34Kampung Baru Subang33
Head to head
Ijok vs Kampung Baru Subang at a glance
Kampung Baru Subang is ahead on 4 of 6 measures, and Ijok on 2. The better figure in each row is marked.
| Ijok | Kampung Baru Subang | |
|---|---|---|
| Air quality nowUS AQI. Lower is better. | 34 | 33 (better) |
| PM2.5Fine particles, µg/m³. | 6.2 | 6 (better) |
| Past week's averageUS AQI, 6 days. | 88 | 87 (better) |
| Forest lost since 2001Within 10 km of the center. | 16,000 ha | 6,890 ha (better) |
| Tree coverWithin 2 km of the center. | 81.0% (better) | 25.3% |
| Trees still neededTo reach a healthy canopy. | 0 (better) | 14.8K |
Air quality today
What is the air like in Ijok and Kampung Baru Subang right now?
Kampung Baru Subang has cleaner air than Ijok right now: AQI 33 (Good) against 34 (Good). PM2.5 is setting the index in both.
Both readings come from nearby ground stations.
IjokKampung Baru Subang
Concentrations at the same moment as the index above, for the pollutants both places report. Lower is better. The dark marks on the PM2.5 and PM10 rows show the WHO's 24-hour guidelines (15 and 45 µg/m³).
Ijok: Ground station · Kuala Selangor, Selangor, Malaysia, 16 km away. Data: World Air Quality Index Project, Malaysia Department of Environment (DOE); Air Polluant Index Management System.
Kampung Baru Subang: Ground station · Shah Alam, Selangor, Malaysia, 5.6 km away · median of 2 stations. Data: World Air Quality Index Project, Malaysia Department of Environment (DOE); Air Polluant Index Management System.
The past week
Which had cleaner air over the past 6 days?
Over the past 6 days, on modeled daily averages, Kampung Baru Subang averaged AQI 87 against 88, and it was the cleaner of the two on 1 of those days. A single reading can catch a city on a bad afternoon; the week says whether it was the weather or the place.
- Cleaner days
- Ijok0Kampung Baru Subang1
- Average AQI
- Ijok88Kampung Baru Subang87
- Worst day, AQI
- Ijok93Kampung Baru Subang92
The daily numbers (6 days)
| Day | Ijok | Kampung Baru Subang |
|---|---|---|
| Nov 5 | 92 | 92 |
| Nov 6 | 90 | 90 |
| Nov 7 | 83 | 83 |
| Nov 8 | 87 | 87 |
| Nov 9 | 83 | 83 |
| Nov 10 | 93 | 85 |
Daily averages from the CAMS atmospheric model for both places, so the week compares like with like. They can differ from today's reading at the top of the page wherever that comes from a ground station.
What it means today
Is it safe to go outside in Ijok and Kampung Baru Subang today?
Air quality is satisfactory for everyone. Both are in the same EPA band today (Good), so the advice is the same.
Exercise outdoors
A good day to be active outside.
Windows
Open them to air the house.
Masks
Not needed.
Air purifier
Not needed.
Against everywhere else
How do Ijok and Kampung Baru Subang compare with the rest of the world?
Right now Ijok's air is cleaner than 76% of the 5,420 places Airleaf tracks, and Kampung Baru Subang's is cleaner than 77%. Within Malaysia, that is 75% and 76% of its 56 measured places.
Cleaner air than…
- Ijok
- Beats 76%
- Kampung Baru Subang
- Beats 77%
More tree cover than…
- Ijok
- Beats 100%
- Kampung Baru Subang
- Beats 58%
Includes model estimates as well as station readings, so it can differ from our most polluted and cleanest air rankings, which use station readings only.
Deforestation · 2001–2025
Which has lost more forest, Ijok or Kampung Baru Subang?
Ijok has lost more: about 16,000 ha of forest within 10 km of its center from 2001 to 2025, against 6,890 ha around Kampung Baru Subang. 15,900 ha of that was cleared for good, for farms, mines or towns.
Measured within 10 km of each center, from the yearly satellite maps of forest loss: a wider circle than the one for tree cover, because forest is usually lost at a city's edges.
Worst year: 2019, with 1,440 ha lost.
Worst year: 2004, with 800 ha lost.
| Ijok | Kampung Baru Subang | |
|---|---|---|
| Forest lost since 2001Cleared, burned or logged. | 16,000 ha | 6,890 ha (better) |
| Share of its forestOf what it had in 2000. | 64% | 52% (better) |
| Cleared for goodTurned into farms, mines or towns. | 15,900 ha | 6,880 ha (better) |
| Recent trend2021–2025 against the five years before. | Slowing down | Slowing down |
| Main known cause | Farms, pasture and plantations (85%) | Towns and roads (82%) |
Satellite timelapses
Watch both change, year by year
A clear satellite photo a year of the land around each city. Press play, turn on the forest cleared since the first year, or drag the before and after.
Ijok
2017: satellite photo from March 2017 of a 5 × 5 km area about 6 km southeast of the city center.
Kampung Baru Subang
2017: satellite photo from February 2017 of a 5 × 5 km area about 7 km northwest of the city center.
Trees
Which has more trees, Ijok or Kampung Baru Subang?
Ijok has more tree cover: 81.0% of the land within 2 km of its center against 25.3% around Kampung Baru Subang, or about 254,469 trees against 79,403.
The dark mark is each place's canopy target: 30% of the land, raised where air quality is poor.
| Ijok | Kampung Baru Subang | |
|---|---|---|
| Trees standingEstimated from the canopy area. | 254K (better) | 79.4K |
| Trees still neededTo reach the target. Fewer is better. | 0 (better) | 14.8K |
| CO₂ absorbed each yearBy the trees already standing. | 5.6M kg (better) | 1.7M kg |
Tree cover on the satellite image
The same 2 km radius around each center, with the tree cover the satellite found marked on it.
Reading these numbers
How this comparison is made
Air quality index
The US EPA index, computed from current pollutant concentrations: ground stations where a place has them nearby, and the CAMS atmospheric model everywhere else. It moves hour to hour, so it is a snapshot rather than a verdict on either place. The guideline marks are from the WHO's 2021 air quality guidelines.
Trees and forest
Tree cover is the share of ground under canopy within 2 km of each center, read from Sentinel-2 satellite imagery at 10 m detail. It measures that circle, not the whole municipality, which is what makes the two comparable. Forest loss comes from the University of Maryland's Global Forest Change maps.
More on the method on the About Airleaf page.
Frequently asked
Ijok vs Kampung Baru Subang: your questions answered
Is Kampung Baru Subang cleaner than Ijok?
On air quality, yes, right now: Kampung Baru Subang reads AQI 33 against 34, a gap of 1 points on the US EPA index. This is a live reading rather than an annual average, so it can reverse within a day. Over the past 6 days, on modeled daily averages, Kampung Baru Subang averaged AQI 87 against 88, and it was the cleaner of the two on 1 of those days.
Is it safe to exercise outdoors in Ijok and Kampung Baru Subang today?
The advice is the same for both today. Air quality is satisfactory for everyone. Ijok reads AQI 34 and Kampung Baru Subang reads AQI 33.
Which has lost more forest, Ijok or Kampung Baru Subang?
Ijok has lost more: about 16,000 ha of forest within 10 km of its center from 2001 to 2025, against 6,890 ha around Kampung Baru Subang. 15,900 ha of that was cleared for good, for farms, mines or towns.
Which has more trees, Ijok or Kampung Baru Subang?
Ijok has more tree cover: 81.0% of the land within 2 km of its center against 25.3% around Kampung Baru Subang, or about 254,469 trees against 79,403. Both figures describe the same-sized circle of ground around each center, not the whole municipality.
How many more trees do Ijok and Kampung Baru Subang need?
Ijok needs about 0 more to reach its canopy target of 30%, and Kampung Baru Subang about 14,751 to reach 30%. The target starts at 30% of the land and rises where air quality is poor.
Why can two places 24 km apart read differently?
Air changes over short distances with traffic, industry, wind and hills, and each reading comes from the nearest ground stations or, where there are none, from a regional model. A gap of a few points between neighbors is within normal variation, while a gap that crosses an EPA band is worth noticing.
Are Ijok and Kampung Baru Subang measured the same way?
The method is the same: the US EPA index for air, and Sentinel-2 satellite imagery at 10 m detail over an identical radius for trees. Both readings come from nearby ground stations. Nothing is adjusted for population, city limits or climate.
How often does the Ijok vs Kampung Baru Subang comparison update?
The air readings refresh about once an hour, and each reading's local time is shown at the top of the page. Tree cover comes from the latest clear satellite image of each area (Sep 4, 2026 and Aug 15, 2026), and the forest figures are published yearly.
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