Air quality comparison · Malaysia, 22 km apart
Bukit Rahman Putra vs Kapar Air quality index (AQI) today
Bukit Rahman Putra has cleaner air than Kapar right now: AQI 63 (Moderate) against 68 (Moderate).
Both sit in the same EPA band, so the health advice is the same for each today. But over the past 6 days, on modeled daily averages, Kapar averaged AQI 54 against 88, and it was the cleaner of the two on 6 of those days. Kapar has lost more forest since 2001. Kapar has more tree cover.
Malaysia
AQI 63
Moderate
Cleaner right now
- PM2.5
- 15.8 µg/m³1.1× WHO guideline
- Main pollutant
- PM2.5
- Source
- Ground station
- Reading
- Nov 12, 00:00 local
Malaysia
AQI 68
Moderate
Cleaner right now
- PM2.5
- 18.3 µg/m³1.2× WHO guideline
- Main pollutant
- PM2.5
- Source
- Ground station
- Reading
- Nov 11, 23:00 local
Updated . Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf.
Bukit Rahman Putra63Kapar68
Head to head
Bukit Rahman Putra vs Kapar at a glance
Bukit Rahman Putra is ahead on 3 of 6 measures, and Kapar on 2. The better figure in each row is marked.
| Bukit Rahman Putra | Kapar | |
|---|---|---|
| Air quality nowUS AQI. Lower is better. | 63 (better) | 68 |
| PM2.5Fine particles, µg/m³. | 15.8 (better) | 18.3 |
| Past week's averageUS AQI, 6 days. | 88 | 54 (better) |
| Forest lost since 2001Within 10 km of the center. | 7,500 ha (better) | 9,700 ha |
| Tree coverWithin 2 km of the center. | 38.0% | 54.5% (better) |
| Trees still neededTo reach a healthy canopy. | 0 | 0 |
Air quality today
What is the air like in Bukit Rahman Putra and Kapar right now?
Bukit Rahman Putra has cleaner air than Kapar right now: AQI 63 (Moderate) against 68 (Moderate). PM2.5 is setting the index in both.
Bukit Rahman Putra's PM2.5 is about 1.1× the WHO's 24-hour guideline of 15 µg/m³. Kapar's PM2.5 is about 1.2× the WHO's 24-hour guideline of 15 µg/m³.
Both readings come from nearby ground stations.
Bukit Rahman PutraKapar
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).
Bukit Rahman Putra: Ground station · Zenia, 8.3 km away. Data: OpenAQ · AirGradient, Daniel.
Kapar: Ground station · Pelabuhan Kelang, Selangor, Malaysia, 13.6 km away · median of 3 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?
But over the past 6 days, on modeled daily averages, Kapar averaged AQI 54 against 88, and it was the cleaner of the two on 6 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
- Bukit Rahman Putra0Kapar6
- Average AQI
- Bukit Rahman Putra88Kapar54
- Worst day, AQI
- Bukit Rahman Putra92Kapar59
The daily numbers (6 days)
| Day | Bukit Rahman Putra | Kapar |
|---|---|---|
| Nov 5 | 92 | 50 |
| Nov 6 | 90 | 47 |
| Nov 7 | 83 | 57 |
| Nov 8 | 87 | 59 |
| Nov 9 | 83 | 57 |
| Nov 10 | 91 | 56 |
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 Bukit Rahman Putra and Kapar today?
Unusually sensitive people should consider limiting long outdoor exertion. Both are in the same EPA band today (Moderate), so the advice is the same.
Exercise outdoors
Fine for most people; unusually sensitive people should take long or hard exercise easier.
Windows
Fine to open; close them if you are sensitive to pollution.
Masks
Not needed for most people.
Air purifier
Worth running if you are sensitive.
Against everywhere else
How do Bukit Rahman Putra and Kapar compare with the rest of the world?
Right now Bukit Rahman Putra's air is cleaner than 45% of the 5,420 places Airleaf tracks, and Kapar's is cleaner than 39%. Within Malaysia, that is 44% and 25% of its 56 measured places.
Cleaner air than…
- Bukit Rahman Putra
- Beats 45%
- Kapar
- Beats 39%
More tree cover than…
- Bukit Rahman Putra
- Beats 81%
- Kapar
- Beats 94%
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, Bukit Rahman Putra or Kapar?
Kapar has lost more: about 9,700 ha of forest within 10 km of its center from 2001 to 2025, against 7,500 ha around Bukit Rahman Putra. 9,690 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: 2017, with 666 ha lost.
Worst year: 2009, with 1,140 ha lost.
| Bukit Rahman Putra | Kapar | |
|---|---|---|
| Forest lost since 2001Cleared, burned or logged. | 7,500 ha (better) | 9,700 ha |
| Share of its forestOf what it had in 2000. | 45% (better) | 53% |
| Cleared for goodTurned into farms, mines or towns. | 7,450 ha (better) | 9,690 ha |
| Recent trend2021–2025 against the five years before. | Slowing down | Slowing down |
| Main known cause | Towns and roads (68%) | Farms, pasture and plantations (57%) |
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.
Bukit Rahman Putra
2017: satellite photo from February 2017 of a 5 × 5 km area about 7 km northwest of the city center.
Kapar
2017: satellite photo from February 2017 of a 5 × 5 km area about 4 km southeast of the city center.
Trees
Which has more trees, Bukit Rahman Putra or Kapar?
Kapar has more tree cover: 54.5% of the land within 2 km of its center against 38.0% around Bukit Rahman Putra, or about 171,217 trees against 119,261.
The dark mark is each place's canopy target: 30% of the land, raised where air quality is poor.
| Bukit Rahman Putra | Kapar | |
|---|---|---|
| Trees standingEstimated from the canopy area. | 119K | 171K (better) |
| Trees still neededTo reach the target. Fewer is better. | 0 | 0 |
| CO₂ absorbed each yearBy the trees already standing. | 2.6M kg | 3.8M kg (better) |
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
Bukit Rahman Putra vs Kapar: your questions answered
Is Bukit Rahman Putra cleaner than Kapar?
On air quality, yes, right now: Bukit Rahman Putra reads AQI 63 against 68, a gap of 5 points on the US EPA index. This is a live reading rather than an annual average, so it can reverse within a day. But over the past 6 days, on modeled daily averages, Kapar averaged AQI 54 against 88, and it was the cleaner of the two on 6 of those days.
Is it safe to exercise outdoors in Bukit Rahman Putra and Kapar today?
The advice is the same for both today. Unusually sensitive people should consider limiting long outdoor exertion. Bukit Rahman Putra reads AQI 63 and Kapar reads AQI 68.
Which has lost more forest, Bukit Rahman Putra or Kapar?
Kapar has lost more: about 9,700 ha of forest within 10 km of its center from 2001 to 2025, against 7,500 ha around Bukit Rahman Putra. 9,690 ha of that was cleared for good, for farms, mines or towns.
Which has more trees, Bukit Rahman Putra or Kapar?
Kapar has more tree cover: 54.5% of the land within 2 km of its center against 38.0% around Bukit Rahman Putra, or about 171,217 trees against 119,261. Both figures describe the same-sized circle of ground around each center, not the whole municipality.
How many more trees do Bukit Rahman Putra and Kapar need?
Bukit Rahman Putra needs about 0 more to reach its canopy target of 30%, and Kapar about 0 to reach 30%. The target starts at 30% of the land and rises where air quality is poor.
Why can two places 22 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 Bukit Rahman Putra and Kapar 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 Bukit Rahman Putra vs Kapar 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 (Aug 15, 2026 and Aug 15, 2026), and the forest figures are published yearly.
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