City report · Perak, Malaysia
Sitiawan Air quality today
Air quality in Sitiawan currently reads AQI 70 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 70
Moderate
- PM2.5, fine particles (µg/m³)
- 19.2
- tree cover
- 45.0%
- trees in this area
- 141K
- more trees needed
- 0
Measured across a 2 km radius around Taman Teratai, 32000 Sitiawan, Perak, Malaysia (12.57 km²), from a satellite image of Jun 6, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Sitiawan · AQI 70 (Moderate)
Sitiawan's tree count comes to 141,372 trees across 12.57 km², already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Sitiawan today: AQI 70, Moderate
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 · Seri Manjung, Perak, Malaysia, 4.4 km away
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
19.2
PM10
23.8
NO₂
—
O₃
—
SO₂
—
CO
—
Data: World Air Quality Index Project, Malaysia Department of Environment (DOE); Air Polluant Index Management System
- Outdoor exercise
- 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
- Mask
- Not needed for most people
- Air purifier
- Worth running if you are sensitive
Over the last 7 days, the CAMS air-quality model put Sitiawan's daily AQI at 51 on average, from 41 on Nov 5 to an hourly peak of 76 on Nov 4.
This is the US EPA AQI. How it differs from Malaysia's API (IPU) · The full guide
Where Sitiawan stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Sitiawan: Healthy tree cover
45.0% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
141,372
Target trees
141,372
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Sitiawan lost?
Since 2001, the area within 10 km of Sitiawan has lost about 7,600 hectares of forest (about 11,000 football pitches): 55% of the forest it had in 2000. Most of it (100%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2017: satellite photo from March 2017 of a 5 × 5 km area about 7 km southeast of the city center.
- Forest lost since 2001
- 7,600 haabout 11,000 football pitches
- Share of its forest
- 55%of what there was in 2000
- Cleared for good
- 7,600 hadeforestation: turned into farms, mines or towns
Forest loss is slowing down: about 213 hectares a year in 2021–2025, down from 529 hectares a year in 2016–2020. The worst year was 2017, when about 772 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 | 94 ha | under 1 ha | 94 ha |
| 2002 | 345 ha | under 1 ha | 345 ha |
| 2003 | 273 ha | under 1 ha | 273 ha |
| 2004 | 150 ha | under 1 ha | 150 ha |
| 2005 | 213 ha | under 1 ha | 213 ha |
| 2006 | 101 ha | under 1 ha | 101 ha |
| 2007 | 142 ha | under 1 ha | 142 ha |
| 2008 | 91 ha | under 1 ha | 91 ha |
| 2009 | 177 ha | under 1 ha | 177 ha |
| 2010 | 447 ha | under 1 ha | 447 ha |
| 2011 | 201 ha | under 1 ha | 201 ha |
| 2012 | 263 ha | under 1 ha | 263 ha |
| 2013 | 239 ha | under 1 ha | 239 ha |
| 2014 | 405 ha | under 1 ha | 405 ha |
| 2015 | 745 ha | under 1 ha | 745 ha |
| 2016 | 453 ha | under 1 ha | 453 ha |
| 2017 | 772 ha | under 1 ha | 772 ha |
| 2018 | 620 ha | under 1 ha | 620 ha |
| 2019 | 476 ha | under 1 ha | 476 ha |
| 2020 | 325 ha | under 1 ha | 325 ha |
| 2021 | 151 ha | under 1 ha | 151 ha |
| 2022 | 198 ha | under 1 ha | 198 ha |
| 2023 | 242 ha | under 1 ha | 242 ha |
| 2024 | 162 ha | under 1 ha | 162 ha |
| 2025 | 311 ha | under 1 ha | 311 ha |
What is causing deforestation around Sitiawan?
- Farms, pasture and plantationscleared for good87% · 6,630 ha
- Towns and roadscleared for good11% · 857 ha
- Mining and energycleared for good1.4% · 109 ha
Also: 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
- 17,900 ha
- Forest in 2020
- 17,100 ha
- Overall change
- −815 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Sitiawan shrank from about 17,900 hectares to 17,100 hectares, a net loss of about 815 hectares (−4.6%). New forest grew on about 2,710 hectares, but 3,530 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
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Frequently asked
Questions about Sitiawan
What is the air quality (AQI) in Sitiawan right now?
The latest reading for Sitiawan shows an AQI of 70 (Moderate), measured Nov 11, 23:00 local time by the Seri Manjung, Perak, Malaysia ground monitoring station, 4.4 km away, via OpenAQ. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Sitiawan today?
At AQI 70 (Moderate): 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. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Sitiawan been like this week?
Over the last 7 days, the CAMS air-quality model put Sitiawan's daily AQI at 51 on average, from 41 on Nov 5 to an hourly peak of 76 on Nov 4. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
Is Sitiawan'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 Sitiawan lost since 2001?
Since 2001, the area within 10 km of Sitiawan has lost about 7,600 hectares of forest (about 11,000 football pitches): 55% of the forest it had in 2000. Most of it (100%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Forest loss is slowing down: about 213 hectares a year in 2021–2025, down from 529 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Sitiawan shrank from about 17,900 hectares to 17,100 hectares, a net loss of about 815 hectares (−4.6%). New forest grew on about 2,710 hectares, but 3,530 hectares were lost.
What is the tree count in Sitiawan?
Sitiawan has an estimated 141,372 trees across the 12.57 km² measured — 45.0% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Sitiawan need?
Sitiawan has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Sitiawan's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Taman Teratai, 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 Taman Teratai; the tree count is an estimate derived from that cover.
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