City report · Riau, Indonesia
Dumai Air quality today
Air quality in Dumai currently reads AQI 28 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 28
Good
- PM2.5, fine particles (µg/m³)
- 5.3
- tree cover
- 21.7%
- trees in this area
- 68.2K
- more trees needed
- 26.1K
Measured across a 2 km radius around Dumai, Dumai City, Riau, Indonesia (12.57 km²), from a satellite image of Aug 7, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Dumai · AQI 28 (Good)
Dumai's tree count comes to 68,173 trees across 12.57 km², 8 points below the 30% tree-cover level considered healthy for this area, so roughly 26,075 more trees would close the gap.
Air quality detail
Air quality in Dumai today: AQI 28, Good
Main pollutant: PM2.5 · Observed Nov 11, 03:00 local time via Open-Meteo / CAMS, corrected with 17 ground-station cities within 185 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 17 station cities within 185 km, e.g. Port Dickson and Malacca
Health signal
Air quality is satisfactory for everyone.
PM2.5
5.3
PM10
8.8
NO₂
10.5
O₃
10.0
SO₂
2.8
CO
244.0
- 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 Dumai's daily AQI at 31 on average, from 22 on Nov 7 to an hourly peak of 56 on Nov 6.
This is the US EPA AQI. How it differs from Indonesia's ISPU
Where Dumai stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Dumai: Below target
21.7% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
68,173
Target trees
94,248
More trees needed
26,075
CO₂ if planted / yr
573.6 t
Deforestation · 2001–2025
How much forest has Dumai lost?
Since 2001, the area within 10 km of Dumai has lost about 7,970 hectares of forest (about 11,000 football pitches): 51% of the forest it had in 2000. Most of it (89%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2018: satellite photo from April 2018 of a 5 × 5 km area about 7 km west of the city center.
- Forest lost since 2001
- 7,970 haabout 11,000 football pitches
- Share of its forest
- 51%of what there was in 2000
- Cleared for good
- 7,070 hadeforestation: turned into farms, mines or towns
Forest loss is slowing down: about 209 hectares a year in 2021–2025, down from 383 hectares a year in 2016–2020. The worst year was 2014, when about 1,390 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 | 35 ha | 7 ha | 42 ha |
| 2002 | 415 ha | 59 ha | 474 ha |
| 2003 | 91 ha | 25 ha | 115 ha |
| 2004 | 107 ha | 2 ha | 109 ha |
| 2005 | 343 ha | 54 ha | 397 ha |
| 2006 | 218 ha | 20 ha | 238 ha |
| 2007 | 129 ha | 5 ha | 134 ha |
| 2008 | 137 ha | 15 ha | 152 ha |
| 2009 | 413 ha | 60 ha | 473 ha |
| 2010 | 500 ha | 36 ha | 536 ha |
| 2011 | 234 ha | 4 ha | 238 ha |
| 2012 | 367 ha | 30 ha | 397 ha |
| 2013 | 135 ha | 39 ha | 174 ha |
| 2014 | 1,040 ha | 346 ha | 1,390 ha |
| 2015 | 128 ha | 13 ha | 141 ha |
| 2016 | 471 ha | 50 ha | 521 ha |
| 2017 | 479 ha | 19 ha | 498 ha |
| 2018 | 398 ha | 44 ha | 442 ha |
| 2019 | 264 ha | 13 ha | 277 ha |
| 2020 | 169 ha | 9 ha | 178 ha |
| 2021 | 204 ha | 11 ha | 215 ha |
| 2022 | 170 ha | 13 ha | 183 ha |
| 2023 | 182 ha | 6 ha | 188 ha |
| 2024 | 204 ha | 8 ha | 212 ha |
| 2025 | 233 ha | 12 ha | 245 ha |
What is causing deforestation around Dumai?
- Farms, pasture and plantationscleared for good85% · 6,810 ha
- Wildfirescan grow back11% · 874 ha
- Towns and roadscleared for good3% · 238 ha
Also: logging, mining and energy, 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
- 13,000 ha
- Forest in 2020
- 13,000 ha
- Overall change
- −2 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Dumai stayed about the same size, at about 13,000 hectares: new forest grew on about 2,980 hectares, and about 2,980 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 Dumai
Same 2 km radius, same index — so they compare directly.
- Port Dickson103.1 km
Malaysia
- Tree cover
- 33%
- Air quality
- 65
- Malacca106.3 km
Malaysia
- Tree cover
- 21%
- Air quality
- 73
- Sepang119.1 km
Malaysia
- Tree cover
- 74%
- Air quality
- 64
- Seremban130.3 km
Malaysia
- Tree cover
- 39%
- Air quality
- 58
- Muar131.9 km
Malaysia
- Tree cover
- 27%
- Air quality
- 27
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Frequently asked
Questions about Dumai
What is the air quality (AQI) in Dumai right now?
The latest reading for Dumai shows an AQI of 28 (Good), observed Nov 11, 03:00 local time via Open-Meteo / CAMS, corrected with 17 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 Dumai today?
At AQI 28 (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 Dumai been like this week?
Over the last 7 days, the CAMS air-quality model put Dumai's daily AQI at 31 on average, from 22 on Nov 7 to an hourly peak of 56 on Nov 6. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
Is Dumai's AQI the same as Indonesia's ISPU?
No. Airleaf shows the US EPA Air Quality Index (AQI), the scale used by IQAir and most air-quality apps. Indonesia's official index is the ISPU (Indeks Standar Pencemar Udara), published by the environment ministry from its own monitoring stations. Its bands are 0–50 Baik (good), 51–100 Sedang (moderate), 101–200 Tidak Sehat (unhealthy), 201–300 Sangat Tidak Sehat (very unhealthy) and over 300 Berbahaya (hazardous). The two indexes use different breakpoints and averaging times, so the same air can score differently on each.
How much forest has the area around Dumai lost since 2001?
Since 2001, the area within 10 km of Dumai has lost about 7,970 hectares of forest (about 11,000 football pitches): 51% of the forest it had in 2000. Most of it (89%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Forest loss is slowing down: about 209 hectares a year in 2021–2025, down from 383 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Dumai stayed about the same size, at about 13,000 hectares: new forest grew on about 2,980 hectares, and about 2,980 hectares were lost.
What is the tree count in Dumai?
Dumai has an estimated 68,173 trees across the 12.57 km² measured — 21.7% tree cover, 8 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Dumai need?
Dumai needs roughly 26,075 more trees to close a 8-point shortfall against its 30% tree-cover target — about 573.6 t of extra CO₂ absorbed per year once grown.
How are Dumai'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 Dumai; the tree count is an estimate derived from that cover.
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