City report · Central Java, Indonesia
Pekalongan Air quality today
Air quality in Pekalongan currently reads AQI 110 (Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
AQI 110
Air quality right now
Unhealthy for sensitive groups
- PM2.5, fine particles (µg/m³)
- 37.3
- tree cover
- 20.7%
- trees in this area
- 65.0K
- more trees needed
- 44.9K
Measured across a 2 km radius around Pekalongan, Pekalongan City, Central Java, Indonesia (12.57 km²), from a satellite image of Sep 22, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Pekalongan · AQI 110 (Unhealthy for sensitive groups)
Pekalongan's tree count comes to 65,031 trees across 12.57 km², 14 points below the 35% tree-cover level considered healthy for this area, so roughly 44,925 more trees would close the gap.
Air quality detail
Air quality in Pekalongan today: AQI 110, Unhealthy for sensitive groups
Main pollutant: PM2.5 · Observed Nov 11, 17:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 105 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 2 station cities within 105 km, e.g. Semarang and West Ungaran
Health signal
Sensitive groups should limit long or intense outdoor activity.
PM2.5
37.3
PM10
48.8
NO₂
3.7
O₃
188.0
SO₂
18.9
CO
419.0
- 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 Pekalongan's daily AQI at 98 on average, from 86 on Nov 5 to an hourly peak of 148 on Nov 11.
This is the US EPA AQI. How it differs from Indonesia's ISPU
Where Pekalongan stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Pekalongan: Critically low
20.7% tree cover against a 35% healthy-neighborhood target, across 12.57 km².
Trees in this area
65,031
Target trees
109,956
More trees needed
44,925
CO₂ if planted / yr
988.4 t
Deforestation · 2001–2025
How much forest has Pekalongan lost?
Since 2001, the area within 10 km of Pekalongan has lost about 146 hectares of forest (about 200 football pitches): 5.2% of the forest it had in 2000. Most of it (91%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2017: satellite photo from August 2017 of a 5 × 5 km area about 7 km southeast of the city center.
- Forest lost since 2001
- 146 haabout 200 football pitches
- Share of its forest
- 5.2%of what there was in 2000
- Cleared for good
- 134 hadeforestation: turned into farms, mines or towns
The worst year was 2017, when about 29 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 | 3 ha | 1 ha | 4 ha |
| 2002 | 1 ha | under 1 ha | 2 ha |
| 2003 | under 1 ha | under 1 ha | 1 ha |
| 2004 | 1 ha | under 1 ha | 2 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | 4 ha | 1 ha | 5 ha |
| 2007 | 2 ha | 1 ha | 3 ha |
| 2008 | 2 ha | under 1 ha | 3 ha |
| 2009 | 4 ha | under 1 ha | 4 ha |
| 2010 | 2 ha | under 1 ha | 3 ha |
| 2011 | 2 ha | 2 ha | 4 ha |
| 2012 | 12 ha | 2 ha | 13 ha |
| 2013 | 2 ha | under 1 ha | 2 ha |
| 2014 | 5 ha | under 1 ha | 5 ha |
| 2015 | 2 ha | under 1 ha | 2 ha |
| 2016 | 3 ha | under 1 ha | 3 ha |
| 2017 | 29 ha | under 1 ha | 29 ha |
| 2018 | 4 ha | under 1 ha | 5 ha |
| 2019 | 2 ha | under 1 ha | 2 ha |
| 2020 | 6 ha | under 1 ha | 6 ha |
| 2021 | 10 ha | under 1 ha | 10 ha |
| 2022 | 5 ha | under 1 ha | 5 ha |
| 2023 | 25 ha | under 1 ha | 25 ha |
| 2024 | 3 ha | under 1 ha | 3 ha |
| 2025 | 4 ha | under 1 ha | 4 ha |
What is causing deforestation around Pekalongan?
- Farms, pasture and plantationscleared for good51% · 74 ha
- Towns and roadscleared for good41% · 60 ha
- Unknown causescause unknown8.6% · 13 ha
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
- 5,960 ha
- Forest in 2020
- 6,070 ha
- Overall change
- +104 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Pekalongan stayed about the same size, at about 6,070 hectares: new forest grew on about 232 hectares, and about 127 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 Pekalongan
Same 2 km radius, same index — so they compare directly.
- Pemalang32.3 km
Indonesia
- Tree cover
- 16%
- Air quality
- 97
- Tegal59.1 km
Indonesia
- Tree cover
- 12%
- Air quality
- 97
- Purwokerto76.7 km
Indonesia
- Tree cover
- 18%
- Air quality
- 53
- Semarang83.1 km
Indonesia
- Tree cover
- 17%
- Air quality
- 139
- Ungaran85.2 km
Indonesia
- Tree cover
- 52%
- Air quality
- 139
- Magelang88.1 km
Indonesia
- Tree cover
- 33%
- Air quality
- 54
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Frequently asked
Questions about Pekalongan
What is the air quality (AQI) in Pekalongan right now?
The latest reading for Pekalongan shows an AQI of 110 (Unhealthy for sensitive groups), observed Nov 11, 17:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 105 km, US EPA index. The main pollutant is PM2.5. Sensitive groups should limit long or intense outdoor activity.
Is it safe to exercise outside in Pekalongan today?
At AQI 110 (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 Pekalongan been like this week?
Over the last 7 days, the CAMS air-quality model put Pekalongan's daily AQI at 98 on average, from 86 on Nov 5 to an hourly peak of 148 on Nov 11. On 2 of those days the average was above 100, unhealthy for sensitive groups.
Is Pekalongan'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 Pekalongan lost since 2001?
Since 2001, the area within 10 km of Pekalongan has lost about 146 hectares of forest (about 200 football pitches): 5.2% of the forest it had in 2000. Most of it (91%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Comparing satellite maps from 2000 and 2020, the forest around Pekalongan stayed about the same size, at about 6,070 hectares: new forest grew on about 232 hectares, and about 127 hectares were lost.
What is the tree count in Pekalongan?
Pekalongan has an estimated 65,031 trees across the 12.57 km² measured — 20.7% tree cover, 14 percentage points short of the 35% tree-cover target set for this area.
How many more trees does Pekalongan need?
Pekalongan needs roughly 44,925 more trees to close a 14-point shortfall against its 35% tree-cover target — about 988.4 t of extra CO₂ absorbed per year once grown.
How are Pekalongan'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 Pekalongan; the tree count is an estimate derived from that cover.
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