Indonesia · Central Java · 16 cities
Air quality in Central Java today The AQI right now, city by city
Right now, Purwokerto has the cleanest air of the 16 cities we track in Central Java (AQI 53, Moderate), and Purwodadi the worst (AQI 182, Unhealthy). Ungaran has the most tree cover, at 51.5% — #14 of 155 cities measured in Indonesia.
Every city is measured the same way, over the same 2 km around its center: the air quality right now, from ground stations where there are any, and its tree cover.
AQI 99
Average right now
Moderate
- cities tracked
- 16
- average tree cover
- 27.0%
- Indonesia: 28.0%
- worst air now: Purwodadi
- 182
- cleanest air now: Purwokerto
- 53
Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous, and it reads differently from Indonesia's ISPU. Measured by Airleaf, refreshed hourly.
Central Java · average AQI 99
Air quality today across Central Java, city by city
| Semarang | 139Unhealthy for sensitive groups | 16.6% | 57.8K | #118 of 155 |
|---|---|---|---|---|
| Jepara | 71Moderate | 38.3% | — | #35 of 155 |
| Surakarta | 77Moderate | 12.7% | 54.4K | #133 of 155 |
| Pekalongan | 110Unhealthy for sensitive groups | 20.7% | 44.9K | #102 of 155 |
| Tegal | 97Moderate | 12.1% | 55.9K | #138 of 155 |
| Cilacap | 84Moderate | 15.1% | 40.2K | #128 of 155 |
| Purwokerto | 53Moderate | 18.3% | 36.8K | #112 of 155 |
| Salatiga | 169Unhealthy | 40.9% | — | #30 of 155 |
| Pemalang | 97Moderate | 16.0% | 43.3K | #120 of 155 |
| Ungaran | 139Unhealthy for sensitive groups | 51.5% | — | #14 of 155 |
| Batang | 68Moderate | 45.8% | — | #24 of 155 |
| Purwodadi | 182Unhealthy | 25.3% | 46.2K | #76 of 155 |
| Magelang | 54Moderate | 32.9% | — | #47 of 155 |
| Klaten | 53Moderate | 26.1% | 12.3K | #72 of 155 |
| Kedungwuni | 79Moderate | 35.6% | — | #40 of 155 |
| Pati | 117Unhealthy for sensitive groups | 24.8% | 32.0K | #79 of 155 |
Air quality is the US AQI from ground monitoring stations via OpenAQ where available, otherwise the Open-Meteo / CAMS model, refreshed hourly. Tree cover is measured within 2 km of each city center from Sentinel-2 imagery; the rank compares every city measured in Indonesia.
Is this 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.
Deforestation · 2001–2025
How much forest has Central Java lost?
Since 2001, Central Java has lost about 64,700 hectares of forest (about 91,000 football pitches): 4.2% of the forest it had in 2000. Most of it (88%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
- Forest lost since 2001
- 64,700 haabout 91,000 football pitches
- Share of its forest
- 4.2%of what there was in 2000
- Cleared for good
- 56,800 hadeforestation: turned into farms, mines or towns
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 1,880 ha | 804 ha | 2,680 ha |
| 2002 | 1,460 ha | 448 ha | 1,900 ha |
| 2003 | 505 ha | 289 ha | 794 ha |
| 2004 | 2,800 ha | 881 ha | 3,680 ha |
| 2005 | 1,440 ha | 261 ha | 1,700 ha |
| 2006 | 3,170 ha | 325 ha | 3,490 ha |
| 2007 | 2,570 ha | 338 ha | 2,910 ha |
| 2008 | 2,420 ha | 224 ha | 2,640 ha |
| 2009 | 2,760 ha | 274 ha | 3,040 ha |
| 2010 | 1,230 ha | 154 ha | 1,380 ha |
| 2011 | 3,960 ha | 390 ha | 4,350 ha |
| 2012 | 2,110 ha | 314 ha | 2,430 ha |
| 2013 | 1,060 ha | 126 ha | 1,190 ha |
| 2014 | 2,610 ha | 241 ha | 2,850 ha |
| 2015 | 1,690 ha | 102 ha | 1,790 ha |
| 2016 | 1,990 ha | 377 ha | 2,360 ha |
| 2017 | 3,210 ha | 182 ha | 3,390 ha |
| 2018 | 2,410 ha | 142 ha | 2,550 ha |
| 2019 | 2,540 ha | 219 ha | 2,760 ha |
| 2020 | 2,360 ha | 363 ha | 2,730 ha |
| 2021 | 1,840 ha | 248 ha | 2,090 ha |
| 2022 | 1,890 ha | 229 ha | 2,120 ha |
| 2023 | 4,440 ha | 247 ha | 4,690 ha |
| 2024 | 2,470 ha | 286 ha | 2,760 ha |
| 2025 | 2,070 ha | 359 ha | 2,430 ha |
Forest loss has stayed about the same: about 2,810 hectares a year in 2021–2025, against 2,760 hectares a year in 2016–2020. The worst year was 2023, when about 4,690 hectares of forest were lost.
What is causing deforestation in Central Java?
- Farms, pasture and plantationscleared for good82% · 53,100 ha
- Loggingcan grow back5.9% · 3,780 ha
- Towns and roadscleared for good4.9% · 3,140 ha
Also: shifting farming, storms, floods and other natural causes, mining and energy, wildfires, unknown causes.
Causes for 2025 are estimates, based on what caused forest loss in the same places up to 2024.
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. How it's measured
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