City report · Taiwan
Hsinchu Air quality today
Air quality in Hsinchu currently reads AQI 33 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 33
Good
- PM2.5, fine particles (µg/m³)
- 6.0
- tree cover
- 18.0%
- trees in this area
- 56.5K
- more trees needed
- 37.7K
Measured across a 2 km radius around Hsinchu, North District, Hsinchu City, Taiwan (12.57 km²), from a satellite image of Jul 20, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Hsinchu · AQI 33 (Good)
Hsinchu's tree count comes to 56,549 trees across 12.57 km², 12 points below the 30% tree-cover level considered healthy for this area, so roughly 37,699 more trees would close the gap.
Air quality detail
Air quality in Hsinchu today: AQI 33, Good
Main pollutant: PM2.5 · Observed Nov 12, 00:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · 新竹市 - 新竹, 400 m away
Health signal
Air quality is satisfactory for everyone.
PM2.5
6.0
PM10
7.0
NO₂
20.7
O₃
60.9
SO₂
2.1
CO
274.9
Data: OpenAQ · Taiwan, Ministry of Environment, Taiwan (Open Government Data License 1.0)
- 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 Hsinchu's daily AQI at 65 on average, from 57 on Nov 11 to an hourly peak of 96 on Nov 5.
Where Hsinchu stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Hsinchu: Below target
18.0% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
56,549
Target trees
94,248
More trees needed
37,699
CO₂ if planted / yr
829.4 t
Deforestation · 2001–2025
How much forest has Hsinchu lost?
Since 2001, the area within 10 km of Hsinchu has lost about 599 hectares of forest (about 840 football pitches): 9% of the forest it had in 2000. Most of it (79%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from August 2017 of a 5 × 5 km area about 7 km southeast of the city center.
- Forest lost since 2001
- 599 haabout 840 football pitches
- Share of its forest
- 9%of what there was in 2000
- Cleared for good
- 474 hadeforestation: turned into farms, mines or towns
The worst year was 2020, when about 56 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 | 15 ha | under 1 ha | 16 ha |
| 2002 | 10 ha | 2 ha | 13 ha |
| 2003 | 6 ha | 4 ha | 11 ha |
| 2004 | 2 ha | under 1 ha | 2 ha |
| 2005 | 8 ha | 10 ha | 18 ha |
| 2006 | 18 ha | 9 ha | 27 ha |
| 2007 | 11 ha | 6 ha | 17 ha |
| 2008 | 11 ha | 1 ha | 13 ha |
| 2009 | 17 ha | 9 ha | 26 ha |
| 2010 | 13 ha | 7 ha | 21 ha |
| 2011 | 9 ha | 5 ha | 13 ha |
| 2012 | 6 ha | under 1 ha | 7 ha |
| 2013 | 7 ha | 2 ha | 9 ha |
| 2014 | 14 ha | 3 ha | 17 ha |
| 2015 | 19 ha | 3 ha | 21 ha |
| 2016 | 26 ha | 9 ha | 35 ha |
| 2017 | 30 ha | 5 ha | 36 ha |
| 2018 | 29 ha | 4 ha | 33 ha |
| 2019 | 15 ha | 2 ha | 17 ha |
| 2020 | 39 ha | 17 ha | 56 ha |
| 2021 | 30 ha | 5 ha | 34 ha |
| 2022 | 36 ha | 5 ha | 42 ha |
| 2023 | 42 ha | 5 ha | 47 ha |
| 2024 | 33 ha | 4 ha | 38 ha |
| 2025 | 27 ha | 6 ha | 33 ha |
What is causing deforestation around Hsinchu?
- Towns and roadscleared for good66% · 394 ha
- Loggingcan grow back20% · 122 ha
- Farms, pasture and plantationscleared for good11% · 64 ha
Also: 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
- 9,570 ha
- Forest in 2020
- 10,200 ha
- Overall change
- +612 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Hsinchu grew from about 9,570 hectares to 10,200 hectares, a net gain of about 612 hectares (+6.4%). New forest grew on about 806 hectares, while 194 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 Hsinchu
What is the air quality (AQI) in Hsinchu right now?
The latest reading for Hsinchu shows an AQI of 33 (Good), measured Nov 12, 00:00 local time by the 新竹市 - 新竹 ground monitoring station, 400 m away, via OpenAQ. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Hsinchu today?
At AQI 33 (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 Hsinchu been like this week?
Over the last 7 days, the CAMS air-quality model put Hsinchu's daily AQI at 65 on average, from 57 on Nov 11 to an hourly peak of 96 on Nov 5. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Hsinchu lost since 2001?
Since 2001, the area within 10 km of Hsinchu has lost about 599 hectares of forest (about 840 football pitches): 9% of the forest it had in 2000. Most of it (79%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Hsinchu grew from about 9,570 hectares to 10,200 hectares, a net gain of about 612 hectares (+6.4%). New forest grew on about 806 hectares, while 194 hectares were lost.
What is the tree count in Hsinchu?
Hsinchu has an estimated 56,549 trees across the 12.57 km² measured — 18.0% tree cover, 12 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Hsinchu need?
Hsinchu needs roughly 37,699 more trees to close a 12-point shortfall against its 30% tree-cover target — about 829.4 t of extra CO₂ absorbed per year once grown.
How are Hsinchu's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Hsinchu, 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 Hsinchu; the tree count is an estimate derived from that cover.
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