City report · Calabarzon, Philippines
Calamba Air quality today
Air quality in Calamba currently reads AQI 9 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 9
Good
- PM2.5, fine particles (µg/m³)
- 1.6
- tree cover
- 40.6%
- trees in this area
- 127K
- more trees needed
- 0
Measured across a 2 km radius around Barangay 5, Calamba, 4027 Laguna, Philippines (12.57 km²), from a satellite image of Sep 25, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Calamba · AQI 9 (Good)
Calamba's tree count comes to 126,783 trees across 12.49 km² of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Calamba today: AQI 9, Good
Main pollutant: PM2.5 · Observed Nov 11, 23:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · DLSU Laguna, 14.3 km away
Health signal
Air quality is satisfactory for everyone.
PM2.5
1.6
PM10
—
NO₂
—
O₃
—
SO₂
—
CO
—
Data: OpenAQ · AirGradient, DLSU
- 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 Calamba's daily AQI at 31 on average, from 18 on Nov 9 to an hourly peak of 55 on Nov 10.
Where Calamba stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Calamba: Healthy tree cover
40.6% tree cover against a 30% healthy-neighborhood target, across 12.49 km² of land.
Trees in this area
126,783
Target trees
126,783
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Calamba lost?
Since 2001, the area within 10 km of Calamba has lost about 197 hectares of forest (about 280 football pitches): 3.6% of the forest it had in 2000. Most of it (87%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from March 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 197 haabout 280 football pitches
- Share of its forest
- 3.6%of what there was in 2000
- Cleared for good
- 170 hadeforestation: turned into farms, mines or towns
The worst year was 2001, when about 27 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 | 24 ha | 3 ha | 27 ha |
| 2002 | 5 ha | under 1 ha | 6 ha |
| 2003 | 7 ha | 3 ha | 10 ha |
| 2004 | 6 ha | under 1 ha | 7 ha |
| 2005 | 14 ha | under 1 ha | 15 ha |
| 2006 | 18 ha | 2 ha | 20 ha |
| 2007 | 12 ha | 6 ha | 18 ha |
| 2008 | 7 ha | under 1 ha | 7 ha |
| 2009 | 12 ha | 2 ha | 14 ha |
| 2010 | 14 ha | 2 ha | 16 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | 7 ha | 3 ha | 10 ha |
| 2013 | 5 ha | 1 ha | 6 ha |
| 2014 | 5 ha | under 1 ha | 6 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | 2 ha | under 1 ha | 2 ha |
| 2017 | 7 ha | under 1 ha | 7 ha |
| 2018 | 6 ha | under 1 ha | 6 ha |
| 2019 | under 1 ha | under 1 ha | under 1 ha |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | under 1 ha | under 1 ha | under 1 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | 10 ha | under 1 ha | 10 ha |
| 2024 | 4 ha | under 1 ha | 4 ha |
| 2025 | 4 ha | under 1 ha | 4 ha |
What is causing deforestation around Calamba?
- Towns and roadscleared for good67% · 132 ha
- Farms, pasture and plantationscleared for good19% · 38 ha
- Shifting farmingcan grow back5.2% · 10 ha
Also: storms, floods and other natural causes, logging, 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
- 7,870 ha
- Forest in 2020
- 7,960 ha
- Overall change
- +96 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Calamba stayed about the same size, at about 7,960 hectares: new forest grew on about 251 hectares, and about 155 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 Calamba
Same 2 km radius, same index — so they compare directly.
- Santa Rosa12.6 km
Philippines
- Tree cover
- 31%
- Air quality
- 9
- Silang20.9 km
Philippines
- Tree cover
- 62%
- Air quality
- 9
- San Pablo23.5 km
Philippines
- Tree cover
- 45%
- Air quality
- 34
- Muntinlupa23.6 km
Philippines
- Tree cover
- 32%
- Air quality
- 27
- Dasmariñas27.9 km
Philippines
- Tree cover
- 42%
- Air quality
- 36
- Santa Cruz28.1 km
Philippines
- Tree cover
- 19%
- Air quality
- 39
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Frequently asked
Questions about Calamba
What is the air quality (AQI) in Calamba right now?
The latest reading for Calamba shows an AQI of 9 (Good), measured Nov 11, 23:00 local time by the DLSU Laguna ground monitoring station, 14.3 km away, via OpenAQ. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Calamba today?
At AQI 9 (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 Calamba been like this week?
Over the last 7 days, the CAMS air-quality model put Calamba's daily AQI at 31 on average, from 18 on Nov 9 to an hourly peak of 55 on Nov 10. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Calamba lost since 2001?
Since 2001, the area within 10 km of Calamba has lost about 197 hectares of forest (about 280 football pitches): 3.6% of the forest it had in 2000. Most of it (87%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Calamba stayed about the same size, at about 7,960 hectares: new forest grew on about 251 hectares, and about 155 hectares were lost.
What is the tree count in Calamba?
Calamba has an estimated 126,783 trees across the 12.49 km² of land measured — 40.6% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Calamba need?
Calamba has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Calamba's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Barangay 5, 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 Barangay 5; the tree count is an estimate derived from that cover.
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