City report · Calabarzon, Philippines
Silang Air quality today
Air quality in Silang 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
- 62.2%
- trees in this area
- 195K
- more trees needed
- 0
Measured across a 2 km radius around Tubuan I, Silang, Cavite, Philippines (12.57 km²), from a satellite image of Jun 7, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Silang · AQI 9 (Good)
Silang's tree count comes to 195,407 trees across 12.57 km², already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Silang 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, 9.4 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 Silang's daily AQI at 40 on average, from 27 on Nov 9 to an hourly peak of 60 on Nov 6.
Where Silang stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Silang: Healthy tree cover
62.2% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
195,407
Target trees
195,407
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Silang lost?
Since 2001, the area within 10 km of Silang has lost about 761 hectares of forest (about 1,100 football pitches): 5.5% of the forest it had in 2000. Most of it (over 99%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations.
2017: satellite photo from April 2017 of a 5 × 5 km area about 3 km southwest of the city center.
- Forest lost since 2001
- 761 haabout 1,100 football pitches
- Share of its forest
- 5.5%of what there was in 2000
- Cleared for good
- 758 hadeforestation: turned into farms, mines or towns
The worst year was 2010, when about 72 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 | 6 ha | under 1 ha | 6 ha |
| 2002 | 8 ha | under 1 ha | 8 ha |
| 2003 | 31 ha | under 1 ha | 32 ha |
| 2004 | 27 ha | under 1 ha | 27 ha |
| 2005 | 35 ha | under 1 ha | 35 ha |
| 2006 | 43 ha | under 1 ha | 43 ha |
| 2007 | 43 ha | under 1 ha | 43 ha |
| 2008 | 13 ha | under 1 ha | 13 ha |
| 2009 | 42 ha | under 1 ha | 42 ha |
| 2010 | 72 ha | under 1 ha | 72 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | 21 ha | under 1 ha | 22 ha |
| 2013 | 9 ha | under 1 ha | 9 ha |
| 2014 | 50 ha | under 1 ha | 51 ha |
| 2015 | 11 ha | under 1 ha | 11 ha |
| 2016 | 50 ha | under 1 ha | 50 ha |
| 2017 | 37 ha | under 1 ha | 37 ha |
| 2018 | 63 ha | under 1 ha | 63 ha |
| 2019 | 60 ha | under 1 ha | 60 ha |
| 2020 | 12 ha | under 1 ha | 12 ha |
| 2021 | 18 ha | under 1 ha | 18 ha |
| 2022 | 34 ha | under 1 ha | 34 ha |
| 2023 | 17 ha | under 1 ha | 17 ha |
| 2024 | 44 ha | under 1 ha | 44 ha |
| 2025 | 14 ha | under 1 ha | 14 ha |
What is causing deforestation around Silang?
- Farms, pasture and plantationscleared for good71% · 541 ha
- Towns and roadscleared for good28% · 216 ha
Also: 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
- 19,700 ha
- Forest in 2020
- 19,100 ha
- Overall change
- −604 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Silang shrank from about 19,700 hectares to 19,100 hectares, a net loss of about 604 hectares (−3.1%). New forest grew on about 174 hectares, but 778 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 Silang
Same 2 km radius, same index — so they compare directly.
- Dasmariñas13.2 km
Philippines
- Tree cover
- 42%
- Air quality
- 36
- Santa Rosa18.5 km
Philippines
- Tree cover
- 31%
- Air quality
- 9
- Calamba20.9 km
Philippines
- Tree cover
- 41%
- Air quality
- 9
- Muntinlupa21.1 km
Philippines
- Tree cover
- 32%
- Air quality
- 27
- Imus24.1 km
Philippines
- Tree cover
- 33%
- Air quality
- 52
- Los Baños29.6 km
Philippines
- Tree cover
- 66%
- Air quality
- 9
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Frequently asked
Questions about Silang
What is the air quality (AQI) in Silang right now?
The latest reading for Silang shows an AQI of 9 (Good), measured Nov 11, 23:00 local time by the DLSU Laguna ground monitoring station, 9.4 km away, via OpenAQ. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Silang 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 Silang been like this week?
Over the last 7 days, the CAMS air-quality model put Silang's daily AQI at 40 on average, from 27 on Nov 9 to an hourly peak of 60 on Nov 6. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Silang lost since 2001?
Since 2001, the area within 10 km of Silang has lost about 761 hectares of forest (about 1,100 football pitches): 5.5% of the forest it had in 2000. Most of it (over 99%) was deforestation, forest cleared for good, mainly for farms, pasture and plantations. Comparing satellite maps from 2000 and 2020, the forest around Silang shrank from about 19,700 hectares to 19,100 hectares, a net loss of about 604 hectares (−3.1%). New forest grew on about 174 hectares, but 778 hectares were lost.
What is the tree count in Silang?
Silang has an estimated 195,407 trees across the 12.57 km² measured — 62.2% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Silang need?
Silang has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Silang's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Tubuan I, 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 Tubuan I; the tree count is an estimate derived from that cover.
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