City report · Central Luzon, Philippines
Malolos Air quality today
Air quality in Malolos currently reads AQI 83 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
AQI 83
Air quality right now
Moderate
- PM2.5, fine particles (µg/m³)
- 26.4
- tree cover
- 19.5%
- trees in this area
- 53.5K
- more trees needed
- 28.8K
Measured across a 2 km radius around Caingin, Malolos, Bulacan, Philippines (12.57 km²), from a satellite image of Sep 25, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Malolos · AQI 83 (Moderate)
Malolos's tree count comes to 53,481 trees across 10.97 km² of land, 10 points below the 30% tree-cover level considered healthy for this area, so roughly 28,797 more trees would close the gap.
Air quality detail
Air quality in Malolos today: AQI 83, Moderate
Main pollutant: PM2.5 · Observed Nov 12, 00:04 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Quezon Road , 18.4 km away · median of 6 stations
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
26.4
PM10
—
NO₂
—
O₃
—
SO₂
—
CO
—
Data: OpenAQ · AirGradient, Clarity, Roy, DLSU
- Outdoor exercise
- Fine for most people; unusually sensitive people should take long or hard exercise easier
- Windows
- Fine to open; close them if you are sensitive to pollution
- Mask
- Not needed for most people
- Air purifier
- Worth running if you are sensitive
Over the last 7 days, the CAMS air-quality model put Malolos's daily AQI at 42 on average, from 31 on Nov 9 to an hourly peak of 62 on Nov 6.
Where Malolos stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Malolos: Below target
19.5% tree cover against a 30% healthy-neighborhood target, across 10.97 km² of land.
Trees in this area
53,481
Target trees
82,278
More trees needed
28,797
CO₂ if planted / yr
633.5 t
Deforestation · 2001–2025
How much forest has Malolos lost?
Since 2001, the area within 10 km of Malolos has lost about 102 hectares of forest (about 140 football pitches): 2.5% of the forest it had in 2000. Most of it (72%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from April 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 102 haabout 140 football pitches
- Share of its forest
- 2.5%of what there was in 2000
- Cleared for good
- 74 hadeforestation: turned into farms, mines or towns
The worst year was 2001, when about 11 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 | 5 ha | 11 ha |
| 2002 | 4 ha | 2 ha | 6 ha |
| 2003 | 4 ha | 1 ha | 5 ha |
| 2004 | 2 ha | 2 ha | 4 ha |
| 2005 | 5 ha | 3 ha | 8 ha |
| 2006 | 1 ha | 3 ha | 4 ha |
| 2007 | 3 ha | under 1 ha | 4 ha |
| 2008 | 1 ha | 2 ha | 3 ha |
| 2009 | 7 ha | 2 ha | 9 ha |
| 2010 | 8 ha | 3 ha | 11 ha |
| 2011 | under 1 ha | under 1 ha | 2 ha |
| 2012 | 4 ha | 2 ha | 6 ha |
| 2013 | under 1 ha | under 1 ha | 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | 6 ha | under 1 ha | 7 ha |
| 2017 | 3 ha | under 1 ha | 4 ha |
| 2018 | 3 ha | under 1 ha | 3 ha |
| 2019 | under 1 ha | under 1 ha | under 1 ha |
| 2020 | 1 ha | under 1 ha | 1 ha |
| 2021 | 2 ha | under 1 ha | 2 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | under 1 ha | under 1 ha | under 1 ha |
| 2024 | 4 ha | under 1 ha | 4 ha |
| 2025 | 6 ha | 1 ha | 8 ha |
What is causing deforestation around Malolos?
- Towns and roadscleared for good64% · 65 ha
- Farms, pasture and plantationscleared for good8.5% · 9 ha
- Storms, floods and other natural causescan grow back8.3% · 9 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
- 2,020 ha
- Forest in 2020
- 1,980 ha
- Overall change
- −46 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Malolos shrank from about 2,020 hectares to 1,980 hectares, a net loss of about 46 hectares (−2.3%). New forest grew on about 91 hectares, but 138 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 Malolos
Same 2 km radius, same index — so they compare directly.
- Baliuag15.4 km
Philippines
- Tree cover
- 42%
- Air quality
- 33
- Pandi15.9 km
Philippines
- Tree cover
- 42%
- Air quality
- 93
- Valenzuela23.2 km
Philippines
- Tree cover
- 14%
- Air quality
- 91
- San Fernando25.1 km
Philippines
- Tree cover
- 37%
- Air quality
- 33
- San Jose del Monte25.5 km
Philippines
- Tree cover
- 54%
- Air quality
- 90
- Norzagaray26.7 km
Philippines
- Tree cover
- 71%
- Air quality
- 92
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Frequently asked
Questions about Malolos
What is the air quality (AQI) in Malolos right now?
The latest reading for Malolos shows an AQI of 83 (Moderate), measured Nov 12, 00:04 local time by 6 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Quezon Road , 18.4 km away). The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Malolos today?
At AQI 83 (Moderate): fine for most people; unusually sensitive people should take long or hard exercise easier. Windows: fine to open; close them if you are sensitive to pollution. Masks: not needed for most people. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Malolos been like this week?
Over the last 7 days, the CAMS air-quality model put Malolos's daily AQI at 42 on average, from 31 on Nov 9 to an hourly peak of 62 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 Malolos lost since 2001?
Since 2001, the area within 10 km of Malolos has lost about 102 hectares of forest (about 140 football pitches): 2.5% of the forest it had in 2000. Most of it (72%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Malolos shrank from about 2,020 hectares to 1,980 hectares, a net loss of about 46 hectares (−2.3%). New forest grew on about 91 hectares, but 138 hectares were lost.
What is the tree count in Malolos?
Malolos has an estimated 53,481 trees across the 10.97 km² of land measured — 19.5% tree cover, 10 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Malolos need?
Malolos needs roughly 28,797 more trees to close a 10-point shortfall against its 30% tree-cover target — about 633.5 t of extra CO₂ absorbed per year once grown.
How are Malolos's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Caingin, 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 Caingin; the tree count is an estimate derived from that cover.
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