City report · Calabarzon, Philippines
Rosario Air quality today
Air quality in Rosario currently reads AQI 77 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 77
Moderate
- PM2.5, fine particles (µg/m³)
- 22.3
- tree cover
- 56.4%
- trees in this area
- 177K
- more trees needed
- 0
Measured across a 2 km radius around Barangay B, Rosario, Batangas, Philippines (12.57 km²), from a satellite image of Sep 13, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Rosario · AQI 77 (Moderate)
Rosario's tree count comes to 177,186 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 Rosario today: AQI 77, Moderate
Main pollutant: PM2.5 · Observed Nov 10, 20:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 65 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 2 station cities within 65 km, e.g. City of Santa Rosa and Dasmariñas
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
22.3
PM10
15.5
NO₂
6.2
O₃
73.0
SO₂
4.8
CO
156.0
- 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 Rosario's daily AQI at 34 on average, from 23 on Nov 9 to an hourly peak of 54 on Nov 10.
Where Rosario stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Rosario: Healthy tree cover
56.4% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
177,186
Target trees
177,186
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Rosario lost?
Since 2001, the area within 10 km of Rosario has lost about 1,260 hectares of forest (about 1,800 football pitches): 11% 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 May 2017 of a 5 × 5 km area about 7 km northwest of the city center.
- Forest lost since 2001
- 1,260 haabout 1,800 football pitches
- Share of its forest
- 11%of what there was in 2000
- Cleared for good
- 1,250 hadeforestation: turned into farms, mines or towns
The worst year was 2010, when about 389 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 | 125 ha | under 1 ha | 125 ha |
| 2002 | 37 ha | under 1 ha | 37 ha |
| 2003 | 33 ha | under 1 ha | 33 ha |
| 2004 | 12 ha | under 1 ha | 12 ha |
| 2005 | 37 ha | under 1 ha | 37 ha |
| 2006 | 41 ha | under 1 ha | 41 ha |
| 2007 | 37 ha | under 1 ha | 37 ha |
| 2008 | 16 ha | under 1 ha | 16 ha |
| 2009 | 68 ha | under 1 ha | 68 ha |
| 2010 | 388 ha | 1 ha | 389 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | 25 ha | under 1 ha | 25 ha |
| 2013 | 28 ha | under 1 ha | 28 ha |
| 2014 | 60 ha | under 1 ha | 60 ha |
| 2015 | 6 ha | under 1 ha | 6 ha |
| 2016 | 53 ha | under 1 ha | 53 ha |
| 2017 | 21 ha | under 1 ha | 21 ha |
| 2018 | 30 ha | under 1 ha | 30 ha |
| 2019 | 21 ha | under 1 ha | 21 ha |
| 2020 | 10 ha | under 1 ha | 10 ha |
| 2021 | 14 ha | under 1 ha | 14 ha |
| 2022 | 26 ha | under 1 ha | 26 ha |
| 2023 | 24 ha | under 1 ha | 24 ha |
| 2024 | 90 ha | under 1 ha | 90 ha |
| 2025 | 55 ha | 1 ha | 56 ha |
What is causing deforestation around Rosario?
- Farms, pasture and plantationscleared for good91% · 1,140 ha
- Towns and roadscleared for good9.1% · 114 ha
Also: shifting farming.
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
- 18,600 ha
- Forest in 2020
- 18,300 ha
- Overall change
- −292 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Rosario stayed about the same size, at about 18,300 hectares: new forest grew on about 217 hectares, and about 508 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 Rosario
Same 2 km radius, same index — so they compare directly.
- Batangas18.8 km
Philippines
- Tree cover
- 28%
- Air quality
- 79
- Candelaria25.3 km
Philippines
- Tree cover
- 54%
- Air quality
- 56
- San Pablo27.9 km
Philippines
- Tree cover
- 45%
- Air quality
- 61
- Los Baños36.3 km
Philippines
- Tree cover
- 66%
- Air quality
- 62
- Calamba40.9 km
Philippines
- Tree cover
- 41%
- Air quality
- 61
- Lucena45.4 km
Philippines
- Tree cover
- 38%
- Air quality
- 84
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Frequently asked
Questions about Rosario
What is the air quality (AQI) in Rosario right now?
The latest reading for Rosario shows an AQI of 77 (Moderate), observed Nov 10, 20:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 65 km, US EPA index. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Rosario today?
At AQI 77 (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 Rosario been like this week?
Over the last 7 days, the CAMS air-quality model put Rosario's daily AQI at 34 on average, from 23 on Nov 9 to an hourly peak of 54 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 Rosario lost since 2001?
Since 2001, the area within 10 km of Rosario has lost about 1,260 hectares of forest (about 1,800 football pitches): 11% 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 Rosario stayed about the same size, at about 18,300 hectares: new forest grew on about 217 hectares, and about 508 hectares were lost.
What is the tree count in Rosario?
Rosario has an estimated 177,186 trees across the 12.57 km² measured — 56.4% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Rosario need?
Rosario has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Rosario's air quality and tree cover measured?
Air quality comes from ground monitoring stations via OpenAQ where one reports nearby, and otherwise, as here, from the Open-Meteo / CAMS model, which may differ from street-level monitors. 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 B; the tree count is an estimate derived from that cover.
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