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Air quality now: AQI38Good, Blumenau

City report · Santa Catarina, Brazil

Blumenau Air quality today

Air quality in Blumenau currently reads AQI 38 (Good): Air quality is satisfactory for everyone.

AQI 38

Air quality right now

Good

Main pollutant: PM2.5
PM2.5, fine particles (µg/m³)
6.9
tree cover
61.9%
trees in this area
187K
more trees needed
0

Measured across a 2 km radius around Centro, Blumenau - SC, Brazil (12.57 km²), from a satellite image of Aug 21, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.

Blumenau · AQI 38 (Good)

Dark green marks tree cover detected inside the study radius.Sentinel-2 L2A (ESA Copernicus) via Earth Search, captured Aug 21, 2026

Blumenau's tree count comes to 186,880 trees across 12.08 km² of land, already at or above the 30% tree-cover level considered healthy for this area.

Air quality detail

Air quality in Blumenau today: AQI 38, Good

Main pollutant: PM2.5 · Observed Nov 11, 02:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.

Model estimate · no ground station nearby

Health signal

Air quality is satisfactory for everyone.

PM2.5

6.9

PM10

10.7

NO₂

4.4

O₃

40.0

SO₂

1.2

CO

103.0

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 Blumenau's daily AQI at 35 on average, from 29 on Nov 6 to an hourly peak of 60 on Nov 5.

Last 7 daysavg 35 · peak 60
Nov 5: AQI 34 (peak 60)Nov 6: AQI 29 (peak 39)Nov 7: AQI 31 (peak 41)Nov 8: AQI 31 (peak 58)Nov 9: AQI 49 (peak 58)Nov 10: AQI 36 (peak 51)Nov 11: AQI 37 (peak 38)
Nov 5Nov 11

Where Blumenau stands: the most polluted cities in the world right now · the cleanest

Tree cover detail

Tree cover in Blumenau: Healthy tree cover

61.9% tree cover against a 30% healthy-neighborhood target, across 12.08 km² of land.

Target reached

Trees in this area

186,880

Target trees

186,880

More trees needed

0

CO₂ if planted / yr

0 kg

Deforestation · 2001–2025

How much forest has Blumenau lost?

Since 2001, the area within 10 km of Blumenau has lost about 1,250 hectares of forest (about 1,800 football pitches): 6.3% of the forest it had in 2000. Most of it (68%) was deforestation, forest cleared for good, mainly for towns and roads.

Satellite image of the area around Blumenau, January 2017

2017: satellite photo from January 2017 of a 5 × 5 km area about 7 km northeast of the city center.

Forest lost since 2001
1,250 haabout 1,800 football pitches
Share of its forest
6.3%of what there was in 2000
Cleared for good
848 hadeforestation: turned into farms, mines or towns

The worst year was 2005, when about 150 hectares of forest were lost.

Forest lost each year around Blumenau, 2001–2025

Hectares of forest lost each year

Forest lost each year around Blumenau, 2001–2025. Use the left and right arrow keys to read each year.150

Show the figures as a table
Forest lost each year around Blumenau, 2001–2025
YearCleared for goodCan grow backTotal
200143 ha20 ha62 ha
200212 ha27 ha39 ha
200317 ha3 ha21 ha
200479 ha39 ha118 ha
200557 ha93 ha150 ha
200647 ha49 ha96 ha
200731 ha13 ha44 ha
200860 ha39 ha99 ha
200933 ha7 ha40 ha
201065 ha4 ha69 ha
201129 ha4 ha32 ha
201232 ha14 ha46 ha
20139 ha2 ha11 ha
201439 ha6 ha46 ha
201516 ha3 ha20 ha
201632 ha9 ha41 ha
201744 ha13 ha57 ha
201827 ha5 ha31 ha
201920 ha6 ha26 ha
202024 ha5 ha29 ha
202128 ha3 ha31 ha
202244 ha17 ha61 ha
202324 ha8 ha32 ha
202415 ha10 ha24 ha
202520 ha6 ha27 ha

What is causing deforestation around Blumenau?

  • Towns and roadscleared for good60% · 747 ha
  • Loggingcan grow back31% · 386 ha
  • Farms, pasture and plantationscleared for good7.9% · 99 ha

Also: storms, floods and other natural causes, mining and energy, shifting farming, 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
19,600 ha
Forest in 2020
19,600 ha
Overall change
−22 haless forest than in 2000

Comparing satellite maps from 2000 and 2020, the forest around Blumenau stayed about the same size, at about 19,600 hectares: new forest grew on about 557 hectares, and about 578 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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Blumenau air quality (AQI) and tree cover — measured by Airleaf
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Frequently asked

Questions about Blumenau

What is the air quality (AQI) in Blumenau right now?

The latest reading for Blumenau shows an AQI of 38 (Good), observed Nov 11, 02:00 local time via Open-Meteo / CAMS, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.

Is it safe to exercise outside in Blumenau today?

At AQI 38 (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 Blumenau been like this week?

Over the last 7 days, the CAMS air-quality model put Blumenau's daily AQI at 35 on average, from 29 on Nov 6 to an hourly peak of 60 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 Blumenau lost since 2001?

Since 2001, the area within 10 km of Blumenau has lost about 1,250 hectares of forest (about 1,800 football pitches): 6.3% of the forest it had in 2000. Most of it (68%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Blumenau stayed about the same size, at about 19,600 hectares: new forest grew on about 557 hectares, and about 578 hectares were lost.

What is the tree count in Blumenau?

Blumenau has an estimated 186,880 trees across the 12.08 km² of land measured — 61.9% tree cover, already past the 30% tree-cover target set for this area.

How many more trees does Blumenau need?

Blumenau has already reached its tree-cover target, so no additional trees are needed to close the gap.

How are Blumenau'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 Centro; the tree count is an estimate derived from that cover.

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