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City report · Rio Grande do Sul, Brazil

Novo Hamburgo Air quality today

Air quality in Novo Hamburgo currently reads AQI 28 (Good): Air quality is satisfactory for everyone.

Air quality right now

AQI 28

Good

Main pollutant: PM2.5
PM2.5, fine particles (µg/m³)
3.3
tree cover
31.4%
trees in this area
98.6K
more trees needed
0

Measured across a 2 km radius around Guarani, Novo Hamburgo - RS, Brazil (12.57 km²), from a satellite image of Nov 9, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.

Novo Hamburgo · AQI 28 (Good)

Dark green marks tree cover detected inside the study radius.Sentinel-2 L2A (ESA Copernicus) via Earth Search, captured Nov 9, 2026

Novo Hamburgo's tree count comes to 98,646 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 Novo Hamburgo today: AQI 28, 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

3.3

PM10

3.8

NO₂

4.6

O₃

36.0

SO₂

0.8

CO

97.0

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 Novo Hamburgo's daily AQI at 39 on average, from 30 on Nov 6 to an hourly peak of 65 on Nov 9.

Last 7 daysavg 39 · peak 65
Nov 5: AQI 40 (peak 58)Nov 6: AQI 30 (peak 51)Nov 7: AQI 39 (peak 52)Nov 8: AQI 44 (peak 55)Nov 9: AQI 50 (peak 65)Nov 10: AQI 34 (peak 53)Nov 11: AQI 38 (peak 49)
Nov 5Nov 11

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

Tree cover detail

Tree cover in Novo Hamburgo: Healthy tree cover

31.4% tree cover against a 30% healthy-neighborhood target, across 12.57 km².

Target reached

Trees in this area

98,646

Target trees

98,646

More trees needed

0

CO₂ if planted / yr

0 kg

Deforestation · 2001–2025

How much forest has Novo Hamburgo lost?

Since 2001, the area within 10 km of Novo Hamburgo has lost about 3,100 hectares of forest (about 4,300 football pitches): 20% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 1,280 hectares (41%) was deforestation: forest cleared for good for farms, mines or towns.

Satellite image of the area around Novo Hamburgo, April 2017

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

Forest lost since 2001
3,100 haabout 4,300 football pitches
Share of its forest
20%of what there was in 2000
Cleared for good
1,280 hadeforestation: turned into farms, mines or towns

Forest loss is slowing down: about 86 hectares a year in 2021–2025, down from 159 hectares a year in 2016–2020. The worst year was 2014, when about 252 hectares of forest were lost.

Forest lost each year around Novo Hamburgo, 2001–2025

Hectares of forest lost each year

Forest lost each year around Novo Hamburgo, 2001–2025. Use the left and right arrow keys to read each year.252

Show the figures as a table
Forest lost each year around Novo Hamburgo, 2001–2025
YearCleared for goodCan grow backTotal
200149 ha61 ha110 ha
200239 ha59 ha99 ha
200324 ha58 ha82 ha
200443 ha70 ha113 ha
200578 ha52 ha130 ha
200653 ha22 ha75 ha
200752 ha26 ha79 ha
200853 ha54 ha107 ha
200959 ha34 ha93 ha
201057 ha29 ha86 ha
201129 ha49 ha78 ha
201266 ha169 ha235 ha
201335 ha128 ha162 ha
201466 ha186 ha252 ha
201572 ha97 ha169 ha
201692 ha93 ha185 ha
201774 ha138 ha212 ha
201827 ha92 ha119 ha
201930 ha92 ha122 ha
202062 ha97 ha159 ha
202137 ha42 ha79 ha
202232 ha47 ha79 ha
202337 ha39 ha76 ha
202439 ha38 ha78 ha
202570 ha49 ha119 ha

What is causing deforestation around Novo Hamburgo?

  • Loggingcan grow back58% · 1,800 ha
  • Towns and roadscleared for good26% · 792 ha
  • Farms, pasture and plantationscleared for good16% · 484 ha

Also: storms, floods and other natural causes, 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
12,900 ha
Forest in 2020
12,000 ha
Overall change
−934 haless forest than in 2000

Comparing satellite maps from 2000 and 2020, the forest around Novo Hamburgo shrank from about 12,900 hectares to 12,000 hectares, a net loss of about 934 hectares (−7.2%). New forest grew on about 708 hectares, but 1,640 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 Novo Hamburgo

Same 2 km radius, same index — so they compare directly.

  • Canoas

    Brazil

    27.1 km
    Tree cover
    20%
    Air quality
    49
  • Gravataí

    Brazil

    32.2 km
    Tree cover
    42%
    Air quality
    42
  • Alvorada

    Brazil

    36.2 km
    Tree cover
    22%
    Air quality
    56
  • Porto Alegre

    Brazil

    40.6 km
    Tree cover
    22%
    Air quality
    44
  • Viamão

    Brazil

    46.0 km
    Tree cover
    58%
    Air quality
    38
  • Caxias do Sul

    Brazil

    56.9 km
    Tree cover
    18%
    Air quality
    25

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Novo Hamburgo air quality (AQI) and tree cover — measured by Airleaf
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Frequently asked

Questions about Novo Hamburgo

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

The latest reading for Novo Hamburgo shows an AQI of 28 (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 Novo Hamburgo today?

At AQI 28 (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 Novo Hamburgo been like this week?

Over the last 7 days, the CAMS air-quality model put Novo Hamburgo's daily AQI at 39 on average, from 30 on Nov 6 to an hourly peak of 65 on Nov 9. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.

How much forest has the area around Novo Hamburgo lost since 2001?

Since 2001, the area within 10 km of Novo Hamburgo has lost about 3,100 hectares of forest (about 4,300 football pitches): 20% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 1,280 hectares (41%) was deforestation: forest cleared for good for farms, mines or towns. Forest loss is slowing down: about 86 hectares a year in 2021–2025, down from 159 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Novo Hamburgo shrank from about 12,900 hectares to 12,000 hectares, a net loss of about 934 hectares (−7.2%). New forest grew on about 708 hectares, but 1,640 hectares were lost.

What is the tree count in Novo Hamburgo?

Novo Hamburgo has an estimated 98,646 trees across the 12.57 km² measured — 31.4% tree cover, already past the 30% tree-cover target set for this area.

How many more trees does Novo Hamburgo need?

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

How are Novo Hamburgo'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 Guarani; the tree count is an estimate derived from that cover.

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