City report · Umbria, Italy
Terni Air quality today
Air quality in Terni currently reads AQI 23 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 23
Good
- PM2.5, fine particles (µg/m³)
- 3.8
- tree cover
- 36.4%
- trees in this area
- 114K
- more trees needed
- 0
Measured across a 2 km radius around 05100 Terni, Province of Terni, Italy (12.57 km²), from a satellite image of Sep 26, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Terni · AQI 23 (Good)
Terni's tree count comes to 114,354 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 Terni today: AQI 23, Good
Main pollutant: PM2.5 · Observed Nov 11, 05:00 local time via Open-Meteo / CAMS, corrected with 4 ground-station cities within 185 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 4 station cities within 185 km, e.g. Vatican City and Rome
Health signal
Air quality is satisfactory for everyone.
PM2.5
3.8
PM10
8.3
NO₂
2.7
O₃
53.0
SO₂
0.3
CO
121.0
- 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 Terni's daily AQI at 49 on average, from 37 on Nov 10 to an hourly peak of 71 on Nov 5.
Where Terni stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Terni: Healthy tree cover
36.4% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
114,354
Target trees
114,354
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Terni lost?
Since 2001, the area within 10 km of Terni has lost about 1,030 hectares of forest (about 1,400 football pitches): 8.8% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 21 hectares (2.1%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from August 2017 of a 5 × 5 km area about 7 km southeast of the city center.
- Forest lost since 2001
- 1,030 haabout 1,400 football pitches
- Share of its forest
- 8.8%of what there was in 2000
- Cleared for good
- 21 hadeforestation: turned into farms, mines or towns
Forest loss has stayed about the same: about 57 hectares a year in 2021–2025, against 53 hectares a year in 2016–2020. The worst year was 2012, when about 143 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 | 2 ha | 3 ha | 5 ha |
| 2002 | 3 ha | 5 ha | 9 ha |
| 2003 | under 1 ha | 5 ha | 5 ha |
| 2004 | 1 ha | 17 ha | 18 ha |
| 2005 | under 1 ha | 11 ha | 11 ha |
| 2006 | under 1 ha | 11 ha | 12 ha |
| 2007 | under 1 ha | 4 ha | 5 ha |
| 2008 | 2 ha | 14 ha | 16 ha |
| 2009 | under 1 ha | 25 ha | 26 ha |
| 2010 | 1 ha | 24 ha | 25 ha |
| 2011 | under 1 ha | 21 ha | 21 ha |
| 2012 | under 1 ha | 142 ha | 143 ha |
| 2013 | under 1 ha | 89 ha | 89 ha |
| 2014 | under 1 ha | 39 ha | 40 ha |
| 2015 | 1 ha | 53 ha | 54 ha |
| 2016 | under 1 ha | 46 ha | 47 ha |
| 2017 | under 1 ha | 38 ha | 38 ha |
| 2018 | under 1 ha | 68 ha | 68 ha |
| 2019 | under 1 ha | 62 ha | 62 ha |
| 2020 | under 1 ha | 51 ha | 52 ha |
| 2021 | 2 ha | 49 ha | 51 ha |
| 2022 | under 1 ha | 47 ha | 47 ha |
| 2023 | 1 ha | 86 ha | 87 ha |
| 2024 | under 1 ha | 54 ha | 54 ha |
| 2025 | 1 ha | 45 ha | 46 ha |
What is causing deforestation around Terni?
- Loggingcan grow back86% · 880 ha
- Wildfirescan grow back12% · 119 ha
- Towns and roadscleared for good1.1% · 12 ha
Also: farms, pasture and plantations, 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
- 13,600 ha
- Forest in 2020
- 13,500 ha
- Overall change
- −56 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Terni stayed about the same size, at about 13,500 hectares: new forest grew on about 119 hectares, and about 175 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 Terni
Same 2 km radius, same index — so they compare directly.
- Perugia64.5 km
Italy
- Tree cover
- 62%
- Air quality
- 18
- Vatican City75.1 km
Vatican
- Tree cover
- 29%
- Air quality
- 24
- Rome75.4 km
Italy
- Tree cover
- 16%
- Air quality
- 24
- 92.6 km
- Tree cover
- 12%
- Air quality
- 16
- Arezzo117.7 km
Italy
- Tree cover
- 30%
- Air quality
- 68
- Pescara128.4 km
Italy
- Tree cover
- 13%
- Air quality
- 26
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Frequently asked
Questions about Terni
What is the air quality (AQI) in Terni right now?
The latest reading for Terni shows an AQI of 23 (Good), observed Nov 11, 05:00 local time via Open-Meteo / CAMS, corrected with 4 ground-station cities within 185 km, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Terni today?
At AQI 23 (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 Terni been like this week?
Over the last 7 days, the CAMS air-quality model put Terni's daily AQI at 49 on average, from 37 on Nov 10 to an hourly peak of 71 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 Terni lost since 2001?
Since 2001, the area within 10 km of Terni has lost about 1,030 hectares of forest (about 1,400 football pitches): 8.8% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 21 hectares (2.1%) was deforestation: forest cleared for good for farms, mines or towns. Forest loss has stayed about the same: about 57 hectares a year in 2021–2025, against 53 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Terni stayed about the same size, at about 13,500 hectares: new forest grew on about 119 hectares, and about 175 hectares were lost.
What is the tree count in Terni?
Terni has an estimated 114,354 trees across the 12.57 km² measured — 36.4% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Terni need?
Terni has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Terni'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 05100 Terni; the tree count is an estimate derived from that cover.
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