Air quality comparison · Armenia, 89 km apart
Gyumri vs Yerevan Air quality index (AQI) today
Gyumri has cleaner air than Yerevan right now: AQI 46 (Good) against 127 (Unhealthy for sensitive groups).
That puts them in different EPA bands, so the health advice differs today. Over the past 6 days, on modeled daily averages, Gyumri averaged AQI 21 against 29, and it was the cleaner of the two on 4 of those days. Yerevan has more tree cover.
Updated . Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf.
Gyumri46Yerevan127
Head to head
Gyumri vs Yerevan at a glance
Gyumri is ahead on 4 of 5 measures, and Yerevan on 1. The better figure in each row is marked.
| Gyumri | Yerevan | |
|---|---|---|
| Air quality nowUS AQI. Lower is better. | 46 (better) | 127 |
| PM2.5Fine particles, µg/m³. | 6.5 (better) | 46.2 |
| Past week's averageUS AQI, 6 days. | 21 (better) | 29 |
| Tree coverWithin 2 km of the center. | 14.0% | 17.9% (better) |
| Trees still neededTo reach a healthy canopy. | 50.3K (better) | 53.7K |
Air quality today
What is the air like in Gyumri and Yerevan right now?
Gyumri has cleaner air than Yerevan right now: AQI 46 (Good) against 127 (Unhealthy for sensitive groups). PM2.5 is setting the index in both.
Yerevan's PM2.5 is about 3.1× the WHO's 24-hour guideline of 15 µg/m³.
Yerevan is read from a nearby ground station and Gyumri is a model estimate, so the two are not quite like for like.
GyumriYerevan
Concentrations at the same moment as the index above, for the pollutants both places report. Lower is better. The dark marks on the PM2.5 and PM10 rows show the WHO's 24-hour guidelines (15 and 45 µg/m³).
Gyumri: Estimate · model corrected with 4 station cities within 145 km, e.g. Hrazdan and Yerevan. Data: Open-Meteo / CAMS, corrected with 4 ground-station cities within 145 km, US EPA index.
Yerevan: Ground station · 32 Aram street, Yerevan, Armenia, 400 m away · median of 20 stations. Data: OpenAQ · AirGradient, Clarity, Anton Vlasov, Asatryan studio balkon, Tubal Cain.
The past week
Which had cleaner air over the past 6 days?
Over the past 6 days, on modeled daily averages, Gyumri averaged AQI 21 against 29, and it was the cleaner of the two on 4 of those days. A single reading can catch a city on a bad afternoon; the week says whether it was the weather or the place.
- Cleaner days
- Gyumri4Yerevan2
- Average AQI
- Gyumri21Yerevan29
- Worst day, AQI
- Gyumri42Yerevan39
The daily numbers (6 days)
| Day | Gyumri | Yerevan |
|---|---|---|
| Nov 5 | 42 | 39 |
| Nov 6 | 18 | 29 |
| Nov 7 | 18 | 33 |
| Nov 8 | 8 | 25 |
| Nov 9 | 11 | 20 |
| Nov 10 | 27 | 26 |
Daily averages from the CAMS atmospheric model for both places, so the week compares like with like. They can differ from today's reading at the top of the page wherever that comes from a ground station.
What it means today
Is it safe to go outside in Gyumri and Yerevan today?
Gyumri (AQI 46, Good): Air quality is satisfactory for everyone.
Yerevan (AQI 127, Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
Exercise outdoors
- Gyumri
- A good day to be active outside.
- Yerevan
- Children, older adults and people with asthma or heart disease should cut down long or hard exercise.
Windows
- Gyumri
- Open them to air the house.
- Yerevan
- Close them to keep the outside air out.
Masks
- Gyumri
- Not needed.
- Yerevan
- Sensitive groups: an N95 outdoors.
Air purifier
- Gyumri
- Not needed.
- Yerevan
- Run one, especially in bedrooms.
Against everywhere else
How do Gyumri and Yerevan compare with the rest of the world?
Right now Gyumri's air is cleaner than 65% of the 5,420 places Airleaf tracks, and Yerevan's is cleaner than 14%. Within Armenia, that is 75% and 0% of its 5 measured places.
Cleaner air than…
- Gyumri
- Beats 65%
- Yerevan
- Beats 14%
More tree cover than…
- Gyumri
- Beats 32%
- Yerevan
- Beats 41%
Includes model estimates as well as station readings, so it can differ from our most polluted and cleanest air rankings, which use station readings only.
Satellite timelapses
Watch both change, year by year
A clear satellite photo a year of the land around each city. Press play, turn on the forest cleared since the first year, or drag the before and after.
Gyumri
2017: satellite photo from July 2017 of a 5 × 5 km area in the city center.
Yerevan
2018: satellite photo from July 2018 of a 5 × 5 km area in the city center.
Trees
Which has more trees, Gyumri or Yerevan?
Yerevan has more tree cover: 17.9% of the land within 2 km of its center against 14.0% around Gyumri, or about 56,235 trees against 43,982.
The dark mark is each place's canopy target: 30% of the land, raised where air quality is poor.
| Gyumri | Yerevan | |
|---|---|---|
| Trees standingEstimated from the canopy area. | 44.0K | 56.2K (better) |
| Trees still neededTo reach the target. Fewer is better. | 50.3K (better) | 53.7K |
| CO₂ absorbed each yearBy the trees already standing. | 968K kg | 1.2M kg (better) |
Tree cover on the satellite image
The same 2 km radius around each center, with the tree cover the satellite found marked on it.
Reading these numbers
How this comparison is made
Air quality index
The US EPA index, computed from current pollutant concentrations: ground stations where a place has them nearby, and the CAMS atmospheric model everywhere else. It moves hour to hour, so it is a snapshot rather than a verdict on either place. The guideline marks are from the WHO's 2021 air quality guidelines.
Trees and forest
Tree cover is the share of ground under canopy within 2 km of each center, read from Sentinel-2 satellite imagery at 10 m detail. It measures that circle, not the whole municipality, which is what makes the two comparable. Forest loss comes from the University of Maryland's Global Forest Change maps.
More on the method on the About Airleaf page.
Frequently asked
Gyumri vs Yerevan: your questions answered
Is Gyumri cleaner than Yerevan?
On air quality, yes, right now: Gyumri reads AQI 46 against 127, a gap of 81 points on the US EPA index. This is a live reading rather than an annual average, so it can reverse within a day. Over the past 6 days, on modeled daily averages, Gyumri averaged AQI 21 against 29, and it was the cleaner of the two on 4 of those days.
Is it safe to exercise outdoors in Gyumri and Yerevan today?
In Gyumri, at AQI 46: Air quality is satisfactory for everyone. In Yerevan, at AQI 127: Sensitive groups should limit long or intense outdoor activity.
Which has more trees, Gyumri or Yerevan?
Yerevan has more tree cover: 17.9% of the land within 2 km of its center against 14.0% around Gyumri, or about 56,235 trees against 43,982. Both figures describe the same-sized circle of ground around each center, not the whole municipality.
How many more trees do Gyumri and Yerevan need?
Gyumri needs about 50,265 more to reach its canopy target of 30%, and Yerevan about 53,721 to reach 35%. The target starts at 30% of the land and rises where air quality is poor.
Are Gyumri and Yerevan measured the same way?
The method is the same: the US EPA index for air, and Sentinel-2 satellite imagery at 10 m detail over an identical radius for trees. Yerevan is read from a nearby ground station and Gyumri is a model estimate, so the two are not quite like for like. Nothing is adjusted for population, city limits or climate.
How often does the Gyumri vs Yerevan comparison update?
The air readings refresh about once an hour, and each reading's local time is shown at the top of the page. Tree cover comes from the latest clear satellite image of each area (Sep 15, 2026 and Sep 14, 2026), and the forest figures are published yearly.
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