Air quality comparison · Kenya, 264 km apart
Eldoret vs Nairobi Air quality index (AQI) today
Eldoret has cleaner air than Nairobi right now: AQI 49 (Good) against 96 (Moderate).
That puts them in different EPA bands, so the health advice differs today. But over the past 7 days, on modeled daily averages, Nairobi averaged AQI 46 against 50, and it was the cleaner of the two on 6 of those days. Eldoret has lost more forest since 2001. Nairobi has more tree cover.
Updated . Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf.
Eldoret49Nairobi96
Head to head
Eldoret vs Nairobi at a glance
Nairobi is ahead on 4 of 6 measures, and Eldoret on 2. The better figure in each row is marked.
| Eldoret | Nairobi | |
|---|---|---|
| Air quality nowUS AQI. Lower is better. | 49 (better) | 96 |
| PM2.5Fine particles, µg/m³. | 9.9 (better) | 33.3 |
| Past week's averageUS AQI, 7 days. | 50 | 46 (better) |
| Forest lost since 2001Within 10 km of the center. | 518 ha | 336 ha (better) |
| Tree coverWithin 2 km of the center. | 19.2% | 26.2% (better) |
| Trees still neededTo reach a healthy canopy. | 33.9K | 11.9K (better) |
Air quality today
What is the air like in Eldoret and Nairobi right now?
Eldoret has cleaner air than Nairobi right now: AQI 49 (Good) against 96 (Moderate). PM2.5 is setting the index in both.
Nairobi's PM2.5 is about 2.2× the WHO's 24-hour guideline of 15 µg/m³.
Nairobi is read from a nearby ground station and Eldoret is a model estimate, so the two are not quite like for like.
EldoretNairobi
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).
Eldoret: Model estimate · no ground station nearby. Data: Open-Meteo / CAMS, US EPA index.
Nairobi: Ground station · Kitisuru, 9.2 km away. Data: OpenAQ · AirGradient.
The past week
Which had cleaner air over the past 7 days?
But over the past 7 days, on modeled daily averages, Nairobi averaged AQI 46 against 50, and it was the cleaner of the two on 6 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
- Eldoret1Nairobi6
- Average AQI
- Eldoret50Nairobi46
- Worst day, AQI
- Eldoret58Nairobi56
The daily numbers (7 days)
| Day | Eldoret | Nairobi |
|---|---|---|
| Nov 4 | 58 | 56 |
| Nov 5 | 49 | 41 |
| Nov 6 | 52 | 44 |
| Nov 7 | 53 | 52 |
| Nov 8 | 48 | 42 |
| Nov 9 | 46 | 44 |
| Nov 10 | 43 | 44 |
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 Eldoret and Nairobi today?
Eldoret (AQI 49, Good): Air quality is satisfactory for everyone.
Nairobi (AQI 96, Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Exercise outdoors
- Eldoret
- A good day to be active outside.
- Nairobi
- Fine for most people; unusually sensitive people should take long or hard exercise easier.
Windows
- Eldoret
- Open them to air the house.
- Nairobi
- Fine to open; close them if you are sensitive to pollution.
Masks
- Eldoret
- Not needed.
- Nairobi
- Not needed for most people.
Air purifier
- Eldoret
- Not needed.
- Nairobi
- Worth running if you are sensitive.
Against everywhere else
How do Eldoret and Nairobi compare with the rest of the world?
Right now Eldoret's air is cleaner than 62% of the 5,420 places Airleaf tracks, and Nairobi's is cleaner than 22%. Within Kenya, that is 76% and 20% of its 26 measured places.
Cleaner air than…
- Eldoret
- Beats 62%
- Nairobi
- Beats 22%
More tree cover than…
- Eldoret
- Beats 45%
- Nairobi
- Beats 60%
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.
Deforestation · 2001–2025
Which has lost more forest, Eldoret or Nairobi?
Eldoret has lost more: about 518 ha of forest within 10 km of its center from 2001 to 2025, against 336 ha around Nairobi. 418 ha of that was cleared for good, for farms, mines or towns.
Measured within 10 km of each center, from the yearly satellite maps of forest loss: a wider circle than the one for tree cover, because forest is usually lost at a city's edges.
Worst year: 2002, with 185 ha lost.
Worst year: 2001, with 103 ha lost.
| Eldoret | Nairobi | |
|---|---|---|
| Forest lost since 2001Cleared, burned or logged. | 518 ha | 336 ha (better) |
| Share of its forestOf what it had in 2000. | 45% | 9.2% (better) |
| Cleared for goodTurned into farms, mines or towns. | 418 ha | 307 ha (better) |
| Recent trend2021–2025 against the five years before. | Too little to call | Too little to call |
| Main known cause | Farms, pasture and plantations (50%) | Towns and roads (79%) |
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.
Eldoret
2017: satellite photo from March 2017 of a 5 × 5 km area in the city center.
Nairobi
2017: satellite photo from January 2017 of a 5 × 5 km area about 5 km north of the city center.
Trees
Which has more trees, Eldoret or Nairobi?
Nairobi has more tree cover: 26.2% of the land within 2 km of its center against 19.2% around Eldoret, or about 82,310 trees against 60,319.
The dark mark is each place's canopy target: 30% of the land, raised where air quality is poor.
| Eldoret | Nairobi | |
|---|---|---|
| Trees standingEstimated from the canopy area. | 60.3K | 82.3K (better) |
| Trees still neededTo reach the target. Fewer is better. | 33.9K | 11.9K (better) |
| CO₂ absorbed each yearBy the trees already standing. | 1.3M kg | 1.8M 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
Eldoret vs Nairobi: your questions answered
Is Eldoret cleaner than Nairobi?
On air quality, yes, right now: Eldoret reads AQI 49 against 96, a gap of 47 points on the US EPA index. This is a live reading rather than an annual average, so it can reverse within a day. But over the past 7 days, on modeled daily averages, Nairobi averaged AQI 46 against 50, and it was the cleaner of the two on 6 of those days.
Is it safe to exercise outdoors in Eldoret and Nairobi today?
In Eldoret, at AQI 49: Air quality is satisfactory for everyone. In Nairobi, at AQI 96: Unusually sensitive people should consider limiting long outdoor exertion.
Which has lost more forest, Eldoret or Nairobi?
Eldoret has lost more: about 518 ha of forest within 10 km of its center from 2001 to 2025, against 336 ha around Nairobi. 418 ha of that was cleared for good, for farms, mines or towns.
Which has more trees, Eldoret or Nairobi?
Nairobi has more tree cover: 26.2% of the land within 2 km of its center against 19.2% around Eldoret, or about 82,310 trees against 60,319. Both figures describe the same-sized circle of ground around each center, not the whole municipality.
How many more trees do Eldoret and Nairobi need?
Eldoret needs about 33,929 more to reach its canopy target of 30%, and Nairobi about 11,938 to reach 30%. The target starts at 30% of the land and rises where air quality is poor.
Are Eldoret and Nairobi 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. Nairobi is read from a nearby ground station and Eldoret 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 Eldoret vs Nairobi 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 7, 2026 and Sep 4, 2026), and the forest figures are published yearly.
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