Air quality comparison · Morocco, 206 km apart
Fes vs Tangier Air quality index (AQI) today
Tangier has cleaner air than Fes right now: AQI 59 (Moderate) against 82 (Moderate).
Both sit in the same EPA band, so the health advice is the same for each today. Over the past 7 days, on modeled daily averages, Tangier averaged AQI 36 against 47, and it was the cleaner of the two on 7 of those days. Tangier has lost more forest since 2001. Fes has more tree cover.
Updated . Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf.
Fes82Tangier59
Head to head
Fes vs Tangier at a glance
Fes and Tangier are level, each ahead on 3 of 6 measures. The better figure in each row is marked.
| Fes | Tangier | |
|---|---|---|
| Air quality nowUS AQI. Lower is better. | 82 | 59 (better) |
| PM2.5Fine particles, µg/m³. | 23.8 | 14.1 (better) |
| Past week's averageUS AQI, 7 days. | 47 | 36 (better) |
| Forest lost since 2001Within 10 km of the center. | 2 ha (better) | 610 ha |
| Tree coverWithin 2 km of the center. | 8.9% (better) | 3.3% |
| Trees still neededTo reach a healthy canopy. | 66.3K (better) | 77.3K |
Air quality today
What is the air like in Fes and Tangier right now?
Tangier has cleaner air than Fes right now: AQI 59 (Moderate) against 82 (Moderate). PM2.5 is setting the index in both.
Fes's PM2.5 is about 1.6× the WHO's 24-hour guideline of 15 µg/m³.
Both readings are model estimates, with no ground station close enough to either.
FesTangier
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).
Fes: Estimate · model corrected with 3 station cities within 245 km, e.g. Nador and Gibraltar. Data: Open-Meteo / CAMS, corrected with 3 ground-station cities within 245 km, US EPA index.
Tangier: Estimate · model corrected with 5 station cities within 185 km, e.g. Algeciras and Gibraltar. Data: Open-Meteo / CAMS, corrected with 5 ground-station cities within 185 km, US EPA index.
The past week
Which had cleaner air over the past 7 days?
Over the past 7 days, on modeled daily averages, Tangier averaged AQI 36 against 47, and it was the cleaner of the two on 7 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
- Fes0Tangier7
- Average AQI
- Fes47Tangier36
- Worst day, AQI
- Fes54Tangier41
The daily numbers (7 days)
| Day | Fes | Tangier |
|---|---|---|
| Nov 5 | 50 | 33 |
| Nov 6 | 54 | 41 |
| Nov 7 | 54 | 40 |
| Nov 8 | 42 | 41 |
| Nov 9 | 39 | 33 |
| Nov 10 | 39 | 31 |
| Nov 11 | 54 | 30 |
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 Fes and Tangier today?
Unusually sensitive people should consider limiting long outdoor exertion. Both are in the same EPA band today (Moderate), so the advice is the same.
Exercise outdoors
Fine for most people; unusually sensitive people should take long or hard exercise easier.
Windows
Fine to open; close them if you are sensitive to pollution.
Masks
Not needed for most people.
Air purifier
Worth running if you are sensitive.
Against everywhere else
How do Fes and Tangier compare with the rest of the world?
Right now Fes's air is cleaner than 29% of the 5,420 places Airleaf tracks, and Tangier's is cleaner than 48%. Within Morocco, that is 0% and 28% of its 37 measured places.
Cleaner air than…
- Fes
- Beats 29%
- Tangier
- Beats 48%
More tree cover than…
- Fes
- Beats 18%
- Tangier
- Beats 7%
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, Fes or Tangier?
Tangier has lost more: about 610 ha of forest within 10 km of its center from 2001 to 2025, against 2 ha around Fes. 325 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: 2009, with under 1 ha lost.
Worst year: 2016, with 79 ha lost.
| Fes | Tangier | |
|---|---|---|
| Forest lost since 2001Cleared, burned or logged. | 2 ha (better) | 610 ha |
| Cleared for goodTurned into farms, mines or towns. | under 1 ha (better) | 325 ha |
| Recent trend2021–2025 against the five years before. | Too little to call | Slowing down |
| Main known cause | Towns and roads (29%) | Wildfires (45%) |
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.
Fes
2017: satellite photo from August 2017 of a 5 × 5 km area in the city center.
Tangier
2017: satellite photo from July 2017 of a 5 × 5 km area about 7 km east of the city center.
Trees
Which has more trees, Fes or Tangier?
Fes has more tree cover: 8.9% of the land within 2 km of its center against 3.3% around Tangier, or about 27,960 trees against 9,559.
The dark mark is each place's canopy target: 30% of the land, raised where air quality is poor.
| Fes | Tangier | |
|---|---|---|
| Trees standingEstimated from the canopy area. | 28.0K (better) | 9.6K |
| Trees still neededTo reach the target. Fewer is better. | 66.3K (better) | 77.3K |
| CO₂ absorbed each yearBy the trees already standing. | 615K kg (better) | 210K kg |
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
Fes vs Tangier: your questions answered
Is Tangier cleaner than Fes?
On air quality, yes, right now: Tangier reads AQI 59 against 82, a gap of 23 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 7 days, on modeled daily averages, Tangier averaged AQI 36 against 47, and it was the cleaner of the two on 7 of those days.
Is it safe to exercise outdoors in Fes and Tangier today?
The advice is the same for both today. Unusually sensitive people should consider limiting long outdoor exertion. Fes reads AQI 82 and Tangier reads AQI 59.
Which has lost more forest, Fes or Tangier?
Tangier has lost more: about 610 ha of forest within 10 km of its center from 2001 to 2025, against 2 ha around Fes. 325 ha of that was cleared for good, for farms, mines or towns.
Which has more trees, Fes or Tangier?
Fes has more tree cover: 8.9% of the land within 2 km of its center against 3.3% around Tangier, or about 27,960 trees against 9,559. Both figures describe the same-sized circle of ground around each center, not the whole municipality.
How many more trees do Fes and Tangier need?
Fes needs about 66,288 more to reach its canopy target of 30%, and Tangier about 77,338 to reach 30%. The target starts at 30% of the land and rises where air quality is poor.
Are Fes and Tangier 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. Both readings are model estimates, with no ground station close enough to either. Nothing is adjusted for population, city limits or climate.
How often does the Fes vs Tangier 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 19, 2026 and Sep 17, 2026), and the forest figures are published yearly.
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