Air quality comparison · Morocco, 293 km apart
Casablanca vs Tangier Air quality index (AQI) today
Tangier has cleaner air than Casablanca right now: AQI 46 (Good) against 51 (Moderate).
That puts them in different EPA bands, so the health advice differs today. Over the past 6 days, on modeled daily averages, Tangier averaged AQI 37 against 52, and it was the cleaner of the two on 6 of those days. Tangier has lost more forest since 2001. Casablanca has more tree cover.
Morocco
AQI 51
Moderate
Cleaner right now
- PM2.5
- 10.6 µg/m³
- Main pollutant
- PM2.5
- Source
- Model estimate
- Reading
- Nov 10, 20:00 local
Morocco
AQI 46
Good
Cleaner right now
- PM2.5
- 8.7 µg/m³
- Main pollutant
- PM2.5
- Source
- Model estimate
- Reading
- Nov 11, 12:00 local
Updated . Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf.
Casablanca51Tangier46
Head to head
Casablanca vs Tangier at a glance
Tangier is ahead on 4 of 6 measures, and Casablanca on 2. The better figure in each row is marked.
| Casablanca | Tangier | |
|---|---|---|
| Air quality nowUS AQI. Lower is better. | 51 | 46 (better) |
| PM2.5Fine particles, µg/m³. | 10.6 | 8.7 (better) |
| Past week's averageUS AQI, 6 days. | 52 | 37 (better) |
| Forest lost since 2001Within 10 km of the center. | 8 ha (better) | 610 ha |
| Tree coverWithin 2 km of the center. | 4.1% (better) | 3.3% |
| Trees still neededTo reach a healthy canopy. | 80.1K | 77.3K (better) |
Air quality today
What is the air like in Casablanca and Tangier right now?
Tangier has cleaner air than Casablanca right now: AQI 46 (Good) against 51 (Moderate). PM2.5 is setting the index in both.
Both readings are model estimates, with no ground station close enough to either.
CasablancaTangier
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).
Casablanca: Model estimate · no ground station nearby. Data: Open-Meteo / CAMS, US EPA index.
Tangier: Estimate · model corrected with 6 station cities within 185 km, e.g. Algeciras and Gibraltar. Data: Open-Meteo / CAMS, corrected with 6 ground-station cities within 185 km, US EPA index.
The past week
Which had cleaner air over the past 6 days?
Over the past 6 days, on modeled daily averages, Tangier averaged AQI 37 against 52, 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
- Casablanca0Tangier6
- Average AQI
- Casablanca52Tangier37
- Worst day, AQI
- Casablanca72Tangier41
The daily numbers (6 days)
| Day | Casablanca | Tangier |
|---|---|---|
| Nov 5 | 57 | 33 |
| Nov 6 | 62 | 41 |
| Nov 7 | 72 | 40 |
| Nov 8 | 46 | 41 |
| Nov 9 | 35 | 33 |
| Nov 10 | 37 | 31 |
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 Casablanca and Tangier today?
Casablanca (AQI 51, Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Tangier (AQI 46, Good): Air quality is satisfactory for everyone.
Exercise outdoors
- Casablanca
- Fine for most people; unusually sensitive people should take long or hard exercise easier.
- Tangier
- A good day to be active outside.
Windows
- Casablanca
- Fine to open; close them if you are sensitive to pollution.
- Tangier
- Open them to air the house.
Masks
- Casablanca
- Not needed for most people.
- Tangier
- Not needed.
Air purifier
- Casablanca
- Worth running if you are sensitive.
- Tangier
- Not needed.
Against everywhere else
How do Casablanca and Tangier compare with the rest of the world?
Right now Casablanca's air is cleaner than 61% of the 5,420 places Airleaf tracks, and Tangier's is cleaner than 65%. Within Morocco, that is 39% and 42% of its 37 measured places.
Cleaner air than…
- Casablanca
- Beats 61%
- Tangier
- Beats 65%
More tree cover than…
- Casablanca
- Beats 8%
- 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, Casablanca or Tangier?
Tangier has lost more: about 610 ha of forest within 10 km of its center from 2001 to 2025, against 8 ha around Casablanca. 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: 2017, with 2 ha lost.
Worst year: 2016, with 79 ha lost.
| Casablanca | Tangier | |
|---|---|---|
| Forest lost since 2001Cleared, burned or logged. | 8 ha (better) | 610 ha |
| Cleared for goodTurned into farms, mines or towns. | 7 ha (better) | 325 ha |
| Recent trend2021–2025 against the five years before. | Too little to call | Slowing down |
| Main known cause | Towns and roads (76%) | 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.
Casablanca
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, Casablanca or Tangier?
Casablanca has more tree cover: 4.1% of the land within 2 km of its center against 3.3% around Tangier, or about 12,687 trees against 9,559.
The dark mark is each place's canopy target: 30% of the land, raised where air quality is poor.
| Casablanca | Tangier | |
|---|---|---|
| Trees standingEstimated from the canopy area. | 12.7K (better) | 9.6K |
| Trees still neededTo reach the target. Fewer is better. | 80.1K | 77.3K (better) |
| CO₂ absorbed each yearBy the trees already standing. | 279K 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
Casablanca vs Tangier: your questions answered
Is Tangier cleaner than Casablanca?
On air quality, yes, right now: Tangier reads AQI 46 against 51, a gap of 5 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, Tangier averaged AQI 37 against 52, and it was the cleaner of the two on 6 of those days.
Is it safe to exercise outdoors in Casablanca and Tangier today?
In Casablanca, at AQI 51: Unusually sensitive people should consider limiting long outdoor exertion. In Tangier, at AQI 46: Air quality is satisfactory for everyone.
Which has lost more forest, Casablanca or Tangier?
Tangier has lost more: about 610 ha of forest within 10 km of its center from 2001 to 2025, against 8 ha around Casablanca. 325 ha of that was cleared for good, for farms, mines or towns.
Which has more trees, Casablanca or Tangier?
Casablanca has more tree cover: 4.1% of the land within 2 km of its center against 3.3% around Tangier, or about 12,687 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 Casablanca and Tangier need?
Casablanca needs about 80,147 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 Casablanca 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 Casablanca 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 14, 2026 and Sep 17, 2026), and the forest figures are published yearly.
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