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Airleaf

Al Jubayl vs Az̧ Z̧a‘āyin

Tree cover and air quality for both, measured the same way: Sentinel-2 imagery at 10 m detail over a 2 km radius from each city centre, and the live US EPA air quality index. Same radius and same index, so the two numbers compare directly.

Al Jubayl has more tree cover — 0.9% against 0.6%.

Az̧ Z̧a‘āyin has cleaner air right now — AQI 112 against 120.

Tree cover gap
0.3 points
Al Jubayl is ahead.
Air quality gap
8 AQI
Az̧ Z̧a‘āyin is cleaner.
Trees between them
1.3K
Al Jubayl has more standing.

Tree cover

Share of the 2 km radius under canopy.

0.9%

0.6%

Air quality index

US EPA index, live, with its band. Lower is better.

120 · Unhealthy for sensitive groups

112 · Unhealthy for sensitive groups

Trees standing

Estimated from the measured canopy area.

2.8K

1.5K

Trees still needed

To reach the same canopy target. Fewer is better.

107K

85.2K

CO₂ absorbed each year

By the trees already standing.

62.2K kg

32.7K kg

Air quality in detail

What each city is breathing

Concentrations in µg/m³, measured at the same moment as the index above. Lower is better in every row. Both are modelled, with no ground station close enough to either.

PM2.5

Fine particles, the pollutant that usually sets the index.

43.3 µg/m³

39.9 µg/m³

PM10

Coarser particles — dust, pollen, road grit.

76.8 µg/m³

108 µg/m³

Nitrogen dioxide

Mostly traffic and combustion.

10.8 µg/m³

15.5 µg/m³

Ozone

Forms in sunlight; peaks on hot, still afternoons.

108 µg/m³

131 µg/m³

The last week, day by day

A single reading can catch a city on a bad afternoon. The week says whether it was the weather or the place.

Al JubaylAz̧ Z̧a‘āyin· daily US EPA index, last 7 days
010020022 Sept25 Sept28 Sept
Daily air quality index for Al Jubayl and Az̧ Z̧a‘āyin
DayAl JubaylAz̧ Z̧a‘āyin
22 Sept123122
23 Sept151105
24 Sept178136
25 Sept144148
26 Sept126129
27 Sept137101
28 Sept143101

Reading these numbers

What is actually being measured

Tree cover

The share of ground under canopy inside a 2 km radius of each city centre, read from Sentinel-2 satellite imagery at 10 m detail. It is a measurement of that circle, not of the whole municipality — which is exactly what makes the two comparable, since city boundaries are drawn to wildly different rules around the world. Al Jubayl leads here at 0.9%.

Air quality index

The live US EPA index, computed from current pollutant concentrations — ground stations where a city has them nearby, and a model everywhere else. It moves hour to hour, so this is a snapshot rather than a verdict on either place: Al Jubayl reads 120 (unhealthy for sensitive groups) and Az̧ Z̧a‘āyin reads 112 (unhealthy for sensitive groups) right now.

Frequently asked

Al Jubayl and Az̧ Z̧a‘āyin, answered

Which has more trees, Al Jubayl or Az̧ Z̧a‘āyin?

Al Jubayl, with roughly 2,827 trees inside its 2 km radius against 1,485. Tree cover tells a slightly different story from raw count: Al Jubayl has the denser canopy at 0.9%.

Which has better air quality, Al Jubayl or Az̧ Z̧a‘āyin?

Az̧ Z̧a‘āyin right now, at AQI 112 against 120 — a gap of 8 points. This is a live reading rather than an annual average, so it can reverse within a day.

How many more trees does each city need?

Al Jubayl needs about 107,128 more to reach its canopy target, and Az̧ Z̧a‘āyin about 85,160. The target is the same share of ground for both, so the figures are directly comparable.

Are these two measured the same way?

Yes — that is the point of the page. Identical radius, identical satellite source at 10 m detail, and the same US EPA index for air. Nothing here is adjusted for population, city limits or climate, so the numbers describe the same-sized circle of ground in each place.

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