Alcalá de Henares — March 2026

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2,876 London Plane — day 25
2,277 London Plane — day 26
1,361 London Plane — day 27
30 Days measured
Daily pollen level evolution
Day Cypress/Yew London Plane Grasses Plantain Olive
1 1,191 (Very high) 0 (Low) 1 (Low) 0 (Low) 0 (Low)
2 1,158 (Very high) 0 (Low) 0 (Low) 0 (Low) 0 (Low)
3 1,099 (Very high) 0 (Low) 1 (Low) 0 (Low) 0 (Low)
4 1,281 (Very high) 0 (Low) 0 (Low) 0 (Low) 0 (Low)
5 436 (Very high) 0 (Low) 0 (Low) 0 (Low) 0 (Low)
6 1,056 (Very high) 0 (Low) 0 (Low) 0 (Low) 0 (Low)
7 53 (Medium) 0 (Low) 0 (Low) 0 (Low) 0 (Low)
8 51 (Medium) 0 (Low) 1 (Low) 0 (Low) 0 (Low)
9 208 (Very high) 0 (Low) 1 (Low) 0 (Low) 0 (Low)
10 36 (Medium) 0 (Low) 0 (Low) 0 (Low) 0 (Low)
11 119 (High) 0 (Low) 1 (Low) 0 (Low) 0 (Low)
12 526 (Very high) 0 (Low) 1 (Low) 0 (Low) 0 (Low)
13 437 (Very high) 0 (Low) 12 (Low) 0 (Low) 0 (Low)
14 341 (Very high) 1 (Low) 5 (Low) 0 (Low) 0 (Low)
15 70 (Medium) 1 (Low) 1 (Low) 0 (Low) 0 (Low)
16 32 (Medium) 24 (Low) 1 (Low) 0 (Low) 0 (Low)
17 57 (Medium) 130 (High) 1 (Low) 0 (Low) 0 (Low)
18 84 (Medium) 527 (Very high) 4 (Low) 0 (Low) 0 (Low)
19 74 (Medium) 621 (Very high) 3 (Low) 0 (Low) 0 (Low)
20 37 (Medium) 454 (Very high) 0 (Low) 1 (Low) 0 (Low)
21 11 (Low) 134 (High) 0 (Low) 0 (Low) 0 (Low)
22 6 (Low) 975 (Very high) 1 (Low) 0 (Low) 0 (Low)
23 — — — — —
24 34 (Medium) 759 (Very high) 1 (Low) 1 (Low) 0 (Low)
25 35 (Medium) 2,876 (Very high) 3 (Low) 1 (Low) 0 (Low)
26 106 (High) 2,277 (Very high) 7 (Low) 0 (Low) 0 (Low)
27 139 (High) 1,361 (Very high) 4 (Low) 0 (Low) 0 (Low)
28 54 (Medium) 914 (Very high) 1 (Low) 0 (Low) 0 (Low)
29 85 (Medium) 936 (Very high) 4 (Low) 0 (Low) 0 (Low)
30 16 (Low) 670 (Very high) 1 (Low) 0 (Low) 0 (Low)
31 20 (Low) 777 (Very high) 1 (Low) 0 (Low) 0 (Low)