Alcalá de Henares — March 2026

Main only
3,481 Mulberry — day 24
2,876 London Plane — day 25
2,277 London Plane — day 26
30 Days measured
Daily pollen level evolution
Day Cypress/Yew London Plane Grasses Plantain Olive Birch Privet Alder Maple Mugwort Chestnut Composites Hazel Heather Eucalyptus Ash Mulberry Elm Pine Poplar Goosefoot/Amaranth Oak Sorrel Willow Nettle Other Unidentified
1 1,191 (Very high) 0 (Low) 1 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 0 (Low) 0 (Low) 0 (Low) 2 (Low) 0 (Low) 0 (Low) 2 (Low) 0 (Low) 13 (Low) 0 (Low) 157 (Very high) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 15 (Medium) 1 2
2 1,158 (Very high) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 1 (Low) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 0 (Low) 0 (Low) 3 (Low) 0 (Low) 24 (Medium) 2 (Low) 209 (Very high) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 11 (Low) 1 2
3 1,099 (Very high) 0 (Low) 1 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 2 (Low) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 0 (Low) 0 (Low) 4 (Low) 0 (Low) 18 (Medium) 1 (Low) 212 (Very high) 1 (Low) 0 (Low) 0 (Low) 0 (Low) 11 (Low) 1 1
4 1,281 (Very high) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 2 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 2 (Low) 0 (Low) 8 (Low) 0 (Low) 214 (Very high) 1 (Low) 0 (Low) 0 (Low) 1 (Low) 18 (Medium) 0 1
5 436 (Very high) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 2 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 3 (Low) 0 (Low) 7 (Low) 1 (Low) 120 (Very high) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 12 (Low) 0 0
6 1,056 (Very high) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 2 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 11 (Low) 0 (Low) 60 (High) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 1 (Low) 1 2
7 53 (Medium) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 2 (Low) 0 (Low) 15 (Medium) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 0 1
8 51 (Medium) 0 (Low) 1 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 4 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 0 (Low) 21 (Medium) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 17 (Medium) 0 0
9 208 (Very high) 0 (Low) 1 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 6 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 4 (Low) 2 (Low) 19 (Medium) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 2 (Low) 0 1
10 36 (Medium) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 1 (Low) 9 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 7 (Low) 1 0
11 119 (High) 0 (Low) 1 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 1 (Low) 1 (Low) 0 (Low) 26 (Medium) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 25 (Medium) 0 1
12 526 (Very high) 0 (Low) 1 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 4 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 5 (Low) 0 (Low) 1 (Low) 60 (High) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 41 (Medium) 2 1
13 437 (Very high) 0 (Low) 12 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 16 (Medium) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 76 (High) 2 (Low) 0 (Low) 114 (Very high) 0 (Low) 0 (Low) 1 (Low) 1 (Low) 37 (Medium) 3 2
14 341 (Very high) 1 (Low) 5 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 35 (Medium) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 33 (Medium) 3 (Low) 0 (Low) 72 (High) 0 (Low) 0 (Low) 0 (Low) 2 (Low) 33 (Medium) 6 5
15 70 (Medium) 1 (Low) 1 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 25 (Medium) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 5 (Low) 1 (Low) 0 (Low) 42 (Medium) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 27 (Medium) 1 4
16 32 (Medium) 24 (Low) 1 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 3 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 143 (Very high) 1 (Low) 1 (Low) 84 (High) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 43 (Medium) 1 4
17 57 (Medium) 130 (High) 1 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 12 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 1,521 (Very high) 0 (Low) 1 (Low) 75 (High) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 8 (Low) 3 2
18 84 (Medium) 527 (Very high) 4 (Low) 0 (Low) 0 (Low) 1 (Low) 0 (Low) 0 (Low) 39 (Medium) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 1,076 (Very high) 0 (Low) 4 (Low) 73 (High) 0 (Low) 1 (Low) 0 (Low) 2 (Low) 53 (High) 5 1
19 74 (Medium) 621 (Very high) 3 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 58 (High) 0 (Low) 0 (Low) 1 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 1,322 (Very high) 0 (Low) 5 (Low) 72 (High) 1 (Low) 4 (Low) 0 (Low) 1 (Low) 53 (High) 8 5
20 37 (Medium) 454 (Very high) 0 (Low) 1 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 8 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 362 (Very high) 0 (Low) 3 (Low) 37 (Medium) 1 (Low) 1 (Low) 0 (Low) 0 (Low) 4 (Low) 1 2
21 11 (Low) 134 (High) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 0 (Low) 0 (Low) 1 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 693 (Very high) 1 (Low) 1 (Low) 15 (Medium) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 9 (Low) 1 0
22 6 (Low) 975 (Very high) 1 (Low) 0 (Low) 0 (Low) 2 (Low) 0 (Low) 0 (Low) 14 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 0 (Low) 1,362 (Very high) 0 (Low) 7 (Low) 32 (Medium) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 35 (Medium) 1 3
23 — — — — — — — — — — — — — — — — — — — — — — — — — — —
24 34 (Medium) 759 (Very high) 1 (Low) 1 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 10 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 3,481 (Very high) 2 (Low) 24 (Medium) 24 (Medium) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 14 (Low) 4 5
25 35 (Medium) 2,876 (Very high) 3 (Low) 1 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 9 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 1,105 (Very high) 0 (Low) 24 (Medium) 64 (High) 0 (Low) 0 (Low) 0 (Low) 4 (Low) 7 (Low) 3 6
26 106 (High) 2,277 (Very high) 7 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 4 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 270 (Very high) 1 (Low) 22 (Medium) 78 (High) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 11 (Low) 3 7
27 139 (High) 1,361 (Very high) 4 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 2 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 1 (Low) 228 (Very high) 2 (Low) 14 (Low) 56 (High) 0 (Low) 0 (Low) 0 (Low) 2 (Low) 6 (Low) 5 4
28 54 (Medium) 914 (Very high) 1 (Low) 0 (Low) 0 (Low) 2 (Low) 0 (Low) 0 (Low) 2 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 207 (Very high) 1 (Low) 18 (Medium) 44 (Medium) 0 (Low) 1 (Low) 0 (Low) 2 (Low) 13 (Low) 2 4
29 85 (Medium) 936 (Very high) 4 (Low) 0 (Low) 0 (Low) 2 (Low) 0 (Low) 0 (Low) 6 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 0 (Low) 1 (Low) 170 (Very high) 1 (Low) 15 (Medium) 37 (Medium) 0 (Low) 1 (Low) 0 (Low) 5 (Low) 18 (Medium) 5 8
30 16 (Low) 670 (Very high) 1 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 1 (Low) 2 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 206 (Very high) 0 (Low) 4 (Low) 19 (Medium) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 25 (Medium) 4 2
31 20 (Low) 777 (Very high) 1 (Low) 0 (Low) 0 (Low) 2 (Low) 0 (Low) 0 (Low) 3 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 0 (Low) 315 (Very high) 1 (Low) 13 (Low) 57 (High) 0 (Low) 2 (Low) 0 (Low) 1 (Low) 30 (Medium) 5 8