Collado Villalba — May 2026

362 Oak — day 4

249 Oak — day 10

116 Oak — day 20

26 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	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
2	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
3	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
4	0 (Low)	0 (Low)	13 (Low)	2 (Low)	8 (Low)	0 (Low)	0 (Low)	0 (Low)	35 (Medium)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	19 (Medium)	0 (Low)	1 (Low)	362 (Very high)	1 (Low)	0 (Low)	0 (Low)	30	1
5	1 (Low)	0 (Low)	6 (Low)	2 (Low)	5 (Low)	0 (Low)	0 (Low)	0 (Low)	8 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	1 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	20 (Medium)	0 (Low)	2 (Low)	95 (High)	0 (Low)	0 (Low)	0 (Low)	5	0
6	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
7	0 (Low)	0 (Low)	8 (Low)	3 (Low)	14 (Low)	0 (Low)	0 (Low)	0 (Low)	9 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	2 (Low)	0 (Low)	0 (Low)	89 (High)	1 (Low)	0 (Low)	0 (Low)	18	0
8	0 (Low)	0 (Low)	30 (Medium)	1 (Low)	63 (Medium)	0 (Low)	0 (Low)	0 (Low)	2 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	2 (Low)	0 (Low)	0 (Low)	50 (High)	0 (Low)	0 (Low)	0 (Low)	28	0
9	0 (Low)	0 (Low)	8 (Low)	0 (Low)	28 (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)	0 (Low)	2 (Low)	0 (Low)	0 (Low)	32 (Medium)	0 (Low)	0 (Low)	0 (Low)	10	1
10	0 (Low)	0 (Low)	7 (Low)	1 (Low)	17 (Low)	0 (Low)	0 (Low)	0 (Low)	8 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	40 (Medium)	0 (Low)	0 (Low)	249 (Very high)	0 (Low)	0 (Low)	0 (Low)	22	0
11	1 (Low)	0 (Low)	13 (Low)	1 (Low)	6 (Low)	0 (Low)	0 (Low)	0 (Low)	3 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	14 (Low)	0 (Low)	0 (Low)	60 (High)	1 (Low)	0 (Low)	0 (Low)	23	0
12	0 (Low)	0 (Low)	20 (Low)	2 (Low)	7 (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)	0 (Low)	23 (Medium)	0 (Low)	0 (Low)	92 (High)	0 (Low)	0 (Low)	0 (Low)	14	0
13	0 (Low)	0 (Low)	9 (Low)	1 (Low)	2 (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)	0 (Low)	3 (Low)	0 (Low)	0 (Low)	13 (Low)	0 (Low)	0 (Low)	1 (Low)	15	0
14	1 (Low)	0 (Low)	15 (Low)	1 (Low)	2 (Low)	0 (Low)	0 (Low)	0 (Low)	11 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	37 (Medium)	0 (Low)	0 (Low)	98 (High)	1 (Low)	0 (Low)	0 (Low)	4	0
15	0 (Low)	0 (Low)	10 (Low)	3 (Low)	1 (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)	0 (Low)	10 (Low)	0 (Low)	0 (Low)	20 (Medium)	0 (Low)	0 (Low)	0 (Low)	1	0
16	0 (Low)	0 (Low)	5 (Low)	3 (Low)	1 (Low)	0 (Low)	0 (Low)	0 (Low)	3 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	18 (Medium)	0 (Low)	0 (Low)	30 (Medium)	1 (Low)	0 (Low)	0 (Low)	3	0
17	1 (Low)	0 (Low)	17 (Low)	12 (Low)	1 (Low)	0 (Low)	0 (Low)	0 (Low)	3 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	27 (Medium)	0 (Low)	0 (Low)	56 (High)	1 (Low)	0 (Low)	0 (Low)	11	1
18	0 (Low)	0 (Low)	13 (Low)	1 (Low)	3 (Low)	0 (Low)	0 (Low)	0 (Low)	4 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	8 (Low)	0 (Low)	0 (Low)	18 (Medium)	3 (Low)	0 (Low)	1 (Low)	5	0
19	2 (Low)	0 (Low)	56 (Medium)	6 (Low)	10 (Low)	0 (Low)	0 (Low)	0 (Low)	8 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	24 (Medium)	0 (Low)	0 (Low)	80 (High)	7 (Low)	0 (Low)	1 (Low)	22	3
20	2 (Low)	0 (Low)	53 (Medium)	13 (Low)	6 (Low)	0 (Low)	6 (Low)	0 (Low)	10 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	11 (Low)	0 (Low)	0 (Low)	116 (Very high)	3 (Low)	0 (Low)	0 (Low)	42	2
21	2 (Low)	0 (Low)	57 (Medium)	29 (Medium)	31 (Low)	1 (Low)	5 (Low)	0 (Low)	5 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	1 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	18 (Medium)	0 (Low)	2 (Low)	56 (High)	5 (Low)	1 (Low)	3 (Low)	65	4
22	4 (Low)	0 (Low)	19 (Low)	8 (Low)	17 (Low)	0 (Low)	5 (Low)	0 (Low)	5 (Low)	0 (Low)	0 (Low)	1 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	18 (Medium)	0 (Low)	0 (Low)	23 (Medium)	0 (Low)	0 (Low)	1 (Low)	13	1
23	1 (Low)	0 (Low)	40 (Medium)	19 (Low)	12 (Low)	0 (Low)	4 (Low)	0 (Low)	5 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	11 (Low)	0 (Low)	0 (Low)	38 (Medium)	3 (Low)	0 (Low)	1 (Low)	13	0
24	5 (Low)	0 (Low)	58 (Medium)	31 (Medium)	23 (Low)	0 (Low)	14 (Low)	0 (Low)	8 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	29 (Medium)	0 (Low)	1 (Low)	54 (High)	2 (Low)	0 (Low)	2 (Low)	18	0
25	3 (Low)	0 (Low)	65 (Medium)	29 (Medium)	30 (Low)	1 (Low)	18 (Medium)	0 (Low)	4 (Low)	0 (Low)	1 (Low)	1 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	36 (Medium)	0 (Low)	0 (Low)	43 (Medium)	1 (Low)	0 (Low)	2 (Low)	19	4
26	1 (Low)	0 (Low)	31 (Medium)	7 (Low)	8 (Low)	0 (Low)	12 (Low)	0 (Low)	2 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	15 (Medium)	0 (Low)	1 (Low)	8 (Low)	1 (Low)	0 (Low)	1 (Low)	7	1
27	—	—	—	17 (Low)	14 (Low)	0 (Low)	12 (Low)	0 (Low)	6 (Low)	0 (Low)	—	1 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	41 (Medium)	0 (Low)	—	49 (Medium)	6 (Low)	0 (Low)	1 (Low)	6	4
28	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
29	—	—	—	11 (Low)	8 (Low)	0 (Low)	3 (Low)	0 (Low)	4 (Low)	0 (Low)	—	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	28 (Medium)	0 (Low)	—	27 (Medium)	2 (Low)	0 (Low)	2 (Low)	9	2
30	—	—	—	19 (Low)	19 (Low)	0 (Low)	5 (Low)	0 (Low)	10 (Low)	0 (Low)	—	1 (Low)	0 (Low)	1 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	115 (Very high)	0 (Low)	—	44 (Medium)	7 (Low)	0 (Low)	2 (Low)	12	2
31	—	—	—	19 (Low)	17 (Low)	0 (Low)	1 (Low)	0 (Low)	1 (Low)	0 (Low)	—	0 (Low)	0 (Low)	1 (Low)	0 (Low)	0 (Low)	0 (Low)	0 (Low)	56 (High)	0 (Low)	—	24 (Medium)	9 (Low)	0 (Low)	5 (Low)	9	1