Alcalá de Henares — April 2001

498 London Plane — day 1

292 London Plane — day 2

130 London Plane — day 4

26 Days measured

Daily pollen level evolution
Day	Cypress/Yew	London Plane	Grasses	Plantain	Olive
1	2 (Low)	498 (Very high)	4 (Low)	0 (Low)	0 (Low)
2	5 (Low)	292 (High)	11 (Low)	1 (Low)	0 (Low)
3	2 (Low)	123 (High)	14 (Low)	0 (Low)	0 (Low)
4	1 (Low)	130 (High)	24 (Low)	1 (Low)	0 (Low)
5	1 (Low)	91 (Medium)	16 (Low)	1 (Low)	0 (Low)
6	—	—	—	—	—
7	—	—	—	—	—
8	—	—	—	—	—
9	—	—	—	—	—
10	2 (Low)	73 (Medium)	9 (Low)	1 (Low)	0 (Low)
11	7 (Low)	87 (Medium)	6 (Low)	3 (Low)	0 (Low)
12	2 (Low)	117 (High)	6 (Low)	1 (Low)	0 (Low)
13	7 (Low)	106 (High)	3 (Low)	1 (Low)	0 (Low)
14	3 (Low)	34 (Medium)	4 (Low)	0 (Low)	0 (Low)
15	0 (Low)	4 (Low)	2 (Low)	1 (Low)	0 (Low)
16	0 (Low)	8 (Low)	13 (Low)	6 (Low)	0 (Low)
17	12 (Low)	18 (Low)	8 (Low)	4 (Low)	0 (Low)
18	1 (Low)	3 (Low)	1 (Low)	1 (Low)	0 (Low)
19	1 (Low)	10 (Low)	4 (Low)	2 (Low)	0 (Low)
20	1 (Low)	1 (Low)	3 (Low)	1 (Low)	0 (Low)
21	0 (Low)	4 (Low)	4 (Low)	2 (Low)	0 (Low)
22	1 (Low)	2 (Low)	5 (Low)	6 (Low)	0 (Low)
23	2 (Low)	14 (Low)	12 (Low)	15 (Low)	0 (Low)
24	1 (Low)	11 (Low)	13 (Low)	9 (Low)	2 (Low)
25	0 (Low)	4 (Low)	10 (Low)	9 (Low)	2 (Low)
26	4 (Low)	2 (Low)	4 (Low)	7 (Low)	2 (Low)
27	13 (Low)	7 (Low)	12 (Low)	5 (Low)	9 (Low)
28	44 (Medium)	2 (Low)	9 (Low)	8 (Low)	1 (Low)
29	16 (Low)	2 (Low)	23 (Low)	21 (Medium)	2 (Low)
30	1 (Low)	1 (Low)	2 (Low)	2 (Low)	0 (Low)