Previous Madrid-Ciudad Universitaria — 20 February 1998 Next | Type | Value (grains/m³) | Level |
| Cypress/Yew * | 287 | Very high |
| London Plane * | 0 | Low |
| Grasses * | 10 | Low |
| Plantain * | 0 | Low |
| Olive * | 0 | Low |
| Birch | 0 | Low |
| Privet | 0 | Low |
| Alder | 0 | Low |
| Mugwort | 0 | Low |
| Chestnut | 0 | Low |
| Composites | 0 | Low |
| Hazel | 0 | Low |
| Heather | 1 | Low |
| Eucalyptus | 0 | Low |
| Ash | 1 | Low |
| Mulberry | 0 | Low |
| Elm | 22 | Medium |
| Pine | 1 | Low |
| Poplar | 53 | High |
| Goosefoot/Amaranth | 0 | Low |
| Oak | 0 | Low |
| Sorrel | 5 | Low |
| Willow | 0 | Low |
| Nettle | 10 | Low |
| Unidentified | 6 | No data |