Previous Madrid-Ciudad Universitaria — 18 February 1998 Next | Type | Value (grains/m³) | Level |
| Cypress/Yew * | 800 | Very high |
| London Plane * | 0 | Low |
| Grasses * | 29 | 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 | 2 | Low |
| Heather | 0 | Low |
| Eucalyptus | 0 | Low |
| Ash | 10 | Low |
| Mulberry | 0 | Low |
| Elm | 95 | High |
| Pine | 0 | Low |
| Poplar | 35 | Medium |
| Goosefoot/Amaranth | 0 | Low |
| Oak | 1 | Low |
| Sorrel | 18 | Medium |
| Willow | 0 | Low |
| Nettle | 7 | Low |
| Unidentified | 14 | No data |