Frequently asked questions
What is pollen?
Pollen is a fine powder produced by plants for reproduction. Some people develop an allergic response (pollinosis) when inhaling certain types of pollen, causing symptoms such as sneezing, itchy eyes and nasal congestion.
Where does the data come from?
Data comes from the Palynological Network of the Community of Madrid (Red Palinocam), which operates 11 pollen sampling stations distributed across the region. Samples are analysed by optical microscopy in the laboratory.
How often is data updated?
During the peak pollination season (January to June), data is updated daily. The rest of the year, updates are weekly.
What do the levels (low, medium, high, very high) mean?
Each pollen type has specific thresholds measured in grains per cubic metre of air (grains/m³). For example, for grasses: low is below 25, medium 25–50, high 50–100 and very high above 100 grains/m³. Thresholds vary by pollen type.
Why is data missing for some stations?
Measurements depend on manual laboratory analysis, so there may be delays. Also, some stations may be temporarily out of service for maintenance. The Leganés station (LEGA) has no data in recent measurements.
Can I use the data from this website?
Original data belongs to the Community of Madrid and is published under CC-BY 4.0 license. You can use it freely as long as you cite the source: "Community of Madrid — Red Palinocam".
Does this website replace medical advice?
No. PolenMadrid is an informational tool. If you experience allergy symptoms, always consult your doctor or allergist. Pollen levels are only an indicator; allergic reactions depend on each individual.