Polen Madrid

Just what allergy sufferers in Madrid need!

Finally, an app that easily and simply combines pollen levels from different sources with pollution levels.

Find out the pollen and pollution levels around you, filter by the pollens that affect you, view the graph of the last 7 days to see the trend, or simply check the situation in other areas of Madrid.

The official apps don't work very well: maps where you can't click the dot, PDF files that open and are unusable, or errors and buttons that don't work. This app gathers data from two sources: the Community's Open Data service (which has an update delay of two days at best), and the 'Pollen Viewer' on the website, which only shows the previous day's values ​​(sometimes). This delay is because it's a manual process; there's no data on weekends!

By combining both sources, we can present more robust data to understand the situation and trends at a glance.

We give the levels as percentages, where 100% is the result of the maximum threshold plus the average threshold, and the colors are Yellow, Orange, Red, and Purple. Green only appears when there are no significant measurements, because even a small amount of pollen can still cause allergies! All anomalous peak measurements above the usual thresholds will be shown as a high percentage and will be represented by a skull instead of a smiley face.

Data sources used: This application obtains its information from official and public sources of the Spanish State, freely available through open data portals:

- Pollen data: Community of Madrid — Open Data Portal
- Pollen collection stations: https://datos.comunidad.madrid/dataset/32eadfbb-6954-413d-83ed-7ceb77de72a9/resource/1c6f941c-3d5a-45ce-ba61-0f85b58ceab5/download/captadores_polen.json
- Pollen measurements: https://datos.comunidad.madrid/dataset/e608aace-3593-43a3-8c91-02332137fa83/resource/db5e3952-57f5-40f3-bb1d-906eb17aebb1/download/mediciones_polen.json
- Map of pollen sensors: GeoServer idem.madrid.org (WMS service)
- Air quality data: Madrid City Council — Open Data Portal
- Real-time measurements (CSV): https://datos.madrid.es/dataset/212531-0-calidad-aire-tiempo-real/resource/212531-2-calidad-aire-tiempo-real/download/212531-2-calidad-aire-tiempo-real.csv
- Real-time measurements (JSON): https://ciudadesabiertas.madrid.es/dynamicAPI/API/query/calair_tiemporeal_ult.json?pageSize=5000
- Monitoring stations: https://datos.madrid.es/api/3/action/datastore_search?resource_id=212629-0-estaciones-control-aire&limit=100
- Air quality data (alternative source): World Air Quality Index (WAQI) — https://api.waqi.info/feed/here/?token={token}

All these sources are publicly and freely accessible, provided by the relevant authorities through their open data portals.

--- Disclaimer: This application is an independent development and is not associated with, endorsed, certified, or approved by any government entity or public body. It does not represent the Community of Madrid, the Madrid City Council, or any other administration. The data displayed is automatically obtained from official open data sources and is presented for informational purposes. For official and up-to-date information, please consult the websites of the relevant authorities directly. The developer is not responsible for any errors, delays, or inconsistencies in the data obtained from these sources.