# Differences between air quality forecast on my phone and direct air quality monitoring stations

**URL:** <https://forum.ecmwf.int/t/differences-between-air-quality-forecast-on-my-phone-and-direct-air-quality-monitoring-stations/1345>\
**Category:** CAMS - Datasets and Usage\
**Tags:** cams, cams\_global\_forecast\
**Created:** [14 November 2019 15:05 UTC](https://forum.ecmwf.int/t/differences-between-air-quality-forecast-on-my-phone-and-direct-air-quality-monitoring-stations/1345 "2019-11-14T15:05:45Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Michela](https://forum.ecmwf.int/letter_avatar_proxy/v4/letter/m/898d66/32.png) [@Michela](https://forum.ecmwf.int/u/Michela)\
**Post date:** [14 November 2019 15:05 UTC](https://forum.ecmwf.int/t/differences-between-air-quality-forecast-on-my-phone-and-direct-air-quality-monitoring-stations/1345/1 "2019-11-14T15:05:45Z")

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The Copernicus Atmosphere Monitoring Service explains in the following video the reasons behind the differences between air quality forecast and direct air quality station measurements:

[Why's the air quality forecast on my phone different from direct air quality monitoring stations?](https://www.youtube.com/watch?v=o2qeK4YSrNU&feature=youtu.be)