Decipher, under discussion with the University of Mainz on how to combine air quality investigations with other health studies, run a first assessment of the Mainz environment which is presented here: https://www.deciphair.com/en/Mainz-EN/
It shows that the air environment regarding particules concentration is in some periods beyond recommended thresholds whereas others (long) periods are also low leading to an average estimate as good. So it would be worth to consolidate this vision by a larger evaluation to other towns in west part of Germany at different periods as we do in the Toulouse (France) region. Hoping that members of the sensors community are willing to support this initiative bringing their own evaluation.