We scrutinize potentially modifiable environmental risk factors of Parkinson’s Disease as targets for primary prevention, including factors that are also implicated in the etiology of other common chronic diseases. Our work is highly collaborative and interdisciplinary, as illustrated by the Parkinson-PEST study, which we lead jointly with Utrecht University, with key contributions from RIVM and the LUMC, UMCG, and ETZ medical centers. Thanks to the innovative design and scale of our studies, and the involvement of key societal stakeholders, our results have the potential to influence governmental regulation of environmental toxicants, thereby shaping a concrete path toward primary prevention.