Since 1993, the URA section has maintained a network of high-flow aerosol collectors. Currently, six stations are in operation:
- HV-POS: Posieux / FR – online data
- HV-CAD: Cadenazzo / TI – online data
- HV-GUT: Güttingen / TG –online data
- HV-CERN: Meyrin / GE – online data
- HV-KLI: Klingnau / AG – online data
- HV-LBF: Liebefeld / BE – online data