Walnut Creek is the first Bay Area city to partner with Arrivalist, a travel industry company that uses phone location data to provide the Walnut Creek Chamber of Commerce information on how many people visit the city for longer than two hours. Arrivalist collects information on how many people from outside Walnut Creek visit, how long they stay, and where they go, using WiFi signals, cell phone towers, and location tracking devices, without user consent or notification.