Environmental, road conditions and mobility patterns data collected in real-time from the bicycles moving in the city can be used for a wide range of purposes. Among these, pollution data can support health navigation system that can be tailored on different types of diseases. In this scenario, the navigation system suggests ideal paths for whom suffers of asthma. By defining a certain destination and the amount of time to reach it, the navigation application automatically suggests directions to avoid streets that have a higher risk.