Small, Portable Sensors Allow Users to Monitor Exposure to Pollution on Their Smart Phones | Pollution in North America |

Computer scientists at the University of California, San Diego have built a small fleet of portable pollution sensors that allow users to monitor air quality in real time on their smart phones. The sensors could be particularly useful to people suffering from chronic conditions, such as asthma, who need to avoid exposure to pollutants.


CitiSense is the only air-quality monitoring system capable of delivering real-time data to users’ cell phones and home computers—at any time. Data from the sensors can also be used to estimate air quality throughout the area where the devices are deployed, providing information to everyone—not just those carrying sensors.  


Just 100 of the sensors deployed in a fairly large area could generate a wealth of data—well beyond what a small number of EPA-mandated air-quality monitoring stations can provide. For example, San Diego County has 3.1 million residents, 4,000 square miles—and only about 10 stations.

“We want to get more data and better data, which we can provide to the public,” said William Griswold, a computer science professor at the Jacobs School of Engineering at UC San Diego and the lead investigator on the project. “We are making the invisible visible.”

Via Dr. Stefan Gruenwald