As government sensors fall short, people are buying their own to protect against particulate pollution linked to heart and lung disease, cancer and a higher overall risk of premature death.

Dani Parent, organizing director for the West Virginia Citizen Action Group, said her organization helps interested residents install Purple Air Quality Monitors in their neighborhoods.

This is a Homebridge accessory plugin for monitoring air quality in Apple HomeKit. It creates virtual HomeKit air quality sensors based on real PurpleAir sensors. Once setup, you can also configure ...

“The federal one, the AirNow app, is never as precise as our Purple Air monitor here,” Haldeman said, noting that AirNow frequently underreports the pollution in their area. “I think it’s ...