Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Low-cost sensors provide a wide variety of modes of data collection, including hand-held devices, backpack units, wearable devices, indoor and outdoor fixed devices, and community sensors such as the Village Green sites (https://www.epa.gov/air-research/village-green-project)
