Free PurpleAir Sensors Available for Massachusetts Communities

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Apply for a MassDEP Air Sensor Grant

The Massachusetts Department of Environmental Protection (MassDEP) is offering a grant program for tribes, non-profits, community-based organizations, and municipalities to receive up to 5 PurpleAir sensors at no cost. These sensors measure fine particulate matter (PM2.5) outdoors, helping communities better understand and respond to air pollution.

Why PM2.5 matters:

PM2.5 consists of tiny solid particles and liquid droplets that can be inhaled deep into the lungs and even enter the bloodstream. Exposure can worsen asthma and other respiratory or cardiovascular conditions.

With these sensors, grantees can:

  • Collaborate with residents, schools, businesses, and community groups to track local PM2.5 levels
  • Increase public awareness of air quality and its health impacts
  • Identify areas with higher pollution and target mitigation efforts to protect public health

Important: If you are applying for these sensors, please let us know so we can calibrate them and add them to our Healthy Air Network, ensuring accurate readings and integration with our community monitoring efforts. 

Last modified: January 13, 2026

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