MassDEP:: Air & Climate :: Air Quality & Monitoring

MassDEP Quick Links:

Select data for your graph to display:

Pollutant:	Period:
Calculation:	Region:

Monitor Sites:

Show AQI

- - - - this line is the Federal Standard (or if displaying AQI, the level Unhealthy for Sensitive Subgroups) Show AQI - click box to display different pollutants in common units of the Air Quality Index (AQI).

Data Disclaimer -- raw vs. final data	Breaks in the data explained
Download options explained	Negative values explained
FAQs for the graphs	FIND MORE AIR DATA HERE

Long-term Trends by Pollutant

MassDEP has monitored some pollutants for more than 20 years. You can find summaries of long-term historic data at the following links.