An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Air Sensor Toolbox

Conferences, Workshops and Webinars on Air Sensor Technology

EPA hosts and participates in a number of conferences and webinars related to air sensors. Topics discussed include state-of-the-science of air sensor technologies, updates on EPA research projects, sensor applications, sensor performance targets, best practices for using sensors, and more.

For all upcoming events, including EPA hosted conferences, workshops and webinars on air sensors, visit the EPA Research Events calendar.


Air Sensors International Conference Presentations – October 2020

The Air Sensors International Conference (ASIC), hosted by the University of California-Davis Air Quality Research Center, brought together different stakeholders from academia, government, communities, and commercial entities in a virtual setting to promote and advance air pollution sensors, improve the data quality from these sensors, expand the pollutants measured, and foster community involvement in monitoring air quality. EPA was a conference partner.

Visit the conference website to access all presentations and recordingsExit

EPA presentations included:The following links exit the site Exit

Webinar: Development & Performance Validation of U.S.-Wide Correction Equation for PurpleAir Sensor Data – September 16, 2020

This webinar, hosted by EPA, summarized the development and validation of the U.S.-Wide Correction Equation for PM2.5 data from PurpleAir sensors. This correction is being applied to PurpleAir sensors before the company’s  data are displayed as part of the pilot low-cost sensor data layer on the AirNow smoke and fire map. This webinar also describes some known or suspected issues with the performance of the correction equation and addresses some of the common questions from consumers about using crowdsourced air sensor data. 

Webinar RecordingExit

3rd International Smoke Symposium – April 20-24, 2020

The 3rd International Smoke Symposium,  hosted in a virtual setting by the International Association of Wildland Fire,  discussed research, management, and policy related to wildfires. The target audience included governmental air quality regulators. land managers and fire practitioners, research and extension communities, public health professionals, air quality and fire weather forecasting communities, and climate change researchers. The conference was conducted in partnership with National Wildfire Coordinating Group (NWCG) Smoke Committee, University of California-Davis (UC Davis) Air Quality Research Center, UC Davis Office of Research, and the UC Davis School of Medicine.

Symposium informationExit

EPA poster presentation recording:

Using a Particle Sensor Network to Characterize Indoor and Outdoor Air Quality of Buildings in Areas Prone to Wildfires – April 23, 2020Exit


EPA Tools and Resources Webinar: FRMs/FEMs and Sensors: Complementary Approaches for Determining Ambient Air Quality – December 18, 2019

This webinar summarized the advantages and disadvantages of the regulatory Federal Reference Method (FRM)/Federal Equivalent Method (FEM) program and of sensor-based instruments used for non-regulatory monitoring. The complementary nature of these two measurement approaches for determining ambient air quality based on specific monitoring goals is also summarized.

Webinar Slides

Air Sensors 2019: EPA’s Second Workshop on Deliberating Performance Targets for Air Quality Sensors – July 16-17, 2019

This workshop and webinar was hosted by EPA to solicit individual stakeholder views related to non-regulatory performance targets for air sensors that measure carbon monoxide (CO), nitrogen dioxide (NO2), sulfur dioxide (SO2), and particulate matter with diameters of 10 micrometers or less (PM10).

Workshop AgendaExit

Workshop Presentations Exit

Deliberating Performance Targets: Follow-on workshop discussing PM10, NO2, CO, and SO2 air sensor targetsExit

EPA Tools and Resources Webinar: Low-Cost Air Quality Sensors – April 17, 2019

This webinar focused on research that is advancing the development and evaluation of air sensor technology and helping communities learn more about air quality.

Webinar Presentation


Air Sensors 2018: Deliberating Performance Targets for Air Quality Sensors Workshop – June 25-27, 2018

This workshop and webinar was hosted by EPA to solicit individual stakeholder views related to non-regulatory performance targets for air sensors that measure fine particulate matter (PM2.5) and ozone (O3). Checking for broken link to presentations.

Workshop Agenda

Workshop Presentations

Webinar: Emerging Sensor Technologies 2014-2018 Progress Report – April 30, 2018

EPA and partners have been involved in emerging air quality sensor research. This webinar provided an overview of general findings across a range of air sensor activities conducted by EPA researchers from 2014 to 2018. Topics include sensor evaluations, data analytics, ammonia detection, citizen science , emission source detection, and more.)

Progress Report 


EPA Tools and Resources Webinar:  Air Quality Monitoring and Community Science - June 29, 2016

This webinar summarized EPA’s research on low-cost, compact air sensors to monitor air quality in communities and promote citizen science.

Webinar Presentation