Please use the form linked below to register for the EPA Tools & Resources Webinar: Air Sensors: Extension of the U.S.-Wide Correction for Purple PM2.5 sensor data during high concentration smoke events  on May 19, 2021 from 3-4 PM ET. If you have any questions, contact tools_resources_webinar@epa.gov. 

Registration Link: https://www.epa.gov/research-states/forms/register-epa-tools-resources-webinar-air-sensors-extension-us-wide-correction