NO2 Concentrations Map (IMAGE) NASA/Goddard Space Flight Center Caption This map shows average concentrations of nitrogen dioxide for 2022 over the U.S., as detected by the Ozone Monitoring Instrument on NASA's Aura satellite. Higher concentrations are in red and purple. Lower concentrations are in blue. Credit NASA's Scientific Visualization Studio Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.