Daily Average Mauna Loa CO2: count

Week beginning on June 7, 2020: 416.34 ppm Weekly value from 1 year ago: 414.39 ppm Weekly value from 10years ago: 392.70 ppm Last updated: June 19, 2020

Source: National Oceanic and Atmospheric Administration; Mauna Loa Observatory has been monitoring C02 levels since 1958