Eugene/Springfield, Oakridge & Cottage Grove Air Quality Index Air Quality/Weather by Tim Chuey For the local area: Eugene/Springfield: The Air Quality Index is 78 in the Moderate category measuring Particulate Matter. Oakridge: The Air Quality Index is 61… Keep Reading Facebook Twitter Google Pinterest You might be interested in A bit cooler, but a pleasant day coming for your Saturday. We’ll enjoy this sunshine and the mild temperatures into the weekend. Enjoy this weather while it lasts. Change is coming.