From Melissa:

Air quality monitoring stations in Lualualei, Timberline and Waianae offer daily measurements of Sulfur Dioxide, Ozone, Carbon Monoxide and Particulates in the surrounding areas on an easy-to-use website. The color-coding system on the website is aesthetically pleasing and shows the condition of each pollutant for that day.

A small disclaimer notes:

The data on this web site are preliminary and await review and validation by qualified staff. The data may be revised or invalidated after review. Every effort is made to assert the validity and integrity of the real-time data displayed on this web site, but data can be affected by equipment malfunctions, technical difficulties and other unforeseen circumstances.

So check your air quality, but question the data as well.

The website is user-friendly and answers basic questions about their system.

West Oahu Air Quality Monitoring website