Mariposa County Sunday Afternoon Air Quality Has Decreased to Moderate to Unhealthy for Sensitive Groups as Wildfire Smoke Lingers Details Last Updated: Sunday, 06 September 2015 15:37 Published: Sunday, 06 September 2015 15:35 View Comments Update: 3:30 P.M.September 6, 2015 - Air Quality Smoke Impact Report for Mariposa County on Sunday Afternoon, September 6, 2015. Air Quality this afternoon has bumped up into the Moderate to Unhealthy Range for Sensitive Groups. View the discussion thread. back to top