(Whitewater Valley)--Most of the Whitewater Valley is again under an Air Quality Alert Monday as a result of smoke from Canadian wildfires.  Only Preble and Darke County are exempt.  Richmond’s Air Quality Index Monday morning was at 152.  That’s considered in the unhealthy range.  People with certain health issues may feel the effects.  Even though Monday’s reading at 152 in Richmond is unhealthy, it’s not quite as high as a couple of weeks ago when the reading hit 161.