Air quality within and around structures can be effected by gasses, particulates or microbial contaminants. These include but are not limited to mold, carbon monoxide, asbestos, and radon. County of Orange Environmental Health does not regulate indoor air. However, we wish to provide you information and some tips to assist you in dealing with your situation. The information provided below has been gathered from other governmental agencies and/or reputable news sources and is believed to be accurate at this time.