A-1 Certified Environmental Services, LLC. We provide the fastest and most reliable mold testing available. We also undertake Indoor Air Quality Testing and Mold Testing in San Francisco, Los Angeles, San Diego, San Jose, Sacramento, Long Beach, Oakland and in most regions of California. Typically, we offer any these services for residential homes, office buildings, schools, churches and warehouses. Essentially, we provide indoor air quality testing and mold testing for your home, office or commercial building no matter how large or small. Our indoor air quality testing provides accurate lab results that ensure you do not have harmful toxic particles or mold in your air.