A-1 Certified Environmental Services, LLC, founded in 2003, is based in San Francisco and services the surrounding areas. As a leading firm in environmental and indoor air quality testing, they offer a comprehensive suite of services that include mold testing, VOC detection, formaldehyde testing, and meth residue detection, among others. They cater to residential homes and commercial establishments, leveraging their 27 years of experience in the construction industry to provide reliable and accurate results. A-1 Certified Environmental is committed to ensuring the quality of your environment, offering objective, non-bias test results.