About A-1 Certified Environmental Services
A-1 Certified Environmental Services is a Bay Area-based mold and indoor air quality testing company built on a simple promise: honest, independent results with no conflict of interest. Because A-1 performs testing only — never remediation — clients get objective, unbiased reports they can actually trust, whether they’re a homeowner investigating a musty smell, a buyer navigating a real estate disclosure, or a business addressing an air quality concern. The team is certified through Pro-Lab, ESA, and MASLabs, and combines that technical training with real construction industry experience to track problems back to their root cause. Serving San Francisco, the greater Bay Area, Sacramento, and Los Angeles, A-1 offers mold testing, indoor air quality testing, VOC testing, and mold clearance testing, backed by a reputation for fast turnaround, clear communication, and a 5-star track record with clients and real estate professionals alike.
BIO
Carl Gibbons
Owner & Lead Inspector, A-1 Certified Environmental Services
Carl Gibbons is the owner and lead inspector at A-1 Certified Environmental Services, and one of the most trusted names in indoor air quality and mold testing across the San Francisco Bay Area and California. With over 20 years of combined experience in construction and environmental science, Carl has built his career on a principle that’s increasingly rare in his industry: complete independence. A-1 performs no remediation work of any kind, which means every test, every sample, and every report Carl delivers is free of the conflicts of interest that plague so much of the mold inspection business.
Carl holds certifications from Pro-Lab, ESA, and MASLabs, and his background in construction gives him a practical understanding of building science that goes beyond simply identifying mold — he knows how to trace a problem back to its source, whether that’s a hidden roof leak, a failed vapor barrier, or a moisture issue behind a wall that’s been quietly growing for years. Clients and industry partners alike, from the SF Apartment Association to SILVAR-affiliated realtors, rely on his findings for their accuracy and objectivity.
What sets Carl apart isn’t just his technical expertise — it’s his hands-on approach with clients. He’s known for showing up same-day, walking homeowners through their reports line by line, and explaining exactly what the results mean and what to do next. Whether it’s a homeowner who just discovered a musty smell, a realtor navigating a disclosure issue, or a property manager handling a commercial air quality complaint, Carl treats every property with the same rigor and every client with the same patience.
Today, Carl and his team at A-1 Certified Environmental Services provide mold testing, indoor air quality testing, VOC testing, and mold clearance testing for homeowners, buyers, landlords, and businesses throughout San Francisco, the Bay Area, Sacramento, and Los Angeles — backed by a 5-star Yelp reputation and a simple promise: honest answers, no upsells, no surprises.
