Mold and indoor air quality testing professionals inspect homes for moisture problems and mold, collect samples and explain what the results mean. Testing can help when mold is suspected but not visible, or to check conditions after remediation.
Common testing services include:
Consider testing when you notice musty odors, have had leaks or flooding, or want independent confirmation after mold cleanup. Radon and asbestos testing have their own categories.
With over 20 years of experience, Benchmark Environmental Engineering provides complete environmental inspection, consulting, and training services to homeowners, businesses, property owners, property managers and insurance companies in California. Our trained professionals can assist you in ensuring that your commercial or residential property is safe for both you and your occupants. For further info, call us or visit our website.
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Air Liquide Electronics is the electronics-focused division of Air Liquide that supplies ultra-high-purity gases, advanced and specialty materials, equipment, installation services, and total gas and chemical management plus analytical services to the semiconductor, flat panel display, and photovoltaics industries. Air Liquide Electronics positions innovation, reliability of supply, and sustainability at the core of its work and supports customers with on-site industrial solutions, recycling and decarbonization efforts, and end-to-end operational support; the company reported about €2.5 billion in revenue in 2024, employs roughly 4,600 people worldwide, holds hundreds of patents, and maintains locations and facilities across North America, Europe, Asia and the Middle East to serve global semiconductor supply chains.
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CKC Laboratories, Inc. is an independent EMC (electromagnetic compatibility), EMI/RFI and product testing laboratory founded in 1973 that provides comprehensive testing, certification and engineering services for safety-critical and regulated industries. CKC Laboratories offers EMC testing for aerospace/avionics, automotive, medical, military and wireless products, as well as antenna calibration, environmental and dynamics testing, electrical safety, agency certification (FCC, Industry Canada, CE and more), and consulting and design support. The company emphasizes more than 50 years of technical experience, extensive accreditations (including TCB/CAB status and various international approvals), ITAR/EAR registration and NIST 800-171 compliance, and a customer-focused approach that includes training webinars and global lab scheduling.
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Element Materials Technology (Element) is a global provider of laboratory-based testing, inspection and certification services that helps organizations in highly regulated, safety-critical industries make confident decisions and bring products to market. Element delivers materials testing, product qualification, non-destructive testing, certification and global market access services, as well as digital engineering, calibration, metrology, failure analysis and advisory services across sectors including aerospace, connected technologies, energy, construction & infrastructure, transportation and health & life sciences. The company operates a global network of 270+ locations, supports customers in 165+ countries with more than 8,500 experts and over 190 years of combined experience, and emphasizes extensive accreditations, technical expertise and the purpose of “Making tomorrow safer than today.”
Fastest Labs provides rapid, reliable drug, alcohol, and DNA testing services for individuals, employers, and organizations. Fastest Labs operates clean, certified laboratories and a network of franchised locations offering individual testing (urine, hair, saliva, nail, sweat/skin), alcohol testing (including breath and EtG), comprehensive DNA testing (paternity, court-admissible, immigration, forensic), and employer solutions such as DOT testing, pre-employment screening, random and for-cause testing, on-site services, and program design. Fastest Labs emphasizes fast, accurate results, certified collectors, strong customer service, and franchise opportunities while serving a broad range of customers including businesses, schools, government agencies, and individuals.
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Sutter Health is a not-for-profit healthcare network that provides integrated care across hospitals, medical foundations, clinics and virtual services throughout California; Sutter Health offers primary care, urgent and emergency care, specialty services including cancer, heart and vascular, neuroscience, women’s and children’s health, and supports research, clinical trials and graduate medical education. Sutter Health operates digital patient tools such as My Health Online for appointment scheduling, results and telehealth visits, runs a health plan to provide coverage options, and emphasizes on-time access to care, quality and safety—reflected in national recognitions and hospital awards—while maintaining a mission-driven focus on community benefit and patient-centered services.
ISE Labs is a semiconductor engineering and testing services provider (a member of ASE) that delivers turnkey assembly, packaging, production test, device qualification, reliability, and hardware development services for the semiconductor industry. ISE Labs combines engineering-driven test and reliability capabilities with production test and material/packaging services to support customers across design verification, qualification and high-volume manufacturing, and the company is headquartered in the heart of Silicon Valley with facilities in Fremont and San Jose (ISE Labs website; company profile and location details on LinkedIn and ZoomInfo).
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Kaiser Permanente is an integrated health care organization that combines Kaiser Foundation Health Plans, Permanente Medical Groups, and Kaiser Foundation Hospitals to provide coordinated care, insurance, and preventive services across multiple U.S. regions; the company operates a nationwide network of doctors, clinics, hospitals, and digital member tools for medical records, appointments, pharmacy, and telehealth, and offers employer and broker solutions, community health programs, research and education, and a broad suite of wellness and coverage options focused on whole-person, preventive care.
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Labcorp (Laboratory Corporation of America® Holdings) is a leading diagnostics and life sciences company that provides clinical laboratory testing, diagnostic services, and biopharma solutions through a nationwide network of patient service centers and laboratories. Labcorp offers appointment scheduling and walk-in lab services, test preparation guidance and results access for patients, on-demand consumer testing and paternity services, employer and provider testing solutions, and comprehensive support for clinical trials and biopharma research. The company emphasizes broad geographic coverage, convenient access to locations and services, integrated testing and data solutions, and resources for billing and insurance to support patient care and drug development.
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Labcorp (Laboratory Corporation of America® Holdings) is a leading diagnostics and life sciences company that provides clinical laboratory testing, diagnostic services, and biopharma solutions through a nationwide network of patient service centers and labs. Labcorp offers appointment scheduling and walk-in lab services, test preparation and results access for patients, on-demand consumer testing, employer and provider testing solutions, clinical trial and biopharma support, and extensive resources for billing, insurance, and test information. The company emphasizes broad geographic coverage, convenient access to locations and services, and integrated testing and data solutions to support patient care and drug development.
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A mold inspector looks for visible growth and signs of moisture, uses tools such as moisture meters and thermal cameras, may collect air or surface samples for a laboratory, and provides a report with findings and recommendations.
Testing can help when there are musty odors or past water problems without visible mold, when buying a home, or to verify that remediation worked. If mold is clearly visible, fixing the moisture and removing it is often the priority.
Look for an inspector who does not also perform remediation on the same job, explains which samples they will take and why, and uses an accredited laboratory. Ask whether your state licenses mold assessors.
Cost depends on the size of the home, the number of samples, laboratory analysis, the scope of the inspection and whether a written report or follow-up testing is included.
Follow the inspector's instructions, which may include keeping windows closed and avoiding cleaning or running air purifiers before sampling. Provide access to attics, basements and areas with past leaks.