Arc-1 Radon Detection

About Arc-1 Radon Detection

ARC-1 Radon Detection is a certified, licensed, and insured radon measurement company based in Swansea, Illinois, serving the greater St. Louis Metro-East area. Founded and operated by Saundra Sininger, a licensed radon professional with seven years of industry experience and twenty years of active duty service in the United States Air Force, the company brings a military-grade commitment to precision and ethical performance on every project. Saundra holds an Illinois Professional Radon Measurement License (RNI2021224) and a National Radon Proficiency Program (NRPP) Certification (ID 112257-RMP), along with degrees from Eastern Kentucky University. ARC-1 Radon Detection specializes in professional radon measurement for single-family and multifamily residential properties, commercial buildings, schools, and daycare centers. The company primarily serves the Illinois counties of St. Clair, Madison, Monroe, and Clinton, with commercial and multifamily measurement services available throughout much of the Midwestern United States, including Illinois and Missouri. A key differentiator of ARC-1 Radon Detection is its exclusive focus on radon testing — the company does not perform mitigation, ensuring no conflict of interest for clients. ARC-1 is fully qualified to meet HUD Office of Multifamily Housing requirements for radon testing on FHA-insured multifamily mortgage applications, a specialized service requiring both certification and state licensure. Clients seeking rigorous, impartial radon measurement in southern Illinois and the broader Midwest will find ARC-1 Radon Detection a dependable and highly qualified partner.

Certifications & credentials

Trust signals listed in NRPP / AARST registries.

Services offered

• ›Residential radon testing
• ›Commercial radon testing
• ›Multifamily housing radon testing
• ›FHA-insured multifamily mortgage radon testing
• ›School radon testing
• ›Daycare center radon testing

Highlights