- Digital Diagnostic Systems
 - Offers mould test kits and digital testing services for toxic moulds, stachybotrys, allergies, sick building syndrome, and indoor air quality. - First Environmental Services, Inc.
- Offering kits for the home or office that can test the air quality for bacteria, yeast, and mould pollutants.
- MACS Lab
- Specialising in hazardous materials, also offering assessment and remediation services. Order home test kits for paint, water and soil.
- Mercuryvapor.com
- Provides testing kits for mercury vapor.
- Professional House Doctors, Inc.
- Environmental test kits for the home.
- Systems Scientific Labs
- Offers alloy detectors and metal test kits. Indentifies stainless, carbon, and alloy steels, electroplated and scrap metals, brass, bronze, and aluminium alloys.
- WHI USA
- Offers BART test kits to determine the presence of MIC (Microbiologically Influenced Corrosion) bacteria in water sources.
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