Analytical research on indoor microbial communities, sanitation chemistry evolution, and the science of built environment hygiene in modern cities.
Explore Research Articles Test Your KnowledgeIn-depth coverage of indoor microbiology, disinfection science, and urban sanitation trends from our editorial and research teams.
A comprehensive three-year investigation across 42 German office buildings reveals that microbial density in sealed ventilation systems exceeds outdoor air concentrations by a factor of 300–800, with far-reaching implications for occupational health policy and building management standards.
Legionella pneumophila thrives in building water systems between 25–45°C. New European standards demand quarterly risk assessments for all commercial buildings with more than 50 occupants.
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Tracing the molecular lineage of modern disinfectants: how quaternary ammonium compounds replaced phenol derivatives and why next-generation photo-catalytic formulations are now entering the market.
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A field study sampling 18 transit lines across Berlin, Munich, and Düsseldorf maps the geographic distribution of antibiotic-resistant organisms on high-contact surfaces.
Read Article →For most of the 20th century, public health discourse focused almost exclusively on outdoor environmental factors — air pollution, water contamination, soil toxicity. The built environment was regarded as a neutral container, a passive backdrop to human activity.
Contemporary metagenomic analysis has shattered this assumption. Every sealed building — every office tower, residential block, hospital ward, or transit station — harbors a complex microbial community that responds dynamically to human behavior, material composition, ventilation engineering, and cleaning chemistry.
CleaningHouses.org exists to translate this science into accessible, rigorously sourced analysis for policy professionals, facilities engineers, public health practitioners, and informed citizens.
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Test your knowledge of indoor microbiology, disinfection chemistry, and building hygiene with our expert-designed assessment. 7 questions, immediate feedback, and detailed explanations.
By Dr. Felix Braun · November 5, 2024 · 9 min read
By Prof. Inge Hartmann · October 19, 2024 · 11 min read
By Dr. Klara Weisberg · September 22, 2024 · 14 min read
By Editorial Team · September 8, 2024 · 10 min read
Monthly digest of peer-reviewed studies, regulatory updates, and field reports from Germany and Europe.