Why did industrial cities often develop crowded slums and poor sanitation?

The development of crowded slums and poor sanitation in industrial cities was primarily driven by the rapid, unplanned influx of rural migrants seeking employment in factories during the Industrial Revolution.12

Several key factors contributed to these conditions:

• Rapid Population Growth: The sudden concentration of workers in mill and factory towns outpaced the ability of local institutions to provide adequate housing and infrastructure.32
• Inadequate Infrastructure: Existing municipal systems, often of medieval origin, were ill-equipped to handle the massive increase in residents. Consequently, local sewerage and sanitation systems were quickly overwhelmed.324
• Economic Prioritization: The "city problem" was largely exacerbated by an unwillingness to pay the necessary costs for public health, civic improvements, and social planning.3
• Housing Shortages: Before modern building codes were established, the immediate demand for shelter led to the construction of substandard, cramped housing and shantytowns.12

These conditions created environments where infectious diseases like cholera and typhoid fever spread easily through contaminated water supplies, eventually forcing the development of modern urban planning and improved sewage systems.24