历史小径·世界史英语30篇（1）
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London’s Thirst: Water, Cholera, and the Birth of Public Health
伦敦之渴：水、霍乱与公共卫生的诞生
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In 1854, London had no clean water system, and sewage flowed into the Thames River daily.
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Dr. John Snow mapped cholera cases near Broad Street and linked them to a contaminated water pump.
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His evidence challenged the miasma theory and showed disease could spread through dirty water.
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City leaders slowly accepted that clean water supply was essential for urban survival.
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Engineer Joseph Bazalgette then designed a vast underground sewer network for London.
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By 1875, over 1,100 miles of sewers carried waste away from homes and rivers.
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This infrastructure shift made cities safer and inspired similar projects in Paris, Berlin, and New York.
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Water testing, filtration, and chlorination later became global standards for municipal systems.
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Public health law now required governments to guarantee safe drinking water for all citizens.
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Today’s water rights movements still echo those 19th-century struggles for equity and access.