Urban Water Supply

Technology, Engineering, and Urbanization

Ancient engineering techniques for moving water for domestic purposes displayed keen engineering skill in using gravity. Innovations included the use of natural and manufactured pipes, containers, and taps and the use of various simple machines. The Roman aqueducts, for example, moved large quantities of water over long distances and efficiently and elegantly stored and distributed water within cities. Other ancient and medieval societies similarly mastered the use of gravity, with varying degrees of precision.

Bringing water to a city allowed both private and public uses. In addition to meeting practical needs, many of these uses were symbolic and served to reinforce or legitimate sets of power relations. Even in medieval Europe, regarded as a period of technological reversal and stagnation, the exploitation of water sources outside cities and the construction of water conduits continued. In this case, it was often through the exercise of the ecclesiastical power of the Church rather than the secular power of government. Expertise in gravity-based techniques diffused from city to city or from monastery to monastery. Adoption, [Page 3000]however, was uneven, and even with adoption, place-based particularities influenced access to water and the types of uses made of it—for example, open fountains in Italy or spigots in England.

Cities and towns with ample local water supplies or proven long-distance access to them sometimes enjoyed a comparative advantage as manufacturing and later industrialization took hold. In cities that experienced rapid population growth in the manufacturing era, adequate potable water supplies became a necessity. Demands for potable water supplies in the largest cities were driven by concerns over public health, as human and industrial waste had compromised available local supplies. It had become clear that piecemeal private provision of water was insufficient to protect the rich and powerful against the threats of waterborne diseases. Responding to both elite demands and the pressure of broader political movements, collective and most often public ownership and operation of urban water emerged. Success in the development of water and sewerage services dramatically reduced the impact of waterborne diseases. Rapid growth required significant additions to the water resources of cities, particularly if the available local resources were limited or too polluted for use.

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