Definition:
A sanitary city is an urban
form developed to correct the ills and hazards of the industrial city (Fig. 1). 
Figure 1. Industrial city hazards stimulated the development of the sanitary
city.
Sanitary cities segregate
wastes and other hazards from residents.
Early sanitary cities accomplished this by collecting and piping sewage
downstream (Fig. 2) or out to sea, by landfilling solid waste, by erecting tall
smokestacks, and by employing single-use zoning. As environmental awareness increased, the
waste streams were treated more effectively.
Sanitary city solutions are engineered, management is based on separate
sectors, such as water, traffic, health, etc., government is the active decision
making and funding entity. Furthermore,
some aspects of environmental improvement assume that the demographic
transition will play a role in improving people’s well being in the sanitary
city.
Figure 2. The sanitary city depends on
massive investment in infrastructure, originally designed to remove or
segregate hazards from residents. Here a
large storm drain emerges from below ground to join a surface stream.
Examples:
Sanitary cities are
now common in countries where industrial or colonial wealth accumulated. Baltimore is an example of a sanitary city,
characterized by separate sanitary sewer and stormwater runoff collection
systems. Sanitary sewage is treated at
least to the secondary level, in which biological digestion occurs at the end
of the collection pipe. Solid waste is
collected, and an incinerator reduces the volume while generating
electricity. Recycling is a relatively
recent addition to the sanitation regime.
In the United States, the Clean Water Act and the Clean Air Act have
been important in reducing the impact of urban areas as pollution generators.
Why Important:
The sanitary city has
been an immense boon to human health and wellbeing in those nations and regions
that have been able to implement and maintain the expensive technical
infrastructure. However, many cities or
informal settlements have little access to basic sanitation, such as clean
water delivery and collection and treatment of human and animal waste (Fig. 3). In sanitary cities there is an increasing recognition
that there are still improvements still to be made in environmental quality, and
reduction of resource use, including energy, water, and building
materials. The increasing concern with
environmental equity and quality of life and livelihood have been added to the
mix by citizens and urban policy makers, who now call for cities to become more
sustainable. Hence, the sanitary city as
a current state and ideal is contrasted with visions of the Sustainable City.
Figure 3. Informal development near Cape Town, South Africa. Such shanty and favela settlements are common
in rapidly growing cities around the world.
Many originally had no or rudimentary sanitary infrastructure, and such
conditions persists in many. Photo S.T.A.
Pickett.
For more information:
·
Gandy, M. 2003.
Concrete and clay: reworking nature in New York City. MIT Press, Cambridge.
·
Melosi, M.V.
2000. The sanitary city: urban infrastructure in America from Colonial times to
the present. Johns Hopkins University Press, Baltimore.
·
Olson, S.H. 1997.
Baltimore: the building of an American city. The Johns Hopkins University
Press, Baltimore.
