:people in london in the mid-nineteenth century greatly feared cholera. at this time ) that cholera (circulate) through the air, and realize) that all the time raw sewage ) water supply, and that the disease ) through the domestic water system. although in the 17th and 18th centuries london (possess) a water supply system and a sewage system which were the changing situation. broken water pipes and sewage pipes often ) into one another, and most sewage up) in the river thames, which was the main source of drinking water for thousands. between 1831 and 1867 a series of severe outbreaks ). in the outbreak of 1848-49, there were over 30000 cases of the disease in london, and 15000 people ). by the mid 1860s the situation ) mainly because by then engineers on) the construction of a completely new sewage system, which they ) in 1875, and which is still in use today.
