11. During these times, the inhabitants of London would dispose of their waste into cesspits, the contents of which would find its way, probably at street level, into which major source of London's drinking water?
From Quiz The Great Stink
Answer:
River Thames
The population of London doubled between 1801 and 1841, and the volume of sewage reaching the Thames became a serious public heath hazard. Interestingly enough, some properties had their sewage collected at night by "soil men" for use as fertilizer on the fields around London. Recycling at its best, but not a nice job.
The River Wandle runs through southwest London for approximately 9 miles. It joins the River Thames at Wandsworth. The Wandle was probably used as a source of drinking water and as a sewer but became known for being polluted by industry. A little further away is The River Severn, the longest river in Great Britain, at 220 miles. It rises in Wales, then flows through Shropshire, Worcestershire and Gloucestershire.
Back to London, the River Fleet is London's largest subterranean river. It once ran on the surface but was eventually covered over. At one time it was little more than an open sewer.