After all (quoted from the last link):
“Authorities have assured the 23 million residents of the Shanghai urban area that the water supply, of which 20% comes from the Huangpu (the pig-cum-dead-duck river), is safe……
A local official was quoted by the Jiaxing Daily last week as saying the cause of the deaths was “complicated” but the number was “within the normal range” expected in such a large population”.
I am reassured.
HT to RC