On 12/12/2015 13:46, Dave Plowman (News) wrote:

It is not established that sewage freezes above freezing point any more
than ordinary river water does.

Not just sewage in the Thames. All sorts of chemicals from the industries
of the day. Not saying that influenced the freezing point though.


Nearly everything that makes a solution in water freezes below 0C.

I don't recall anything that makes it freeze at a higher temperature.