(Sat 12th / 12pm / free / meet outside Arnolfini)

Quality of water is quality of life.

Living in a city can be wonderful if the river is clean and deeply depressing if dirty.

People that pollute rivers and lakes are criminals, but that's another story.
It is common mythology that immersion in The City of Bristol Docks will prove fatal.
Analysis of regular Bristol City Council test results suggest that swimming in the docks is safe half of the year and blue flag equivalent at least once a year.
http://duo.irational.org/avon_canoe_pilot/bristol_blue_flag/

Bathurst Basin and Cumberland Basin are the cleanest areas of the docks, but watch out for grumpy people in boats.