I know that there is an increasing incidence of E. coli in degraded bodies of water caused by pollution, namely through an excess of agricultural runoff, including chemicals and animal waste. It's interesting, I think, how the rise of swimming as a bourgeois recreational activity and a basic social function within the past one hundred years has coincided with the necessary rise of mass, monocultural agribusiness to service megacities, which exponentially pollute the swimming locations or fill them with dangerous chemicals but without which there would be no such mass bourgeois social activities as a regular feature of mainstream Western nuclear family life. A paradox, no ? Something to think about.