There's definitely still a sewage treatment plant near the site of the accident: https://www.google.com/maps/place/Sheerness,+UK/@51.5112905,0.0848886,1853m/ h

There's definitely still a sewage treatment plant near the site of the accident: https://www.google.com/maps/place/Sheerness,+UK/@51.5112905,0.0848886,1853m/ https://www.google.com/maps/place/Sheerness,+UK/@51.5112905,... https://en.wikipedia.org/wiki/Beckton#Sewage_works https://en.wikipedia.org/wiki/Beckton#Sewage_works But you can't discount the difference between the dictionary definition of "sewage" versus the reality of incidental pollution as discovered in-situ. Case in point: https://en.wikipedia.org/wiki/Gowanus_Canal https://en.wikipedia.org/wiki/Gowanus_Canal http://nymag.com/daily/intelligencer/2010/03/post_25.html http://nymag.com/daily/intelligencer/2010/03/post_25.html https://www.timeout.com/newyork/blog/ten-feet-of-black-mayonnaise-line-the-gowanus-canal-101315 https://www.timeout.com/newyork/blog/ten-feet-of-black-mayon... https://ny.curbed.com/2018/7/19/17590126/brooklyn-gowanus-dredgers-canoeing-superfund-site https://ny.curbed.com/2018/7/19/17590126/brooklyn-gowanus-dr... http://nautil.us/blog/in-the-black-mayonnaise-of-brooklyns-gowanus-canal-alien-life-is-being-born http://nautil.us/blog/in-the-black-mayonnaise-of-brooklyns-g... https://www.brownstoner.com/development/gowanus-canal-black-mayonnaise-superfund-epa-cleanup-brooklyn/ https://www.brownstoner.com/development/gowanus-canal-black-... https://www.dnainfo.com/new-york/20161123/gowanus/gowanus-canal-debris-removal-epa-environmental-protection-agency/ https://www.dnainfo.com/new-york/20161123/gowanus/gowanus-ca... Also: https://en.wikipedia.org/wiki/Newtown_Creek https://en.wikipedia.org/wiki/Newtown_Creek