A simple google search provides several articles on this Ras, so not sure why you are amazed.
Here is an incredibly boring read:
http://coastecology.org/wp-content/u...oral-Reefs.pdf
And an older newspaper article:
http://www.jamaicaobserver.com/news/...llution--again
If you read this and had no knowledge that the treatment plant was upgraded why would you think different. The power of the internet to influence one's thinking is remarkable.
When I saw the tannic water in early December it had a reddish hue to it. Maybe this is how Bloody Bay got it's name and it had nothing to do with whaling.