Maybe I am not understanding this issue very well. 1.The run-off from heavy rains in the hills/mountains flows into the Negril River and out into the ocean, causing that brown water issue, correct? 2.The run-off is not treated prior to entering the Negril River and the river is not treated prior to flowing into the ocean, correct? If 1 and 2 are correct, then it would seem inevitable that there would be biological contaminants(human and animal), organic contaminants and inorganic contaminants in the run-off, unless Negril treats stormwater run-off, which I doubt that they do. Nothing in those links pointed towards stormwater treatment, only waste water treatment. Certainly waste treatment is vital to improving the sea quality because the effluence from the waste treatment has to go somewhere and that would be into the river/ocean. In many US cities, stormwater run-off is not treated prior to being directed into the ocean. If you ever look at at storm drains in coastal cities, you will see signage indicating "Flows Directly to Ocean/Sea". When it is treated, it is usually by impoundment in retention ponds, etc...not by going to the wastewater treatment facility.
