The biggest effects of water quality within the Nanny Cay marinas are run-off from the land side, sargassum, and effluent from the Slaney outfall.
Water testing has been going on for many years at Nanny Cay and the testing has shown that the water quality leaving Nanny Cay is better than the water quality entering Nanny Cay.
But works will include improving the flushing to the inner and outer marinas. Based on modelling by Applied Technology and Management (ATM), a US-based environmental services consultancy, good flushing can be achieved by widening the existing bridge and dredging the existing flushing channel to a depth of 8 feet. In addition, flushing culverts to improve flushing will be added to the new marina.
Water flows from east to west and Nanny Cay is downwind and downstream of Sea Cows Bay, the water that leaves has no effect on Sea Cows Bay.