Viet Nam: Ha Long Bay boat waste collection and treatment: final report, 2016. USAID; IUCN.
There are approximately 500 boats cruising through the bay waters, of which about 300 are dayboat and 200 are overnight-boats. In this report, bay waters refers to the three bays: Ha Long, Bai Tu Long and Lan Ha. Many of the boats that operate in the bay can be compared to floating hotels and thus generate lots of waste: both solid waste and waste water but also air pollutants (black fumes) and noise pollution.
Waste water includes black water (toilet waste), grey water (wastewater from sinks, baths,
showers and laundry) and bilge water (oily water that accumulates in the lowest part of a
ship). Hereafter, we identify and recommend concrete solutions to collect and treat waste water from such cruise boats and remove floating waste from the bay’s water. Indeed, it is necessary to implement active and concrete measures in order to address the decreasing environmental quality of the Ha Long Bay and restore the unique natural beauty of this important tourist location and World Heritage Site.