As rjonsun stated, the water is tested weekly by regulators that come from Montego Bay. According to the NWC (National Water Commission):
"Our Regulators
In addition to the Ministry of Water, Land, Environment and Climate Change and the provisions of the NWC Act, the National Water Commission is regulated in different areas and to different degrees by a number of different entities.
The island's surface and sub-surface water resources are regulated by the Water Resources Authority (WRA) which is the agency established by statute for this purpose. Other bodies that regulate the NWC are the Office of Utilities Regulation (OUR), the Ministry of Health, National Environment and Planning Agency (NEPA), the Jamaica Bureau of Standards, the Ministry of Labour, and the Factories Act."
http://www.nwcjamaica.com/REGULATORS.asp
Here is the link to the Water Resource Authority:
http://www.wra.gov.jm/
And here is the link to the NEPA site:
http://www.nepa.gov.jm/
And their link to their marine (sea) water standards:
http://www.nepa.gov.jm/standards/wat...ard_marine.pdf
If you check out these sites as well as the others listed in Our Regulators section of the National Water Commission, you will see that there are many regulations, standards and guidelines that must be followed.
And other than the very few properties that still use a septic tank system (the old Elephant Cesspool trucks that were seen daily are a thing of the past), all the resorts and hotels are connected to the new sewage system.
