http://www.nepa.gov.jm/symposia_03/Policies/BeachPolicyforJamaica-November2000.pdf
"b. Sewage Pollution
The disposal of domestic waste into coastal waters is a significant factor affecting
the marine environment. A large number of coastal communities lack basic sewage
treatment facilities and therefore discharge nutrient-rich sewage into the sea.
Sewage effluent standards exist and will soon be promulgated into law.
The National Water Commission has the main responsibility for the collection,
treatment and disposal of sewage, and the operation and maintenance of sewage
treatment plants in Jamaica. Over the last three years, the NWC has established
collection and treatment systems in three major resort areas and there is
currently a proposal for an expanded municipal sewerage system for the Kingston
Metropolitan Area. The difficulty, however, is that very few households and small
commercial operations have connected to the new systems due to the high cost of
connection. Older plants owned by the NWC have not been properly maintained,
26
but there is a proposal to rehabilitate all the sewage treatment plants and bring
them into harmony with the design specification standards.
Other agencies owning and operating sewage treatment plants have failed to
maintain them over the years and have also contributed significantly to the
pollution of the marine environment.
The high cost of installing treatment plants, and the difficulties of maintaining
them in good operational condition, have led to many coastal properties relying on
soak away pits for sewage disposal. The problem is further compounded in that
most of these properties are situated on porous limestone bedrock, with the result
that sewage disposal systems frequently leach nutrients and sometimes bacteria
into the adjacent coastal water.
The NRCA and the local health departments have the responsibility to undertake
regular monitoring of sewage treatment plants"
OK that was just one quote from the document i linked above,
this was 2000 I wonder what has been done since?