The present document was prepared with the co-operation of the participants attending the workshop on Environmental Quality Criteria and Effluent Guidelines convened in San Juan, Puerto Rico, 5-15 November 1990. The document consists of a compilation of the environmental quality criteria and primary and secondary standards currently in existence in countries of the region that sent in data pertinent to the coastal and marine zones of their respective interest. It includes a brief discussion of the advantages, feasibility, desirability and applicability of those standards.