Contamination level by PCB, organochlorines pesticides and mercury for Anadara tuberculosa and other species at Punta Morales, Puerto Alto and Jicaral during 2 sampling periods in 1988. The data were digitized by VLIZ from the original report: de la Cruz, E. (1989). Organochlorine and total mercury in the Anadara tuberculosa bivalve and other species from the Nicoya Gulf, Costa Rica. MSc Thesis. KBIN: Brussel. 59 pp.