Understanding marine pollution and the contamination of coastal environments requires knowledge from a variety of scientific fields. Marine Environmental Quality promotes a multidisciplinary approach to investigations, drawing on not only natural sciences, but also applied mathematics and social sciences. The investigations in this book focus on both organic and inorganic pollutants, firstly in a study conducted in the city of La Rochelle, on the North Atlantic French coast, then expanding the areas under examination to regions of English and Portuguese waters and, lastly, to the Mediterranean Sea. The improvement such research can bring to biomarkers, models and experiments enables equal progress in the quality of seawater in ports and protected areas of coastal regions. The eight chapters of Marine Environmental Quality present many aspects of this research, including experiments with floating barriers, water governance in various areas, sampling sites and sentinel species that act as biomarkers in harbors. Also covered are environmental commitments, both international and local, the risk that marine contamination poses to human health, experimental designs for interactions with microplastics and a study biomonitoring the juveniles of sentinel species. Such results will bring many benefits, to human health, to economic inclusion and to regional development. Contents 1. Oil Spill Boom Strategy for Local Authorities Facing Coastal and Harbor Pollutions: A Survey of the European Research Project ISDAMP+, Frédéric Muttin and Rose Campbell. 2. Governance and Public Policies of Coastal Water Quality in the Pertuis Charentais, Alice Mazeaud, François Bénitez, Anaïs Ridel, Arno Bringer, Christine Plumejeaud, Pascal Brunello, Adélaïde Lerebours, Yann Rabuteau and Hélène Thomas. 3. Comparative Biomarkers Study in Two Scallop Organs to Establish Guidelines for Evaluating French Atlantic Coastline Water Quality, Marine Paomia Breitwieser, Marine Barbarin, Valérie Huet, Emmanuel Dubillot, Marianne Graber and Hélène Thomas. 4. Tracer Study and Mimachlamys varia Bivalve Tools, a Multidisciplinary Guideline to Assess Environmental Quality in the La Rochelle Harbor Over Three Years, Marine Paomia Breitwieser, Benoit Simon-Bouhet, Jean-Rémy Huguet, Valérie Huet, Carine Churlaud, Marine Barbarin, Angélique Fontanaud and Hélène Thomas. 5. ISDAMP Project Dissemination and Continuation for Local Authorities’ Oil Spill Preparedness, Frédéric Muttin and Rose Campbell. 6. Environmental Quality of Coastal Areas in the Mediterranean Sea and Potential Risks to Human Health, Marion Pillet, Michel Marengo, Sylvie Gobert, Pierre Lejeune, Michèle Leduc, Lovina Fullgrabe, Stéphane Le Floch and Hélène Thomas. 7. Possible Interactions Between Environmental Microplastics, Copepods (Tigriopus brevicornis) and Oysters (Crassostrea gigas) in the Pertuis Charentais Sea, Arno Bringer, Emmanuel Dubillot, Grégoire Prunier and Hélène Thomas. 8. Health Assessment of Juvenile Scallops in the La Rochelle Harbor, Marine Paomia Breitwieser, Marine Barbarin, Angélique Fontanaud and Hélène Thomas.