The objective of this study is to examine how environmental crimes are classified within the EU criminal justice system, in response to the growing environmental degradation and to support the achievement of the Sustainable Development Goals (SDGs). A multifaceted methodological approach was utilized, incorporating legal analysis, comparative studies, expert interviews, and quantitative data evaluation. The results indicate that Germany and the Netherlands possess strong legislative standards and efficient oversight systems, whereas nations such as Greece and Portugal encounter difficulties in regulation. The most common environmental offenses are illegal waste disposal (35%) and air pollution (26%). It is suggested that legal reforms be implemented to align practices across the EU. The research highlights the need for legal reforms and better alignment between national and EU regulations to increase the consistency and effectiveness of identifying environmental crimes.