The Environmental Investigation Section (EIS) mission is to protect the public health and natural resources in a professional manner, utilizing proactive methods, teamwork and partnerships, delivering prompt, high quality and thorough investigations of suspected violations of environmental laws. The EIS strives to be a key component of Michigan's law enforcement mainstream, consistently solving complex violations of environmental laws, and providing a resource for local communities faced with environmental conflicts of a criminal nature.

The EIS serves as the investigative and law enforcement specialist for the Michigan Department of Environment, Great Lakes, and Energy (EGLE). This includes conducting, supervising, and coordinating criminal, civil, and administrative investigations into suspected violations of Michigan's environmental statutes and cooperating with other divisions, departments, and agencies.

The section is comprised of specially trained Conservation Officers who determine appropriate regulations, initiate legal actions, and represent the department in negotiations for restitution, penalties and damages. The EIS conducts training to help local law enforcement officers and other enforcement personnel to develop community partnerships to combat illegal dumping at the local level. There are two units within this section: South Eastern and North Western.