Environmental Impact Report [EIR] Law and Legal Definition

An Environmental Impact Report (EIR) refers to the assessment of all possible impacts that a land development or construction project may cause on the environment in a particular area. It includes population, traffic, schools, fire protection, endangered species, archeological artifacts, and community beauty. Local governments require EIR for approving a development or construction project. An EIR must be prepared if there is substantial evidence that the project may have a significant effect on the environment. Findings and approval of the department on EIR is known as negative declaration.