Mitigated Negative Declaration

A CEQA document prepared when a project's potentially significant environmental effects can all be reduced to less-than-significant levels through the incorporation of specific mitigation measures.

What is a Mitigated Negative Declaration?

A Mitigated Negative Declaration (MND) is a CEQA environmental document prepared when an Initial Study identifies potentially significant environmental effects, but the project applicant agrees to incorporate mitigation measures that will reduce all impacts to less-than-significant levels. An MND is less costly and time-consuming than a full EIR, making it a preferred outcome for developers when feasible.

MND vs. EIR

The key distinction is whether all significant impacts can be mitigated. If every identified significant impact can be reduced to a less-than-significant level through feasible mitigation measures, an MND is appropriate. If any significant impact remains after mitigation (a significant unavoidable impact), a full EIR is required. The determination of whether an MND or EIR is needed is made through the Initial Study process.

The MND Process

The lead agency prepares an Initial Study evaluating the project's environmental effects across all CEQA topic areas. Where potentially significant effects are identified, mitigation measures are developed and incorporated into the project. The MND is circulated for a 20-30 day public review period. If no substantial evidence of significant unavoidable impacts emerges, the agency adopts the MND and approves the project with the mitigation measures as conditions of approval.

MND and Project Timelines

An MND typically takes 3-6 months to prepare and process — significantly faster than an EIR. However, MNDs are still subject to legal challenge if opponents believe that the project's impacts are more significant than the MND concludes. The risk of a successful challenge is highest when the Initial Study's conclusions are debatable.