National Environmental Policy Act of 1970
Enacted 1970
Requires federal agencies to assess environmental impacts of proposed actions before making decisions, establishing the Environmental Impact Statement (EIS) process.
Key Metrics
EIS Documents (Annual)
~170
EPA EIS Database
Environmental Assessments
50,000+/yr
CEQ Annual Reports
Average EIS Completion Time
4.5 years
CEQ Statistics
Countries with Similar Laws
170+
UNEP
Environmental Consulting Jobs
200,000+
BLS
Economic Impact
Federal agencies complete approximately 170 EIS documents and over 50,000 environmental assessments annually. The average EIS takes 4.5 years and costs $2-8 million to complete. NEPA review has prevented an estimated $100+ billion in environmental damage over its lifetime. The environmental consulting industry, largely driven by NEPA compliance, employs over 200,000 professionals.
Social Impact
NEPA established public participation requirements that have enabled citizen engagement in over 1 million federal decisions. The Act has been replicated by 170 countries and over 30 states with their own environmental review laws. NEPA reviews have blocked or modified thousands of projects that would have harmed disadvantaged communities, becoming an early tool for environmental justice.
Enforcement Statistics
Over 150 NEPA cases are filed in federal court annually. Courts have issued injunctions halting projects in approximately 25% of challenged cases. CEQ regulations have been updated multiple times, most recently in 2024. NEPA litigation has been a primary mechanism for environmental advocacy organizations.
Key Findings
- 1.Enabled public participation in over 1 million federal environmental decisions
- 2.Replicated by 170 countries and 30+ states with mini-NEPA laws
- 3.Average EIS completion has grown to 4.5 years, prompting reform efforts
- 4.Environmental consulting industry employs over 200,000 professionals