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Assessments & Trends: Reliability Assessments


NERC regularly publishes reports that assess the reliability of the North American bulk electric system.

  1. Long-Term Reliability Assessments annually assess the adequacy of the bulk electric system in the United States and Canada over a ten-year period. The report projects electricity supply and demand, evaluates transmission system adequacy, and discusses key issues and trends that could affect reliability.

  2. Summer and Winter Assessments assess the adequacy of electricity supplies in the United States and Canada for the upcoming summer and winter peak demand periods.  

  3. Special Assessments are conducted on a regional, interregional, or interconnection-wide basis as needed.


Long-Term Reliability Assessments

Summer Assessments

Winter Assessments

Special Assessments

Survey of Reliability Issues