The Associated Press

Reliability metrics


This data package includes energy grid reliability data for 2014 from the U.S. Energy Information Administration.

The data reflects the duration and frequency of outages for the average customer, broken down by utility and state.

It's important to note that the industry continues to measure and report reliaiblity metrics in a variety of ways. This EIA data set centralizes information on utilities that follow emerging standards -- defined by the IEEE -- while also attempting to capture metadata in a consistent fashion for utilities that do not yet follow the IEEE standards.

This data set is intended for research purposes only. For example, a large discrepancy in average outage times when factoring in "major events" such as weather may indicate a system in need of upgrades or better maintenance. Such discrepancies should be the starting point for further inquiries about the local power grid.

Important notes about the data

Download the data

The eia_reliability_2014.xls file can be found in the compressed data package:

Column Definitions

This data set groups utilities based on whether they measure reliability using IEEE standards or some other methodology (blue columns for the former; green columns for the latter).

The data set uses acronyms for two major industry metrics:

SAIDI and SAIFI are further broken down to reflect the inclusion and exclusion of "major event days", or MEDs, as defined by the IEEE.

Major event days occur when outage metrics exceed normal averages for a given day. Such outages can stem from cyber attacks or vandalism, although in practice they're most often caused by hurricanes, snow storms and other types of severe weather.