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III. Outage Causes <br />Equipment failure, extreme weather events, wildlife, and vegetation are some of the most <br />common causes of electric system outages. The following pie chart shows the percentages of <br />the primary causes of outages for all utilities using the eReliability Tracker in 2024. <br />Vdeather -"v <br />19.3°/a <br />Equipment <br />21.2% <br />VVildlife 16.4% <br />0.7% Utility Human Error <br />1.2% Power Supply <br />4.4% <br />Public <br />9.7% <br />16.2% Unknown <br />11.0% <br />Vegetation <br />r <br />Scheduled <br />Figure 8. Primary causes of outages in 2024 <br />Certain factors, such as regional weather and animal/vegetation patterns, can make some <br />bajnm.Ep 6rAiptiEel-Ehefotlevftisection includes graphs <br />depicting common causes of outages for your utility, all utilities in your region, and all utilities <br />using the eReliability Tracker. <br />@ifwi es: rmtaining aggregate information are customer -weighted to account for di <br />utility size for a better analytical comparison. For example, a particularly large utility may have <br />a large number of outages compared to a small utility. To avoid skewing the data toward large <br />utilities, the number of cause occurrences is divided by customer size to account for the <br />€fi-ences. In Figures 9 to 14, the data represent the number of occurrences for each group <br />190 <br />