South Carolina Public Service Authority

What This Utility Data Tells You

South Carolina Public Service Authority is a state utility operating in South Carolina under EIA identifier 17543. It reports service to approximately 209,311 customer accounts and generated about $0.72 billion in annual electric revenue, with a service footprint spanning 12 ZIP codes.

In 2023, the average South Carolina Public Service Authority customer experienced 67.5 minutes of power interruptions, a metric called SAIDI (System Average Interruption Duration Index). That places this utility well below the 120–180 minute national benchmark, signaling strong grid hardening and fast restoration practices. SAIFI, the average number of outage events per customer, was 0.85 for the same period, so customers statistically faced roughly 1 distinct interruption that year. Excluding major event days (hurricanes, ice storms), SAIDI drops to 46.9 minutes, the gap between that figure and the headline 67.5 reveals how much weather, not day-to-day infrastructure, drove outages.

With 4 consecutive years of EIA data (2020–2023), South Carolina Public Service Authority's reliability record can be judged on trend rather than one isolated year. Over that span, SAIDI rose from 48.8 to 67.5 minutes, possibly reflecting tougher weather years or grid upgrades that have not caught up yet.