Dominion Energy South Carolina, Inc

What This Utility Data Tells You

Dominion Energy South Carolina, Inc is an investor-owned utility operating in South Carolina under EIA identifier 17539. It reports service to approximately 788,721 customer accounts and generated about $2.41 billion in annual electric revenue, with a service footprint spanning 240 ZIP codes. Because it is investor-owned, the state public utility commission oversees its rate cases and reliability performance rather than a local board.

In 2023, the average Dominion Energy South Carolina, Inc customer experienced 117.5 minutes of power interruptions, a measure known as SAIDI, or 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 1.48 for the same period, so customers statistically faced roughly 1 distinct interruption that year. Excluding major event days (hurricanes, ice storms), SAIDI drops to 89.9 minutes, the gap between that figure and the headline 117.5 reveals how much weather, not day-to-day infrastructure, drove outages.

With 4 consecutive years of EIA data (2020–2023), Dominion Energy South Carolina, Inc's reliability record can be judged on trend rather than one isolated year. SAIDI has improved from 141.3 to 117.5 minutes over that window, a meaningful direction for prospective customers and regulators watching capital investment outcomes.