Mississippi Power Co

What This Utility Data Tells You

Mississippi Power Co is an investor-owned utility operating in Mississippi under EIA identifier 12686. It reports service to approximately 191,692 customer accounts and generated about $0.96 billion in annual electric revenue, with a service footprint spanning 94 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 Mississippi Power Co customer experienced 245.5 minutes of power interruptions, a measure known as SAIDI, or System Average Interruption Duration Index. Excluding major weather events from that total, that is comfortably under the 120–180 minute national benchmark range, a sign of solid grid resilience and quick outage response. The SAIFI figure, which tracks average outage events per customer, came in at 1.07 for the same period, meaning customers statistically saw about 1 distinct interruption that year. Strip out major event days (hurricanes, ice storms) and SAIDI falls to 82.1 minutes; the difference from the headline 245.5 shows how much of the outage total came from weather rather than everyday grid issues.

With 4 consecutive years of EIA data (2020–2023), Mississippi Power Co's reliability record can be judged on trend rather than one isolated year. Over that window, SAIDI moved from 1779.5 down to 245.5 minutes, a trend worth noting for anyone weighing capital investment outcomes. Note: this figure is unusually low compared to typical U.S. utility performance and may reflect an incomplete EIA filing for this year rather than a genuine reliability improvement -- treat with caution and cross-check against Mississippi Power Co's other reported years.