IOU · Mississippi · EIA 12686
Mississippi Power Co
IOU · Mississippi · 192K customers. According to the U.S. Energy Information Administration's EIA Form 861, reliability for 2023 shows SAIDI 246 minutes/customer.
Reliability verdict
Mississippi Power Co shows above-average chronic reliability in 2023: 82 minutes SAIDI excluding major events (246 minutes including them) across 192K customers.
- 246 min
- SAIDI 2023
- 1.07
- SAIFI 2023
- 82 min
- SAIDI ex-MED
- 192K
- Customers
Chronic reliability judged on SAIDI excluding major event days when reported (IEEE 1366). Source: EIA Form 861 · August 2026.
Signature read: mid-cohort SAIDI between the 96 and 258 minute tercile cuts.
What mid-pack Mississippi Power Co filings show
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.
Based on this utility's own EIA Form 861 reliability record -- baseline (major-event- excluded) outage duration, total outage duration, and outage frequency -- each benchmarked against every reporting utility nationwide. Not a measure of electricity rates or customer service, which this portal does not track.
246 min/year per customer
Minutes without power per year (2023)
SAIDI by year (2020-2023)
Minutes per customer-year · EIA Form 861
Year-by-year SAIDI for Mississippi Power Co from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.
Mississippi Power Co SAIDI trend
Mississippi Power Co vs the nationwide SAIDI distribution
Where this utility's headline SAIDI sits among every EIA Form 861 utility with a reported figure
246 Around the middle fewer outage minutes than 35% of 911 utilities
Utilities nationwide, banded by latest reported SAIDI (minutes)
Each bar is a band; taller bars hold more utilities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source U.S. EIA Form 861 reliability filings · August 2026
Price vs. reliability
Where Mississippi Power Co sits on price vs. reliability
Among the 781 U.S. utilities large enough to report both revenue per customer and a recent outage record, Mississippi Power Co charges more per customer than 97% of them, and is more reliable (lower SAIDI) than 38% of them, placing it in the quadrant where it pays more but is LESS reliable, a premium price without a reliability payoff. Revenue per customer and outage minutes are independent figures: paying more does not guarantee fewer outages.
Revenue per customer: $5,022/year · Latest SAIDI: 245.5 minutes/year.
SAIDI 2023 breakdown: 245.5 minutes
Reliability Trend (2020–2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 1779.5 | 86.8 | 1.950 | 188,022 |
| 2021 | 354.6 | 81.8 | 1.650 | 191,082 |
| 2022 | 100.1 | 78.1 | 1.080 | 191,082 |
| 2023 | 245.5 | 82.1 | 1.068 | 191,336 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Service Area
Mississippi Power Co serves 94 ZIP codes in Mississippi.
Frequently Asked Questions
How reliable is Mississippi Power Co?
Mississippi Power Co had a SAIDI of 245.5 minutes in 2023 including major weather events, but 82.1 minutes excluding them (the industry-standard measure of routine reliability, so the gap traces back to a major storm that year, not a chronic issue). Leaving aside major weather events, that figure comes in under the national average, pointing to above-average reliability.
What type of utility is Mississippi Power Co?
Mississippi Power Co is classified as a IOU serving Mississippi.
How many customers does Mississippi Power Co serve?
Mississippi Power Co serves approximately 191,692 customers in Mississippi.
How has Mississippi Power Co's reliability changed over time?
Mississippi Power Co has 4 years of reliability data (2020-2023). This utility's SAIDI has stayed fairly flat over the period. Review the trend table above for year-by-year detail.
Utility Profile
- Type
- IOU
- State
- Mississippi
- Customers
- 191,692
- Annual Revenue
- $0.96B
- EIA ID
- 12686
Explore
Utilities with similar EIA profiles
Two cross-state peer sets for Mississippi Power Co. Same-state SAIDI neighbors stay in Read-with below; these neighborhoods are nearest other-state utilities with at least 10,000 reported customers.
Similar customer count
Nearest utilities by Form 861 customers (192K here), outside Mississippi.
Similar chronic SAIDI
Nearest utilities by latest SAIDI minutes (245.5 here), outside Mississippi, excluding the customer-peer set.
Source: U.S. Energy Information Administration Form 861 annual electric power industry survey · ZIP service territory: OpenEI. Disclaimer: informational only, not professional advice. See full disclaimer · methodology.