State · South Carolina · EIA 17543
South Carolina Public Service Authority
State · South Carolina · 209K customers. According to the U.S. Energy Information Administration's EIA Form 861, reliability for 2023 shows SAIDI 67 minutes/customer.
Reliability verdict
South Carolina Public Service Authority shows above-average chronic reliability in 2023: 47 minutes SAIDI excluding major events across 209K customers.
- 67 min
- SAIDI 2023
- 0.85
- SAIFI 2023
- 47 min
- SAIDI ex-MED
- 209K
- Customers
Chronic reliability judged on SAIDI excluding major event days when reported (IEEE 1366). Source: EIA Form 861 · August 2026.
Signature read: short interruption minutes vs the 911 utility cohort (≤96 min tercile cut).
What short-outage South Carolina Public Service Authority filings show
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.
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.
67 outage minutes per customer annually
Minutes without power per year (2023)
SAIDI by year (2020-2023)
Minutes per customer-year · EIA Form 861
Year-by-year SAIDI for South Carolina Public Service Authority from the same EIA filings as the table below. Lower is better; major-event years can spike the headline figure.
South Carolina Public Service Authority SAIDI trend
South Carolina Public Service Authority vs the nationwide SAIDI distribution
Where this utility's headline SAIDI sits among every EIA Form 861 utility with a reported figure
67 Among the lowest fewer outage minutes than 76% 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 South Carolina Public Service Authority sits on price vs. reliability
Among the 781 U.S. utilities large enough to report both revenue per customer and a recent outage record, South Carolina Public Service Authority charges more per customer than 87% of them, and is more reliable (lower SAIDI) than 79% of them, placing it in the quadrant where it pays more and is more reliable. Revenue per customer and outage minutes are independent figures: paying more does not guarantee fewer outages.
Revenue per customer: $3,422/year · Latest SAIDI: 67.5 minutes/year.
SAIDI 2023 breakdown: 67.5 minutes
Reliability Trend (2020–2023)
| Year | SAIDI (min) | SAIDI nMED | SAIFI | Customers |
|---|---|---|---|---|
| 2020 | 48.8 | 23.9 | 0.605 | 188,318 |
| 2021 | 132.9 | 18.9 | 0.787 | 184,242 |
| 2022 | 219.6 | 23.7 | 1.234 | 198,193 |
| 2023 | 67.5 | 46.9 | 0.849 | 205,216 |
SAIDI nMED = SAIDI without major event days. Source: EIA Form 861.
Service Area
South Carolina Public Service Authority serves 12 ZIP codes in South Carolina.
Frequently Asked Questions
How reliable is South Carolina Public Service Authority?
South Carolina Public Service Authority had a SAIDI of 67.5 minutes in 2023. Excluding major storm impacts, this beats the national average, a sign of above-average reliability.
What type of utility is South Carolina Public Service Authority?
South Carolina Public Service Authority is classified as a State serving South Carolina.
How many customers does South Carolina Public Service Authority serve?
South Carolina Public Service Authority serves approximately 209,311 customers in South Carolina.
How has South Carolina Public Service Authority's reliability changed over time?
South Carolina Public Service Authority has 4 years of reliability data (2020-2023). SAIDI has held roughly steady across these years. Review the trend table above for year-by-year detail.
Utility Profile
- Type
- State
- State
- South Carolina
- Customers
- 209,311
- Annual Revenue
- $0.72B
- EIA ID
- 17543
Explore
Utilities with similar EIA profiles
Two cross-state peer sets for South Carolina Public Service Authority. 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 (209K here), outside South Carolina.
Similar chronic SAIDI
Nearest utilities by latest SAIDI minutes (67.5 here), outside South Carolina, 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.