State · EIA Form 861 · SC
South Carolina
According to the U.S. Energy Information Administration's EIA Form 861, SAIDI and SAIFI for South Carolina utilities come from the federal annual survey. 24 utilities report reliability metrics; figures are customer-weighted state averages, not a guarantee for any single address.
Signature read: short chronic outage minutes relative to the 51-state Form 861 cohort (<=156 min tercile cut).
EIA Form 861 · Continuity Brief
South Carolina
EIA Form 861 Continuity Brief · August 2026 · IEEE 1366 SAIDI/SAIFI minutes, not a storm forecast.
South Carolina sits in the lower-third SAIDI band at 135.5 minutes across 26 reporting utilities (Greer Commission of Public Wks lowest at 33.8), under the live national mean of 341.
Named SAIDI peers (in-state best + nearest-state averages)
State SAIDI neighbourhood (minutes / customer-year)
- South Carolina 135.5
- Idaho 138.5
- Nevada 138.7
- Minnesota 126.7
- New York 122.0
- Oregon 121.5
Lower is fewer interruption minutes. Neighbours are nearest other-state averages in this corpus.
South Carolina vs all states by EIA Form 861 utility headcount
Where this state's reporting utility count sits among every state in the Form 861 file (coverage density, not reliability quality)
26 Top 27% more reporting utilities than 73% of 51 states
States, banded by electric utilities reporting on EIA Form 861
Each bar is a band; taller bars hold more states. 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 EIA Form 861 · 2026-08-30
Utilities Ranked by Reliability · South Carolina short-outage cohort
All 26 electric utilities in South Carolina with reliability data, sorted by 2023 SAIDI; statewide average sits in the lower-third Form 861 band.
Lowest-SAIDI utilities in South Carolina
Fewest outage minutes · live table sort
Top 10 South Carolina utilities by fewest outage minutes. Lower SAIDI is better - not a quality score beyond interruption duration.
Lowest-SAIDI utilities in South Carolina
| # | Utility | Type | SAIDI 2023 | SAIFI 2023 | Customers |
|---|---|---|---|---|---|
| 1 | Greer Commission of Public Wks | Municipal | 33.8 | 0.48 | 32,896 |
| 2 | City of Rock Hill - (SC) | Municipal | 53.3 | 0.78 | 40,767 |
| 3 | City of Gaffney - (SC) | Municipal | 55.7 | 0.85 | 7,637 |
| 4 | South Carolina Public Service Authority | State | 67.5 | 0.85 | 209,311 |
| 5 | Broad River Electric Coop, Inc | Cooperative | 95.3 | - | 23,947 |
| 6 | York Electric Coop Inc | Cooperative | 96.2 | 0.82 | 69,134 |
| 7 | Easley Combined Utility System | Municipal | 104.9 | 1.33 | 17,011 |
| 8 | Berkeley Electric Coop Inc | Cooperative | 107.9 | 1.19 | 124,282 |
| 9 | Dominion Energy South Carolina, Inc | IOU | 117.5 | 1.48 | 788,721 |
| 10 | Black River Electric Coop, Inc - (SC) | Cooperative | 126.0 | 1.18 | 34,508 |
| 11 | Mid-Carolina Electric Coop Inc | Cooperative | 137.1 | 1.63 | 59,829 |
| 12 | Laurens Electric Coop, Inc | Cooperative | 138.0 | 1.31 | 63,685 |
| 13 | Aiken Electric Coop Inc | Cooperative | 152.7 | - | 51,929 |
| 14 | Horry Electric Coop Inc | Cooperative | 156.0 | 1.54 | 94,537 |
| 15 | Fairfield Electric Coop, Inc | Cooperative | 166.6 | 2.31 | 33,097 |
| 16 | Palmetto Electric Coop Inc | Cooperative | 170.6 | 2.31 | 78,584 |
| 17 | Blue Ridge Electric Coop Inc - (SC) | Cooperative | 180.1 | - | 71,438 |
| 18 | Santee Electric Coop, Inc | Cooperative | 232.6 | - | 44,603 |
| 19 | MPD Electric Cooperative | Cooperative | 258.3 | 2.02 | 38,286 |
| 20 | Newberry Electric Coop, Inc | Cooperative | 271.9 | - | 13,657 |
| 21 | Lynches River Elec Coop, Inc | Cooperative | 332.9 | 2.60 | 22,179 |
| 22 | City of Orangeburg - (SC) | Municipal | 391.9 | 2.40 | 24,524 |
| 23 | Tri-County Electric Coop, Inc (SC) | Cooperative | 427.4 | 3.75 | 18,377 |
| 24 | Edisto Electric Coop, Inc | Cooperative | 453.3 | - | 21,121 |
| 25 | Marlboro Electric Coop, Inc | Cooperative | - | - | - |
| 26 | Pee Dee Electric Coop, Inc | Cooperative | - | - | - |
Nationwide states with similar utility inventory or customer scale
Cross-state peer sets for South Carolina (lower-third SAIDI band). Nearest-SAIDI neighbors stay in Read-with; these neighborhoods compare EIA Form 861 headcount and summed customer accounts.
Similar utility headcount
Nearest states by reporting utility count (26 here).
Similar customer scale
Nearest states by summed customer accounts (2.0M here), excluding the headcount peer set.
Read with this South Carolina roster · short-outage band
- Lowest published SAIDI in South Carolina: Greer Commission of Public Wks (33.8 min)
- Highest published SAIDI in South Carolina: Edisto Electric Coop, Inc (453.3 min)
- Ownership mix here: Cooperative leads (19 of 26 utilities) · national type means
- Nearest avg SAIDI: Idaho (138.5 min)
- Nearest avg SAIDI: Nevada (138.7 min)
- Nearest avg SAIDI: Minnesota (126.7 min)
- Nearest avg SAIDI: New York (122.0 min)
- Nearest avg SAIDI: Oregon (121.5 min)
Source: U.S. Energy Information Administration (EIA) Form 861 Annual Electric Power Industry Report, reliability · 2020-2023 State averages are rebuilt from utility filings in this portal DB; corpus ranks use headcount and customer sums.