Power outages in Johnston, SC
Live outages for Johnston and the surrounding area, updated every 10 minutes. Johnston has 2,233 residents.
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No live outage data for Johnston yet.
Outage map
JohnstonEdgefield County
Outage history in Edgefield County, which includes Johnston
2014–2025 recordEdgefield County averaged 44.3 significant outages a year in 2023–2025, about typical for South Carolina counties.
In the 12 months to December 2025, there were 51. Half were over within 1.5 hours; the longest lasted 20 hours, starting January 11, 2025.
The largest on record began September 27, 2024, with 13,969 customers out at once.
44.3significant outages a year (2023–2025)
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At least 1% of the area's customers, and at least 100, without power at the same time. Outages less than 6 hours apart count as one.1.5 hourstypical (median) length
i
Half of significant outages here ended sooner than this, and half lasted longer.14 dayslongest on record (September 2024)
13,969most customers out at once
| Largest events (start) | Peak out | LastediHow long this area stayed at or above the significant-outage line, not how long any one home was without power. | Customer-hoursiCustomers out multiplied by hours out, added up over the event. 1,000 customers out for 3 hours is 3,000 customer-hours. |
|---|---|---|---|
| September 27, 2024 | 13,969 | 14 days | 2,364,384 |
| June 8, 2025 | 6,362 | 16 hours | 19,528 |
| May 20, 2022 | 4,610 | 9 hours | 10,130 |
| July 21, 2023 | 4,367 | 12 hours | 13,383 |
| September 11, 2017 | 3,991 | 1.6 days | 42,563 |
Recorded outages from EAGLE-I, Oak Ridge National Laboratory (CC BY 4.0).i
From EAGLE-I, Oak Ridge National Laboratory's record of utility outage data every 15 minutes since 2014 (CC BY 4.0). It covered about 9 in 10 U.S. customers.