County annual report · FIPS 47113
2021 Madison County, TN Power Outage Report
In 2021, customers in Madison County, TN went without power for an average of 4.7 hours, a total of 290K customer-hours (Tennessee average 3.7 hours). That ranks 29th worst of 84 Tennessee counties and 1382nd of 2,974 nationally.
Compared with TN, the US and 2020
Coverage line is EAGLE-I's share of Tennessee customers tracked each year.
Biggest outages in Madison County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | May 6, 2021 12:30 | May 8, 2021 02:45 | 1d 14h | 15,763 | 68K |
| 2 | August 1, 2021 03:30 | August 2, 2021 19:30 | 1d 16h | 7,758 | 39K |
| 3 | May 9, 2021 22:45 | May 11, 2021 00:30 | 1d 1h | 3,480 | 3,138 |
| 4 | June 12, 2021 00:30 | June 12, 2021 02:30 | 2h | 3,476 | 2,572 |
| 5 | September 7, 2021 19:00 | September 8, 2021 00:15 | 5h 15m | 3,270 | 4,228 |
| 6 | April 9, 2021 11:45 | April 10, 2021 02:30 | 14h 45m | 2,937 | 3,114 |
| 7 | October 16, 2021 20:45 | October 17, 2021 10:45 | 14h | 2,658 | 12K |
| 8 | December 15, 2021 14:30 | December 16, 2021 13:00 | 22h 30m | 2,632 | 6,619 |
| 9 | October 9, 2021 11:00 | October 9, 2021 13:45 | 2h 45m | 2,237 | 2,757 |
| 10 | June 12, 2021 16:45 | June 13, 2021 04:45 | 12h | 2,086 | 9,389 |
Outage episodes by size in 2021: 128 reached 100+ customers, 24 reached 1,000+ customers, 1 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Madison County reported on EIA Form 861 for 2021, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Gibson Electric Members Corp | 2021 | 16.0 hrs | 3.56 | 2.2 hrs | 3.56 |
| City of Milan - (TN) | 2021 | 3.8 hrs | 1.94 | - | - |
| City of Jackson - (TN) | 2021 | 14 min | 0.09 | 12 min | 0.08 |
| Southwest Tennessee E M C | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 73% of Tennessee's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 61,454 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Madison County has data for 2016–2025.
Cite this report
MassOutage (massoutage.com), Madison County, TN annual power outage report, 2021, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2021/tennessee/madison-county