County annual report · FIPS 17003
2021 Alexander County, IL Power Outage Report
In 2021, customers in Alexander County, IL went without power for an average of 2.7 hours, a total of 7,672 customer-hours (Illinois average 2.3 hours). That ranks 50th worst of 102 Illinois counties and 1960th of 2,974 nationally.
Compared with IL, the US and 2020
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Alexander 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 | April 29, 2021 10:00 | April 29, 2021 20:45 | 10h 45m | 547 | 1,259 |
| 2 | March 17, 2021 23:15 | March 18, 2021 02:00 | 2h 45m | 546 | 1,313 |
| 3 | April 18, 2021 23:15 | April 19, 2021 02:15 | 3h | 546 | 1,159 |
| 4 | May 9, 2021 12:00 | May 9, 2021 21:15 | 9h 15m | 546 | 1,856 |
| 5 | November 23, 2021 13:45 | November 23, 2021 23:00 | 9h 15m | 531 | 602 |
| 6 | October 3, 2021 16:45 | October 3, 2021 19:15 | 2h 30m | 301 | 382 |
| 7 | May 20, 2021 22:00 | May 21, 2021 00:30 | 2h 30m | 242 | 274 |
| 8 | October 16, 2021 23:30 | October 17, 2021 03:15 | 3h 45m | 131 | 132 |
| 9 | April 27, 2021 00:45 | April 27, 2021 02:15 | 1h 30m | 89 | 113 |
| 10 | March 2, 2021 04:45 | March 2, 2021 11:00 | 6h 15m | 71 | 167 |
Outage episodes by size in 2021: 8 reached 100+ customers, 0 reached 1,000+ customers, 0 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 Alexander 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 |
|---|---|---|---|---|---|
| Ameren Illinois Company | 2021 | 3.2 hrs | 1.11 | 2.0 hrs | 0.88 |
| Southern Illinois Elec Coop | - | - | - | - | - |
| Cairo Public Utility Company | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 98% of Illinois's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 2,842 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. Alexander County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Alexander County, IL 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/illinois/alexander-county