County annual report · FIPS 17125
2020 Mason County, IL Power Outage Report
In 2020, customers in Mason County, IL went without power for an average of 1.5 hours, a total of 7,398 customer-hours (Illinois average 5.9 hours). That ranks 85th worst of 102 Illinois counties and 2457th of 3,019 nationally.
Compared with IL, the US and 2019
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Mason County, 2020
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 18, 2020 01:00 | January 18, 2020 03:15 | 2h 15m | 453 | 952 |
| 2 | March 3, 2020 20:45 | March 3, 2020 22:15 | 1h 30m | 452 | 576 |
| 3 | August 10, 2020 20:15 | August 11, 2020 18:00 | 21h 45m | 437 | 1,550 |
| 4 | April 8, 2020 22:00 | April 9, 2020 08:30 | 10h 30m | 419 | 794 |
| 5 | May 4, 2020 15:00 | May 4, 2020 23:30 | 8h 30m | 310 | 103 |
| 6 | April 3, 2020 22:15 | April 4, 2020 07:00 | 8h 45m | 109 | 214 |
| 7 | December 23, 2020 20:15 | December 23, 2020 22:30 | 2h 15m | 99 | 172 |
| 8 | March 14, 2020 18:30 | March 14, 2020 21:00 | 2h 30m | 94 | 119 |
| 9 | March 12, 2020 13:45 | March 12, 2020 19:30 | 5h 45m | 85 | 113 |
| 10 | February 14, 2020 09:30 | February 14, 2020 18:15 | 8h 45m | 84 | 203 |
Outage episodes by size in 2020: 6 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 Mason County reported on EIA Form 861 for 2020, 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 | 2020 | 3.7 hrs | 1.04 | 1.7 hrs | 0.82 |
| Menard Electric Coop | 2020 | 2.5 hrs | 1.72 | 2.1 hrs | 1.61 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 94% of Illinois's customers in 2020; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 4,847 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. Mason County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Mason County, IL annual power outage report, 2020, 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/2020/illinois/mason-county