County annual report · FIPS 17125
2017 Mason County, IL Power Outage Report
In 2017, customers in Mason County, IL went without power for an average of 0.9 hours, a total of 4,424 customer-hours (Illinois average 1.4 hours). That ranks 59th worst of 102 Illinois counties and 2078th of 2,786 nationally.
Compared with IL, the US and 2016
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Mason County, 2017
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 27, 2017 03:30 | April 27, 2017 07:00 | 3h 30m | 690 | 1,537 |
| 2 | January 12, 2017 14:00 | January 12, 2017 18:30 | 4h 30m | 689 | 1,039 |
| 3 | April 29, 2017 21:00 | April 30, 2017 07:30 | 10h 30m | 84 | 130 |
| 4 | November 19, 2017 02:15 | November 19, 2017 07:00 | 4h 45m | 54 | 256 |
| 5 | December 26, 2017 11:30 | December 26, 2017 14:00 | 2h 30m | 54 | 36 |
| 6 | January 4, 2017 02:45 | January 4, 2017 05:30 | 2h 45m | 52 | 143 |
| 7 | January 18, 2017 16:30 | January 18, 2017 17:15 | 45m | 44 | 23 |
| 8 | December 20, 2017 03:15 | December 20, 2017 07:45 | 4h 30m | 43 | 185 |
| 9 | February 22, 2017 08:45 | February 22, 2017 15:00 | 6h 15m | 40 | 47 |
| 10 | May 11, 2017 00:00 | May 11, 2017 11:45 | 11h 45m | 29 | 245 |
Outage episodes by size in 2017: 2 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 2017, 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 | 2017 | 3.2 hrs | 1.12 | 2.0 hrs | 0.90 |
| Menard Electric Coop | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about n/a of Illinois's customers in 2017; 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, 2017, 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/2017/illinois/mason-county