County annual report · FIPS 17131
2020 Mercer County, IL Power Outage Report
In 2020, customers in Mercer County, IL went without power for an average of 14.8 hours, a total of 132K customer-hours (Illinois average 5.9 hours). That ranks 8th worst of 102 Illinois counties and 569th 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 Mercer 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 | July 19, 2020 14:00 | July 20, 2020 15:45 | 1d 1h | 2,186 | 13K |
| 2 | November 10, 2020 20:00 | November 12, 2020 05:45 | 1d 9h | 2,044 | 29K |
| 3 | October 30, 2020 05:15 | October 30, 2020 13:00 | 7h 45m | 1,525 | 8,390 |
| 4 | July 9, 2020 19:45 | July 10, 2020 09:15 | 13h 30m | 1,396 | 2,612 |
| 5 | May 26, 2020 23:30 | May 27, 2020 01:45 | 2h 15m | 1,282 | 2,885 |
| 6 | June 9, 2020 19:45 | June 10, 2020 07:45 | 12h | 1,128 | 2,754 |
| 7 | August 10, 2020 18:30 | August 16, 2020 21:45 | 6d 3h | 921 | 46K |
| 8 | September 8, 2020 06:45 | September 8, 2020 11:45 | 5h | 742 | 2,288 |
| 9 | April 4, 2020 12:30 | April 4, 2020 13:45 | 1h 15m | 689 | 579 |
| 10 | April 17, 2020 10:00 | April 17, 2020 15:00 | 5h | 587 | 1,341 |
Outage episodes by size in 2020: 32 reached 100+ customers, 6 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 Mercer 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 |
| MidAmerican Energy Co | 2020 | 18.3 hrs | 1.43 | 82 min | 0.79 |
| Ameren | - | - | - | - | - |
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 ÷ 8,972 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. Mercer County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Mercer 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/mercer-county