County annual report · FIPS 17131
2015 Mercer County, IL Power Outage Report
In 2015, customers in Mercer County, IL went without power for an average of 13.6 hours, a total of 122K customer-hours (Illinois average 2.3 hours). That ranks 7th worst of 100 Illinois counties and 186th of 2,484 nationally.
Compared with IL, the US
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Mercer County, 2015
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | October 22, 2015 23:15 | October 23, 2015 02:00 | 2h 45m | 6,308 | 12K |
| 2 | December 28, 2015 10:30 | December 31, 2015 00:15 | 2d 13h | 5,927 | 66K |
| 3 | November 21, 2015 02:45 | November 22, 2015 14:00 | 1d 11h | 4,307 | 14K |
| 4 | July 11, 2015 15:00 | July 19, 2015 01:45 | 7d 10h | 1,243 | 3,249 |
| 5 | September 26, 2015 05:45 | September 26, 2015 16:15 | 10h 30m | 1,234 | 2,631 |
| 6 | November 8, 2015 22:15 | November 9, 2015 06:30 | 8h 15m | 1,105 | 5,610 |
| 7 | December 13, 2015 18:15 | December 13, 2015 20:45 | 2h 30m | 1,076 | 914 |
| 8 | May 9, 2015 02:45 | May 9, 2015 06:15 | 3h 30m | 949 | 3,143 |
| 9 | November 7, 2015 16:45 | November 7, 2015 19:30 | 2h 45m | 828 | 1,087 |
| 10 | November 20, 2015 13:00 | November 20, 2015 14:45 | 1h 45m | 573 | 302 |
Outage episodes by size in 2015: 23 reached 100+ customers, 7 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 2015, 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 | 2015 | 5.9 hrs | 1.39 | 2.2 hrs | 1.04 |
| MidAmerican Energy Co | 2015 | 2.2 hrs | 1.05 | 87 min | 0.88 |
| 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 n/a of Illinois's customers in 2015; 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, 2015, 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/2015/illinois/mercer-county