County annual report · FIPS 17111
2016 McHenry County, IL Power Outage Report
In 2016, customers in McHenry County, IL went without power for an average of 0.5 hours, a total of 57K customer-hours (Illinois average 1.5 hours). That ranks 88th worst of 100 Illinois counties and 2037th of 2,391 nationally.
Compared with IL, the US and 2015
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in McHenry County, 2016
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | June 15, 2016 03:00 | June 16, 2016 08:30 | 1d 5h | 2,911 | 6,014 |
| 2 | April 29, 2016 00:00 | April 29, 2016 04:30 | 4h 30m | 2,119 | 3,155 |
| 3 | February 19, 2016 12:30 | February 21, 2016 05:30 | 1d 17h | 1,803 | 7,895 |
| 4 | May 25, 2016 22:00 | May 26, 2016 10:30 | 12h 30m | 1,073 | 2,027 |
| 5 | March 16, 2016 11:30 | March 17, 2016 22:30 | 1d 11h | 948 | 6,437 |
| 6 | May 9, 2016 20:30 | May 10, 2016 10:00 | 13h 30m | 844 | 577 |
| 7 | May 31, 2016 14:00 | May 31, 2016 20:30 | 6h 30m | 832 | 1,366 |
| 8 | April 3, 2016 17:30 | April 4, 2016 01:30 | 8h | 821 | 1,136 |
| 9 | January 14, 2016 19:00 | January 14, 2016 20:30 | 1h 30m | 599 | 377 |
| 10 | June 5, 2016 18:30 | June 5, 2016 23:30 | 5h | 598 | 942 |
Outage episodes by size in 2016: 41 reached 100+ customers, 4 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 McHenry County reported on EIA Form 861 for 2016, 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 |
|---|---|---|---|---|---|
| Commonwealth Edison Co | 2016 | 1.6 hrs | 0.86 | 63 min | 0.72 |
| Rock Energy Cooperative | - | - | - | - | - |
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 2016; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 120,381 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. McHenry County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), McHenry County, IL annual power outage report, 2016, 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/2016/illinois/mchenry-county