County annual report · FIPS 17063
2018 Grundy County, IL Power Outage Report
In 2018, customers in Grundy County, IL went without power for an average of 1.6 hours, a total of 68K customer-hours (Illinois average 2.5 hours). That ranks 69th worst of 102 Illinois counties and 2049th of 2,798 nationally.
Compared with IL, the US and 2017
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Grundy County, 2018
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | September 26, 2018 10:00 | September 26, 2018 14:30 | 4h 30m | 3,120 | 1,710 |
| 2 | April 30, 2018 14:00 | May 1, 2018 10:00 | 20h | 1,589 | 1,919 |
| 3 | November 17, 2018 20:00 | November 17, 2018 21:00 | 1h | 1,017 | 1,017 |
| 4 | October 20, 2018 18:30 | October 22, 2018 00:00 | 1d 5h | 973 | 8,856 |
| 5 | November 26, 2018 02:30 | November 29, 2018 22:00 | 3d 19h | 959 | 24K |
| 6 | August 11, 2018 12:00 | August 12, 2018 01:00 | 13h | 671 | 691 |
| 7 | December 15, 2018 16:30 | December 15, 2018 21:30 | 5h | 671 | 349 |
| 8 | May 9, 2018 12:00 | May 9, 2018 16:00 | 4h | 574 | 988 |
| 9 | November 2, 2018 14:30 | November 2, 2018 15:00 | 30m | 535 | 268 |
| 10 | January 11, 2018 17:00 | January 11, 2018 18:30 | 1h 30m | 515 | 290 |
Outage episodes by size in 2018: 44 reached 100+ customers, 3 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 Grundy County reported on EIA Form 861 for 2018, 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 | 2018 | 2.0 hrs | 0.82 | 58 min | 0.70 |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 92% of Illinois's customers in 2018; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 43,433 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. Grundy County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Grundy County, IL annual power outage report, 2018, 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/2018/illinois/grundy-county