County annual report · FIPS 17063
2020 Grundy County, IL Power Outage Report
In 2020, customers in Grundy County, IL went without power for an average of 6.1 hours, a total of 264K customer-hours (Illinois average 5.9 hours). That ranks 30th worst of 102 Illinois counties and 1230th 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 Grundy 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 | March 12, 2020 16:00 | March 13, 2020 00:00 | 8h | 4,067 | 1,872 |
| 2 | August 10, 2020 21:15 | August 17, 2020 07:00 | 6d 9h | 3,817 | 218K |
| 3 | April 12, 2020 01:45 | April 12, 2020 04:45 | 3h | 2,104 | 547 |
| 4 | June 27, 2020 01:30 | June 28, 2020 16:30 | 1d 15h | 1,843 | 16K |
| 5 | May 18, 2020 13:45 | May 18, 2020 23:15 | 9h 30m | 1,088 | 1,743 |
| 6 | June 9, 2020 18:30 | June 11, 2020 02:00 | 1d 7h | 1,055 | 3,159 |
| 7 | March 13, 2020 02:45 | March 13, 2020 04:00 | 1h 15m | 929 | 951 |
| 8 | July 19, 2020 13:15 | July 20, 2020 04:30 | 15h 15m | 900 | 5,772 |
| 9 | November 15, 2020 14:00 | November 15, 2020 20:15 | 6h 15m | 590 | 313 |
| 10 | February 14, 2020 08:15 | February 14, 2020 12:00 | 3h 45m | 452 | 511 |
Outage episodes by size in 2020: 28 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 Grundy 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 |
|---|---|---|---|---|---|
| Commonwealth Edison Co | 2020 | 5.7 hrs | 0.83 | 40 min | 0.55 |
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 ÷ 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, 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/grundy-county