County annual report · FIPS 17155
2021 Putnam County, IL Power Outage Report
In 2021, customers in Putnam County, IL went without power for an average of 9.3 hours, a total of 23K customer-hours (Illinois average 2.3 hours). That ranks 4th worst of 102 Illinois counties and 829th of 2,974 nationally.
Compared with IL, the US and 2020
Coverage line is EAGLE-I's share of Illinois customers tracked each year.
Biggest outages in Putnam County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | August 9, 2021 00:15 | August 9, 2021 07:45 | 7h 30m | 2,361 | 5,573 |
| 2 | February 25, 2021 18:00 | February 25, 2021 21:15 | 3h 15m | 507 | 1,523 |
| 3 | January 21, 2021 19:00 | January 21, 2021 19:30 | 30m | 505 | 253 |
| 4 | December 11, 2021 10:45 | December 11, 2021 17:15 | 6h 30m | 505 | 391 |
| 5 | December 16, 2021 00:45 | December 17, 2021 00:00 | 23h 15m | 436 | 3,037 |
| 6 | January 14, 2021 23:30 | January 15, 2021 07:15 | 7h 45m | 433 | 869 |
| 7 | April 26, 2021 22:15 | April 27, 2021 05:30 | 7h 15m | 378 | 1,167 |
| 8 | August 6, 2021 10:45 | August 6, 2021 12:00 | 1h 15m | 323 | 404 |
| 9 | August 29, 2021 03:45 | August 29, 2021 06:30 | 2h 45m | 278 | 765 |
| 10 | October 29, 2021 02:15 | October 29, 2021 07:15 | 5h | 229 | 1,145 |
Outage episodes by size in 2021: 14 reached 100+ customers, 1 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 Putnam County reported on EIA Form 861 for 2021, 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 | 2021 | 3.2 hrs | 1.11 | 2.0 hrs | 0.88 |
| Corn Belt Energy Corporation | 2021 | 12.3 hrs | 6.64 | 3.7 hrs | 4.71 |
| 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 98% of Illinois's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 2,501 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. Putnam County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Putnam County, IL annual power outage report, 2021, 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/2021/illinois/putnam-county