County annual report · FIPS 19075
2018 Grundy County, IA Power Outage Report
In 2018, customers in Grundy County, IA went without power for an average of 1.6 hours, a total of 8,547 customer-hours (Iowa average 2.2 hours). That ranks 69th worst of 99 Iowa counties and 2063rd of 2,798 nationally.
Compared with IA, the US and 2017
Coverage line is EAGLE-I's share of Iowa 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 | August 28, 2018 05:30 | August 28, 2018 08:00 | 2h 30m | 1,288 | 3,220 |
| 2 | November 2, 2018 20:30 | November 2, 2018 21:30 | 1h | 763 | 763 |
| 3 | January 6, 2018 09:15 | January 6, 2018 10:45 | 1h 30m | 455 | 683 |
| 4 | September 18, 2018 14:30 | September 18, 2018 17:00 | 2h 30m | 307 | 309 |
| 5 | September 21, 2018 12:15 | September 21, 2018 13:15 | 1h | 306 | 306 |
| 6 | June 19, 2018 02:45 | June 19, 2018 04:30 | 1h 45m | 275 | 481 |
| 7 | October 18, 2018 23:45 | October 19, 2018 01:15 | 1h 30m | 228 | 342 |
| 8 | March 24, 2018 05:15 | March 24, 2018 19:00 | 13h 45m | 217 | 1,718 |
| 9 | April 6, 2018 15:30 | April 6, 2018 16:15 | 45m | 62 | 47 |
| 10 | September 13, 2018 13:45 | September 13, 2018 15:00 | 1h 15m | 61 | 31 |
Outage episodes by size in 2018: 8 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 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 |
|---|---|---|---|---|---|
| Interstate Power and Light Co | - | - | - | - | - |
| Alliant Energy (Interstate Power & Light) | - | - | - | - | - |
| Midland Power Coop | - | - | - | - | - |
| Grundy County Rural Elec Coop | - | - | - | - | - |
| Cedar Falls Utilities | - | - | - | - | - |
| City of Dike | - | - | - | - | - |
| Grundy Center Mun Light & Power | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 89% of Iowa's customers in 2018; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 5,507 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, IA 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/). https://massoutage.com/reports/2018/iowa/grundy-county