County annual report · FIPS 17189
2018 Washington County, IL Power Outage Report
In 2018, customers in Washington County, IL went without power for an average of 12.4 hours, a total of 90K customer-hours (Illinois average 2.5 hours). That ranks 5th worst of 102 Illinois counties and 451st 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 Washington 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 | May 31, 2018 12:15 | June 2, 2018 04:15 | 1d 16h | 2,317 | 13K |
| 2 | June 28, 2018 23:30 | July 2, 2018 12:45 | 3d 13h | 1,964 | 36K |
| 3 | June 26, 2018 09:30 | June 28, 2018 17:30 | 2d 8h | 1,445 | 3,303 |
| 4 | March 27, 2018 05:00 | March 27, 2018 10:45 | 5h 45m | 1,335 | 6,437 |
| 5 | March 26, 2018 15:00 | March 26, 2018 17:00 | 2h | 1,263 | 318 |
| 6 | April 8, 2018 21:00 | April 9, 2018 00:00 | 3h | 1,042 | 373 |
| 7 | August 29, 2018 19:15 | August 29, 2018 21:45 | 2h 30m | 978 | 1,105 |
| 8 | June 2, 2018 16:15 | June 3, 2018 11:30 | 19h 15m | 764 | 3,140 |
| 9 | May 5, 2018 00:30 | May 5, 2018 10:45 | 10h 15m | 701 | 1,060 |
| 10 | May 3, 2018 11:15 | May 3, 2018 23:30 | 12h 15m | 700 | 2,169 |
Outage episodes by size in 2018: 38 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 Washington 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 |
|---|---|---|---|---|---|
| Ameren Illinois Company | 2018 | 3.5 hrs | 1.06 | 1.8 hrs | 0.90 |
| Tri-County Electric Coop, Inc (IL) | 2018 | 4.7 hrs | 1.74 | 83 min | 0.81 |
| Ameren | - | - | - | - | - |
| Egyptian Electric Coop Assn | - | - | - | - | - |
| Clinton County Elec Coop, Inc | - | - | - | - | - |
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 ÷ 7,318 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. Washington County has data for 2015–2025.
Cite this report
MassOutage (massoutage.com), Washington 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/washington-county