Johnson County, Illinois Power Outages, 2015 to 2023

Johnson County, Illinois had 4 major outages from 2015 to 2023

Lower outage time among US counties

Residents here averaged 0.33 times the US outage time per person and 0.77 times the Illinois rate. It ranks 70 of 95 in the state, where 1 has the most. Data confidence: High, with 9 years of records.

0.4major outages per year

3 of 9years with a major outage

22 hrslongest major outage

Jun, Julhardest months

June and July made up 54% of this county's outage time. The largest outage on record began Jun 29, 2018, reached 2,467 customers, and left at least 200 customers out for 13.2 hours.

Outage time per resident, rated Illinois counties

MostLeast

Outage impact by year

Customer-hours without power. 1,000 customers out for 2 hours is 2,000 customer-hours.

10K

20K

30K

40K

2015'152016'162017'172018'182019'192020'202021'212022'222023'23

Show yearly numbers

Year	Customer-hours	Reported outages	Major outages
2015	2,651	6	0
2016	10,877	8	1
2017	9,706	11	0
2018	24,835	16	2
2019	13,242	10	0
2020	7,742	8	0
2021	9,216	7	1
2022	3,076	5	0
2023	14,790	12	0

When outages hit

Share of this county's customer-hours by month.

10%

20%

30%

40%

JanJFebFMarMAprAMayMJunJJulJAugASepSOctONovNDecD

Largest outages on record

Start date	Hours	Peak customers	Customer-hours
Jun 29, 2018	13.2	2,467	11,687
Sep 26, 2021	21.8	322	7,004
Jan 25, 2023	7.5	1,265	5,562
Jun 21, 2019	5.2	1,279	4,945
Jun 30, 2018	16.5	393	4,465

Hours measure how long at least 200 customers in the county were out. Most customers get power back sooner.

Size your backup battery

Start with what you would keep running. Wattages are typical averages, so check your own appliances.

Phones, Wi-Fi, lights, about 60 WRefrigerator, about 60 WChest freezer, about 40 WGas furnace fan, about 160 W

Hours to cover: 24

1,700 Whof battery capacity, allowing for about 15% conversion loss

If anyone relies on medical equipment, plan that with their provider. Run portable fuel generators outdoors only, at least 20 feet from doors, windows and vents. See the outage checklist.

Look up another county

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How to read this

A major outage lasted at least 8 hours and reached customers equal to at least 1% of county residents.
Records cover outages of at least 200 customers in a county. They do not show what happened on your street.
Utilities that do not report can make a county look better than it is. Data ends in 2023. Read the full method.