Boulder County, Colorado Power Outages, 2015 to 2023

Boulder County, Colorado had 19 major outages from 2015 to 2023

Lower outage time among US counties

Residents here averaged 0.36 times the US outage time per person and 1.08 times the Colorado rate. It ranks 20 of 44 in the state, where 1 has the most. Data confidence: High, with 9 years of records.

2.1major outages per year

7 of 9years with a major outage

72 hrslongest major outage

Mar, Dechardest months

March and December made up 29% of this county's outage time. The largest outage on record began Mar 23, 2016, reached 41,639 customers, and left at least 200 customers out for 43.0 hours.

Outage time per resident, rated Colorado counties

MostLeast

Outage impact by year

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

200K

400K

600K

800K

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

Show yearly numbers

Year	Customer-hours	Reported outages	Major outages
2015	123,798	79	0
2016	376,509	67	2
2017	263,094	68	5
2018	202,168	95	2
2019	300,680	103	1
2020	336,938	164	3
2021	389,456	120	3
2022	478,861	93	3
2023	145,372	141	0

When outages hit

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

10%

15%

20%

JanJFebFMarMAprAMayMJunJJulJAugASepSOctONovNDecD

Largest outages on record

Start date	Hours	Peak customers	Customer-hours
Mar 23, 2016	43.0	41,639	277,207
Jan 1, 2022	72.5	30,294	267,254
Dec 30, 2021	8.8	29,693	131,228
Dec 15, 2021	35.5	11,600	120,997
Sep 8, 2020	32.2	16,554	82,419

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.

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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.