Power Out Map
– 0% of Knox out 0 customers out in Maine

Power outage history

Knox County Maine

27hours

without power for the average customer in a typical year, 2018–2025

9th most of 16 in Maine 4.1× the national median

Worst outage on record Oct 30, 2017 95% of customers out · 90% back in 4.8 hours
Hours without power, average customer per year 27h / yr State average 21 h · national median 6.6 h
Major outages a year 11.4 Peaks over 10% of customers or 50,000 customers
Typical time to restore 90% 2hours Median across major outages, from the peak
Longest single outage 6.6days Oct 30, 2017, over 1% of customers out
Outage hours on storm days 67% Share falling on days with a NOAA storm report here
Worst year 2020 2.6 days without power, average customer
Electricity customers 15,343 ORNL customer model · 8 well-covered years

Every day since 2015

Eleven years, one night at a time

Each cell is a day. The brighter it is, the larger the share of Knox's customers who were without power at that day's worst moment.

20152016201720182019202020212022202320242025
0%100% of customers out

Year by year

Hours in the dark, per customer

2020 was the worst well-recorded year, at 2.6 days for the average customer. Hatched years have a thin record and are left out of the averages.

Knox, hours without power per customer

KnoxUS median countyMaine average
0 20 40 60 80 2.6 ’15 9.1 ’16 49 ’17 9.1 ’18 2.3 ’19 61 ’20 8.7 ’21 26 ’22 56 ’23 36 ’24 13 ’25 ME 21 US 6.6

The record

The biggest outages since 2015

Ranked by customer-hours lost: customers out multiplied by how long they stayed out. Times are local.

Began Storm Peak out Share Lasted 90% restored Customer-hours
Oct 30, 2017 Windstorm 14,527 95% 6.6 d 4.8 h 675k
Apr 9, 2020 Winter storm 11,010 72% 5.0 d 2.2 d 497k
Mar 14, 2023 Winter storm 15,343 100% 2.1 d 31 h 290k
Dec 23, 2022 Windstorm 10,269 67% 2.5 d 30 h 283k
Apr 4, 2024 Winter storm 11,265 73% 2.6 d 30 h 265k
Dec 18, 2023 Windstorm 9,040 59% 3.1 d 44 h 225k
Sep 16, 2023 Hurricane Lee 7,640 50% 40 h 30 h 157k
Mar 23, 2024 Winter storm 5,446 36% 44 h 32 h 115k
Sep 30, 2020 No storm report 6,646 43% 35 h 28 h 113k
Dec 5, 2020 No storm report 4,771 31% 2.1 d 23 h 98k
Nov 30, 2020 Windstorm 3,793 25% 43 h 28 h 77k
May 1, 2023 Flooding 7,796 51% 20 h 12 h 55k

After the peak

How fast the lights come back

Each line is one major outage, from its peak. The amber line is the typical path.

0% 25% 50% 75% 100% peak+24h+48h+72h+96h half back by +12h 90% by +30h

When it happens

The outage clock

Customer-hours out by month (rings, January innermost) and local hour, 2018–2025.

00061218 Jan inside

What was happening

Weather behind the outages

Each outage is matched to NOAA storm reports for Knox from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.

  • Winter storm 39%
  • No storm on record 33%
  • Windstorm 19%
  • Tropical storm 5.7%
  • Flooding 3.6%
  • Thunderstorms 0.6%

Who keeps the lights on

Utilities serving Knox

As each utility reports to the Energy Information Administration for its whole Maine territory, not this county alone. Outage minutes include major storm days.

Utility Type Outage min / yr Excl. major storms Outages / yr Residential ¢/kWh Customers
Central Maine Power Co Investor Owned 318 177 2.11 27.4 584k
Fox Islands Electric Coop, Inc ME – – – 30.9 6.9k
Matinicus Plantation Elec Co ME – – – – 212

EIA Form 861, latest year each utility reported. Outage minutes are SAIDI, the yearly minutes the average customer goes without power; outages a year are SAIFI.

Next door

Neighbouring counties

Across Maine

Where it is darkest

Hours / yr64+

All Maine counties →

About these numbers

Notes

Outages come from the EAGLE-I record of utility outage maps collected every 15 minutes by Oak Ridge National Laboratory. Hours without power are customer-hours divided by the county's 15,343 electricity customers. Averages use well-covered years from 2018. Outages shorter than 15 minutes, and utilities that publish no outage map, are not in the record, so these figures understate the total. How every number is made →