Power Out Map
– 0% of Delta out 0 customers out in Colorado

Power outage history

Delta County Colorado

3.4hours

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

17th most of 39 in Colorado 49% below the national median

Worst outage on record Apr 27, 2023 44% of customers out · 90% back in 2.8 hours
Hours without power, average customer per year 3.4h / yr State average 3.0 h · national median 6.6 h
Major outages a year 2.4 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 2.2days Nov 9, 2022, over 1% of customers out
Outage hours on storm days 42% Share falling on days with a NOAA storm report here
Worst year 2023 6.5 hours without power, average customer
Electricity customers 11,874 ORNL customer model · 7 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 Delta'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

2023 was the worst well-recorded year, at 6.5 hours for the average customer. Hatched years have a thin record and are left out of the averages.

Delta, hours without power per customer

DeltaUS median countyColorado average
0 2 4 6 8 0.2 ’19 2.9 ’20 2.1 ’21 4.5 ’22 6.5 ’23 4.4 ’24 2.9 ’25 US 6.6 CO 3.0

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
Apr 27, 2023 No storm report 5,283 44% 4.2 h 2.8 h 17k
Nov 9, 2022 Winter storm 569 5% 2.2 d – 13k
Apr 22, 2022 Windstorm 4,408 37% 5.0 h 3.5 h 11k
Sep 29, 2021 No storm report 3,840 32% 2.8 h 2.5 h 9.9k
May 14, 2023 No storm report 3,083 26% 2.8 h 1.5 h 8.5k
Mar 2, 2024 Winter storm 1,043 9% 9.8 h 3.5 h 7.0k
Sep 6, 2024 No storm report 5,449 46% 1.5 h 1.0 h 5.8k
May 22, 2021 No storm report 3,470 29% 2.8 h 2.5 h 5.6k
Jun 6, 2020 Wildfire 1,169 10% 25 h 5.2 h 5.3k
Oct 29, 2024 Winter storm 275 2% 20 h – 5.2k
Jul 14, 2020 No storm report 2,284 19% 2.2 h 2.2 h 5.1k
Jun 13, 2024 No storm report 2,125 18% 2.2 h 2.2 h 4.8k

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 +2h 90% by +4h

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 Delta from twelve hours before it began to its peak. Matching shows coincidence, not proof of cause.

  • No storm on record 58%
  • Winter storm 22%
  • Wildfire 12%
  • Windstorm 6.0%
  • Flooding 1.2%

Who keeps the lights on

Utilities serving Delta

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

Utility Type Outage min / yr Excl. major storms Outages / yr Residential ¢/kWh Customers
Public Service Co of Colorado Investor Owned 360 149 1.58 15.9 1.4M
Delta Montrose Electric Assn Cooperative 116 116 0.96 14.9 33k
City of Delta CO – – – – 21k
Grand Valley Power Cooperative 116 116 – 16.2 18k
WAPA-- Western Area Power Administration Federal – – – – –

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 Colorado

Where it is darkest

Hours / yr64+

All Colorado 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 11,874 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 →