Is the power out in 20899?

Live answer for ZIP 20899 (Gaithersburg 100% of the ZIP; Montgomery County), from Potomac Edison, updated every 10 minutes.

Right now in 20899

We don't have ZIP-level data for 20899.

Outage map

Outage locations not published
ZIP 20899Montgomery CountyPotomac Edison publishes totals only, not outage locations.
iSome utilities publish only how many customers are out, not where. Their outages are in the counts but can't be drawn on the map.

Outage history in Montgomery County, which includes 20899

2014–2025 record

Montgomery County averaged 7.7 significant outages a year in 2023–2025, fewer than most Maryland counties.

In the 12 months to December 2025, there were 11. Half were over within 1.5 hours; the longest lasted 16 hours, starting June 19, 2025.

The largest on record began November 27, 2022, with 120,582 customers out at once.

Outages are most common in July.

7.7significant outages a year (2023–2025)
iAt least 1% of the area's customers, and at least 100, without power at the same time. Outages less than 6 hours apart count as one.
1.5 hourstypical (median) length
iHalf of significant outages here ended sooner than this, and half lasted longer.
2.7 dayslongest on record (March 2018)
120,582most customers out at once
Largest events (start)Peak outLasted
iHow long this area stayed at or above the significant-outage line, not how long any one home was without power.
Customer-hours
iCustomers out multiplied by hours out, added up over the event. 1,000 customers out for 3 hours is 3,000 customer-hours.
November 27, 2022120,5826.5 hours534,399
March 2, 2018108,6772.7 days1,894,331
July 29, 202355,9991.5 days574,961
October 8, 202142,08030 minutes13,867
June 27, 202337,87415 minutes9,469

Recorded outages from EAGLE-I, Oak Ridge National Laboratory (CC BY 4.0).

iFrom EAGLE-I, Oak Ridge National Laboratory's record of utility outage data every 15 minutes since 2014 (CC BY 4.0). It covered about 9 in 10 U.S. customers.

If your power is out

Report it to your utility

Food safety

  • 0–4 hKeep the fridge closed. It keeps food cold for about 4 hours.
  • 4 h+Throw out meat, dairy and leftovers that have been above 40°F for more than 2 hours.
  • 24 hA half-full freezer holds about 24 hours if kept closed.
  • 48 hA full freezer holds about 48 hours.

Generators, heat and cold

  • Run generators outside only, at least 20 feet from windows and doors. Never in a garage.
  • Use a battery-powered carbon monoxide alarm.
  • Never heat your home with a gas stove or oven.

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