Eversource outage map
Eversource (Connecticut, Massachusetts and New Hampshire) serves about 3.4 million customers in Connecticut, New Hampshire, Massachusetts. Its official outage map is the quickest way to see whether an outage is already known where you are.
Open the Eversource outage mapOfficial Eversource link, checked by hand. PreparedStates isn't affiliated with Eversource.
Check your ZIP code
See which utility serves you, open its outage map, and check the weather alerts there right now.
Utility by ZIP: NREL/OpenEI (2024), from EIA data, CC BY 4.0; county utilities: EIA Form 861 service territories. A ZIP's utilities are the likely ones, not a guarantee.
How often Eversource customers lose power
In 2025, the average Eversource customer was without power for about 2.7 hours in total, 1.3 hours of it outside major events such as big storms, by the reliability figures it reports to the US Energy Information Administration. The US average was 4.4 hours. How every state compares →
Where Eversource serves
| State | Company | Share of customers | Map |
|---|---|---|---|
| Connecticut | Eversource | 76% | Map → |
| New Hampshire | Eversource | 72% | Map → |
| Massachusetts | Eversource | 47% | Map → |
Share of each state's electricity customers, EIA Form 861 (2024 data). Tap a state for its other utilities, weather alerts and hazards.
What to do in a power outage
- Before: list what needs electricity, keep a flashlight for every person, and ask your provider for a plan for powered medical devices and cold medicines.
- During: keep the fridge and freezer closed, unplug appliances, and use flashlights instead of candles.
- Use generators, camp stoves and grills only outdoors, at least 20 feet from windows. Keep generators that far from doors and vents too.
- After: throw out fridge perishables after 4 hours without power or a cold source, and check refrigerated medicines.
The full power outage checklist, sourced to Ready.gov and the CDC.
Backup power for the next one
- Portable power stations compared: silent, safe indoors, for the fridge, Wi-Fi, lights and a CPAP.
- What will it run? Runtimes for every power station and generator we compare.
- What size generator do you need? The wattage calculator.
- Power failure lights that switch on by themselves when the power goes out.
Questions
How do I check for a Eversource power outage?
Use Eversource's official outage map, linked at the top of this page, or type your ZIP code into the check on this page to find your utility's map and the weather alerts where you are.
How long do Eversource customers go without power?
In 2025, the average Eversource customer was without power for about 2.7 hours in total, 1.3 hours of it outside major events such as big storms, by the reliability figures it reports to the US Energy Information Administration. Any single outage can be shorter or longer.
What should I do when the power goes out?
During: keep the fridge and freezer closed, unplug appliances, and use flashlights instead of candles. Use generators, camp stoves and grills only outdoors, at least 20 feet from windows. Keep generators that far from doors and vents too.