Get a no-cost Home Energy Assessment

As we head into cooler months, and with energy costs rising, now is a great time to check your home’s energy efficiency. The assessment is free, and you may be eligible for incentives through Mass Save®.

A friendly reminder about the prompt-payment discount

We continue to receive questions from customers who expected to receive the monthly prompt-payment discount. We hope the following information helps clarify how the discount works.

Please update your contact information today!

Did you get a postcard from us? Update your contact info here.

Electrify Merrimac 2026

Vote for your favorite project ideas today!

Merrimac Light vs National Grid

We’re dedicated to informing our customers of the benefits of public power versus investor-owned utilities like National Grid, and one of the major benefits is the difference in cost.

Rate Comparisons

See how our rates compare to other towns and private companies.

Free LED Light Bulbs!

We understand that our customers want to save as much energy as possible to reduce their monthly electric bill. To assist in that effort, MMLD will be handing out free LED light bulbs!

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MMLD Awarded the 2026 Gold-level Public Power Customer Satisfaction Award

The American Public Power Association has awarded Merrimac Light the 2026 Gold-level Public Power Customer Satisfaction Award! We want to thank everyone who took the time to complete the customer satisfaction survey. We have the best customers, and it's our pleasure...

Massachusetts apprentices train for demanding, essential careers

As artificial intelligence reshapes workplaces, two demanding Massachusetts trades still rely on human judgment, technical skill, and physical endurance.

Watts New: September Issue

Our very first edition of Watts New! This issue contains billing system changes, resources, safety information, team spotlight, rate comparison and a list of upcoming events!

USPS Postal Charge Notice

Beginning January 1, 2027, Merrimac Municipal Light Department will begin charging customers the current U.S. Postal Service mailing rate (currently $0.78) for each mailed paper electric bill. Customers who prefer not to pay this mailing charge are encouraged to...

Thank You, Norman DeNault

On May 8th, we gathered at the Merrimac Light garage for a cookout to celebrate Norman DeNault's retirement from the Board of Light Commssioners. We extend our sincere gratitude to Norm for his dedication and commitment to the town of Merrimac for over 29 years as...

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The weather is looking promising ☀️this Friday, October 2 for MMLD’s 2nd annual Movie 🎬 Night at the Donaghue School Field at 7pm. Movie start time will be 7:30ish. Bring a chair and a blanket. We will supply the 🍿🧃🥤Get ready for Star Wars: the Mandalorian and Grogu! Keep an eye on our page for updates. ...

It’s been a day! Thank you to Merrimac Police Department, Merrimac Fire and Merrimac Highway. Here are some pictures from East Main and West Shore Road. ...

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1:30p - just got word that the majority of those that lost power now have power! Hang in there, those that don’t have power yet, we’re still working on it! ...

1:30p - just got wor

** Update 1:30 pm - Road is open - power is restored.

West Shore Road is closed while the Merrimac Light Department clears a tree and repairs the wires. Power will be restored as soon as possible
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9:34 am - Unfortunately we need to shut off power to the East side of town to deal with the massive tree that is leaning on the power lines on East Main Street. We will restore power ASAP. North Shore Community, Bear Hill Road and the streets around that area will be out for a little bit. We apologize for any inconvenience. ...

That’s a big one! Our linemen are working diligently to restore power. We apologize for the outage. We hope to have power restored ASAP. ...

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We regret for inform you that Movie Night at the Donaghue School Field which was scheduled for tomorrow, 9/25 has been postponed due to the impending weather. We hope that Mother Nature will work with us and allow us to host movie night on Friday, 10/2 instead. We will keep an eye on the weather and give updates next week. In the meantime, enjoy your weekend and stay safe! ...

We regret for inform

MMLD is back in the plains area of Merrimac doing our GIS mapping work. We are wearing brightly colored safety vests and will be taking inventory of poles and meters. ...

Merrimac Light will be in the Church/Mechanic/Liberty Street area continuing our GIS mapping project. We are wearing safety vests and will be taking pictures of meters and poles.
Q: Why?
A: This will provide MMLD with an accurate, up to date map of our system. This helps us locate equipment more quickly, plan maintenance, and upgrades, respond to outages, and improve the reliability and safety of the electric system. The mapping is part of our normal utility operations and is intended to help us better manage and maintain the system- not to change anything about your electric service.
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