Capital Well is proud to announce it is now offering full service irrigation services across all of New Hampshire.
Click here to book your winterization appointment or to learn more about our full suite of irrigation services!

Where water
meets innovation.

Since 1986, Capital Well has been providing water well treatment & maintenance to homes & businesses across New Hampshire.
NO H2O or Water 911 Emergency?
On-Call Service 7 days a week: 800.924.1192
Well & Pump Services
Filtration & Treatment
Water Testing

As the leading provider of water well treatment and maintenance in New Hampshire, we are excited to introduce our latest offering - state-of-the-art Irrigation Services. View our services and book an appointment with us today!

Person filling up water bottle

Take the First Step Towards Clean Water - And Do It For Free! 

Don’t compromise when it comes to your health and safety. Contact us today to learn more about our PFAS water testing and filtration solutions. Protect your loved ones and gain peace of mind knowing your water is clean and healthy for everyone to consume.

Let’s help you get to the right place

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I need to…

Our staff is on call 24/7. Call us at 800.924.1192 for immediate service. Or, contact us via our emergency form.

Call us at 800.924.1192, email us at or fill out our request service form.

You can contact us through our request a quote form. Or give us a call at 800.924.1192—we’re open 24/7.

You can make a payment over the phone at 800.924.1192, or using our make a payment form.

Latest News

Private Well Class for New Hampshire Homeowners

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Customer Resources

From buying or building your new home to updating an existing home or business, Capital Well can service all your water needs. Click below to learn more about the service that is right for you.

Is your drinking water clean?

Drinking water with high levels of arsenic, chlorine or radon is potentially harmful to your health. Contact us to schedule a water test or consult and make sure your drinking water is safe.


Bladder Cancer

NH has 37% higher bladder cancer rate compared to the national average, according to the CDC due to arsenic levels in private water wells. In New Hampshire, NHDES has established a state arsenic MCL of 5.0 ppb, half the EPA RCL of 10ppb.


Cancer Risk

Cancer risk among people drinking chlorinated water is 93% higher compared to those whose water does not contain chlorine, per the USCEQ.


Private Wells

40% of all private wells in NH that exceed the recommended radon levels, per the NH DES.

Let us help you to get the best quality water in your home while making sure NH kids have food security when returning to school this year. To support Drinking Water Awareness Month, Capital Well will donate 10% off all water treatment to the Backpack Program through September!

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