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Top-Rated Water treatment pros in Londonderry - Updated Nov 2026

Avatar for Ethical Home Pro LLC
Ethical Home Pro LLC
4.9(
29
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or Service

Serving Londonderry, NH and surrounding areas

Approved

In business since 2016

Free estimates

Credit card accepted

"They were very professional and did a fantastic job. They showed up on time, installed the system in a timely manner, spent extra time unclogging all pipes and faucets from the excess minerals. They arranged for the electrician to add extra plug sockets. They did a great job explaining the system and cleaned up after themselves."
water softener and pressure tank
Water Treatment
Response time12 hrs
Response rate87%
Recommended by100%of homeowners
Avatar for NH Watercare Corp.
NH Watercare Corp.
4.6(
16
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or Service

Serving Londonderry, NH and surrounding areas

Approved

In business since 1980

Free estimates

Emergency services offered

"My well water has a high content of iron and manganese. I lived with it for 23 years because I thought the only solution was a water softener system. I had one in my previous home and didn't like the soapy feeling on the body after a shower. Then somebody advised me that a green sands system would eliminate the minerals without leaving me with that distasteful soapy feeling. The only company in NH that I could find that would provide a green sands system was NH Water Care. I contacted them and got an estimate. I also contacted the 3 references they provided after I requested them. All positive. So I decided to have them install the system. After the installation was completed they took a water sample and had it tested. The result showed that the iron level was now well below the recommended level but even though the manganese had gone down appreciably it was still above the recommended level. I wasn't concerned since manganese, especially at this new level, does not present a health problem. But I still called Matt Griffin, the owner, and asked if anything more could be done. He came out soon after and adjusted the backwash to occur more frequently. One of his people came out a few weeks later to retest the water to see if made any improvement. After the test results indicated that there wasn't any a tech came out and added some more chemicals to the tank. Matt is coming out in a couple of days to test the water to see if the addition of the extra chemicals had the desired result. Bottom line - NH Watercare is a great company and they give great support to their customers. I would highly recommend them to anyone needing a water treatment system."
Municipal filtration
The well from hell
Response time2 days
15 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for N & N Water Solutions
N & N Water Solutions
5.0(
7
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or Service

Serving Londonderry, NH and surrounding areas

Approved

In business since 2022

Free estimates

Credit card accepted

"Everyone I encountered with through NNN water solutions was super helpful and extremely knowledgeable. They were very patient with me as I was very nervous to comit to purchasing but they answered any question or concern I had. Installation was quick the guy was done within a few hrs. I normally don’t bother writing reviews but I’m so excited to have my new water system! I have really bad eczema and since having the new system my skin is so much less irritated. It is amazing the difference clean water will do"
10 neighbors recently requested a quote
Avatar for Sila Heating, Cooling, Plumbing and Electrical
Sila Heating, Cooling, Plumbing and Electrical
4.5(
5,404
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or Service

Serving Londonderry, NH and surrounding areas

Approved

In business since 1989

Free estimates

Emergency services offered

Live Your Most Comfortable Life with a Company You Trust. \nWe offer Same Day Service and Next Day Installation! \n \nSila has been the center of delighting homeowners since 1989, with our team of engineers, certified technicians, and system designers that are proud to deliver the highest level of expertise in the HVAC industry. Whether it?s a repair, replacement, installation, or service, we have an unwavering commitment to keeping you and your family comfortable and safe ? season after season. \nWe guarantee satisfaction and are proud to have earned over 7,000 ?A? ratings on Angie?s List and its prestigious Super Service Award!

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+6

65 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Northeast Water Wells, Inc.
Northeast Water Wells, Inc.
New to Angi
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or Service

Serving Londonderry, NH and surrounding areas

Approved

In business since 1966

Free estimates

Credit card accepted

We are a locally owned and operated company. We value honesty and integrity in all aspects of our business. We offer a variety of home improvement services that are customized to each individual project. We pride ourselves on the quality of our work, as well as our commitment to outstanding results. We look forward to building lasting relationships with our clients and guarantee your satisfaction!

Truck
7 neighbors recently requested a quote
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