Alliance Water Treatment Co.

4.61 |56 Verified Ratings
Write a Review

Alliance Water Treatment Co.

4.61 | 56 Verified Ratings
Write a Review


PO Box 3036
Stamford, CT 06902
Your use of our services is governed by our Terms & Conditions

Alliance Water Treatment Co.

Home of affordable systems, outstanding service, and great customer satisfaction.

Water Treatment, Radon, Waterproofing, 30+ years. Serving residential and commercial customers in the Connecticut, New York, and New Jersey. Our customer's referrals are our main source of business. - since 1984.


Learn how HomeAdvisor screens and approves their pros.

Service Area

  • Stamford
  • Yonkers
  • Norwalk
  • White Plains
  • Danbury
  • Mount Vernon
  • New Rochelle
  • Westport
  • Greenwich
  • Fairfield
  • Croton on Hudson
  • Ridgefield
  • Scarsdale
  • Old Greenwich
  • Wilton
  • Redding
  • Irvington
  • Brookfield
  • Larchmont
  • Purchase
  • West Harrison
  • Mount Kisco
  • Crompond
  • Millwood
  • Yorktown Heights
  • Southport
  • Harrison
  • Hawthorne
  • Pleasantville
  • Pelham
  • Katonah
  • Bedford
  • Newtown
  • Georgetown
  • Elmsford
  • North Salem
  • Rye
  • New Canaan
  • Valhalla
  • Cortlandt Manor
  • Thornwood
  • Easton
  • South Salem
  • Tuckahoe
  • Goldens Bridge
  • Trumbull
  • Briarcliff Manor
  • Somers
  • New Fairfield
  • Weston
  • Bedford Hills
  • Port Chester
  • Ardsley
  • Riverside
  • Pound Ridge
  • Redding Center
  • Hartsdale
  • Redding Ridge
  • Tarrytown
  • Greens Farms
  • Mamaroneck
  • Jefferson Valley
  • Bronxville
  • Ardsley on Hudson
  • Hastings on Hudson
  • Darien
  • Mohegan Lake
  • Peekskill
  • Cos Cob
  • Armonk
  • Dobbs Ferry
  • Ossining
  • Chappaqua
  • See All >

Services Offered

  • Waterproofing Foundation or Basement
Mold & Asbestos Services
  • Radon Gas Mitigation

Areas of Expertise

  • Radon Testing and Mitigation
  • Water Treatment Equipment Sales and Service
  • Water Testing
  • Basement Waterproofing

Product Brands Used

  • Many national brands including our own

Quick Facts

Business Hours
(Please call to confirm)
  • Warranty Offered
  • Credit Cards Accepted
  • Warranty Description: Varries with each product. We stand behind everything we do.


In Business Since: 1984
Memberships & Affiliations
  • National Radon Saftey Board, Licensed Contractor, Chamber of Commerce since 1984
State Licensing
Trade: Home Improvement
License #: HIC.0600810
Expiration: 11-30-2019
  • Continental's Who's Who of Business Professionals
  • Certified Water Treatment Speicalist
  • Licensed Water Treatment Contractor
  • National Radon Safety Board
  • Rutgers University Continuing Professional Education
HomeAdvisor Screened. View Details

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Business Overview

Community Involvement

Chamber of Commerce since 1984

How We Got Started

I chose to work in this industry because We take great care of our customers and they thank us with their referrals.

We started in this industry in 1984.

We describe our business as Well established


Alliance Water Treatment Co.

My Work
1 Projects
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Ratings & Reviews
Alliance Water Treatment Co.

Real feedback from real homeowners.
Learn more about this pro by reading the ratings and reviews below.
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Showing 1-10 of 56
  Page 1 of 6
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4.0   |  
Review by in Redding, CT
They are quick to respond and reliable.
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5.0   |  
Review by in Chappaqua, NY
Installer was very competent and efficient. Explained the process clearly.
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5.0   |  
Efficient service, prompt response to the estimate request. Installation went smoothly and worked with my schedule.
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4.83   |  
Review by in Westtown, NY
Project: Mitigate Radon Gas
John and his long time assistant came out to my home in Orange County NY and correct;u assessed the radon problem and corrected it with minimal expense. I asked for the best of the best on Service Magic and Alliance has demonstrated that they are! Thanks John!
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4.67   |  
Review by in Norwalk, CT
This company came in and did an excellent job! They were very professinal and reasonably priced. I was very pleased with their work and plan to hire them for another project in the future.
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1.0   |  
Review by in Carmel, NY
A radon remediation system was installed . It did not bring radon level down to a safe level. After additional attempts to bring the radon level down, and lots more money, we still didn't have safe levels. Eventually had another contractor look at the problem. He stated that the exterior pipe was too small and was constricting the air flow. He changed the pipe and we now have a safe radon level. He also stated that the additional attempted fixes were not necessary had the correct pipe been installed in the first place. In addition, the fan is now dieing due to the constriction of air flow. Alliance refuses to take any responsibility.
Response by Alliance Water Treatment Co.: Customer was to call us a year ago to take the final step in completing her system. We never heard from her until a few weeks ago. She said she hired another contractor and if we didn't give her a new fan that she would "ruin our business" by contacting as many agencies and organizations as possible. She also stated that company X had to correct a lot of our work. We told her that if she could name one we would give her a free fan. Again, we never heard from her. Hundreds of happy, five star rating, satisfied customers and one angry person trying to "ruin our business". Do the math.
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5.0   |  
Review by in Redding, CT
The project is currently underway, but thus far very professional. Work has been done on schedule and the quality looks very good.
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5.0   |  
Review by in Yonkers, NY
I'm very happy with what they have done so far. There are still a couple of minor issues that need to be rectified. I did give them a 5 rating assuming that they would come back and rectify the minor problems as soon as possible
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3.0   |  
Review by in Stamford, CT
Very nice people. Water still coming into basement.
Response by Alliance Water Treatment Co.: We don't know who this is. I'm glad they like us. Our waterproofing is guaranteed for life so they should contact us if they have any problems.. I'm guessing it's water from a different source that needs to be addressed.
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5.0   |  
Excellent experience. John is very professional and Julio, who installed my water tank and new water treatment system was a treasure. They took my old equipment away, which was a blessing. I just know that any after care (if necessary) will be attended to promptly.
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Showing 1-10 of 56
  Page 1 of 6

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