#1
H2O Care, Inc
“The H2O Care technician David was knowledgeable and professional in answering questions I had about our system. The company is reliable and very good at communications and customer service.” — Google review
Best Water Purification Services in Watertown, MA
The 8 best-rated water purification services in Watertown, MA average 4.8★ on Google across 1,351 reviews. H2O Care, Inc has the top rating (5.0★), and Premier Water Systems, Inc has the most reviews (657). Updated October 25, 2026.
8 companies that meet our bar: rated 4.5★ or higher on Google, with a meaningful review history (1,351 reviews combined) and currently operating. Request a call back and the company will phone you directly.
#2
Aquatek Filtration & Pump Service Inc.
“The service I was provided was exceptional! I had no water at my house so I called these guys. Within a half hour, Curtis showed up. Curtis IS awesome!! He diagnosed the problem promptly and determined that my well…” — Google review
#3
Premier Water Systems, Inc
“I had to review my service call from Premier water. My technician John was outstanding with the way he serviced my water issue. He was one in a million guys that come to your home for a service call. He tested…” — Google review
#4
Pro Comfort Control Water Filtration & Water Heaters
“Pro Comfort was a pleasure to work with from start to finish. They installed a new heating/cooling system and although they charged a little more than other companies I got quotes from, it was absolutely worth it.…” — Google review
#5
Colton Water Removal & Cleanup
“Arrived very quickly and did a thorough inspection of the mold. The service was excellent, with clear communication and no pressure. Give us honest and unbiased recommendations. Great experience!” — Google review
#6
Barclay Water Management, Inc.
“Mike Vazquez, Awesome guy, really enjoy his visits, very attentive to the clients needs. He has a great personality and is extremely personable. Great front man for Barclay, he represents very well. Glad to have had…” — Google review
#7
Deer Island Wastewater Treatment Plant
“it's always 98.6 degrees for some reason down here. they have the best lemonade and chocolate bars. these people are professionals who never let a floater get away from them.” — Google review
#8
Plumbers Supply Co.
“Amazing staff and customer service. I went today to get a couple of stuff! Not only were they quick to understand what I needed but they went beyond and spent some time in finding a rare gaskit.” — Google review
How we pick water purification services in Watertown
We scan Google Maps for water purification service listings in and around Watertown, keep only open businesses whose main category matches the service, and require a Google rating of at least 4.5 from at least 20 reviews. Companies are ordered by a confidence-weighted score that balances rating and review volume. We do not accept payment for placement.
Frequently asked questions
Who is the highest-rated water purification service in Watertown?
H2O Care, Inc has the highest Google rating on our Watertown list: 5.0 out of 5 from 318 reviews (as of October 25, 2026).
Which water purification service in Watertown has the most reviews?
Premier Water Systems, Inc has the most Google reviews among the companies listed here: 657, with a 4.9★ average.
How are these water purification services chosen?
Only open Watertown-area businesses whose Google category matches the service, rated at least 4.5★ from at least 20 Google reviews. They are ordered by a confidence-weighted score of rating and review volume. Placement is never paid.