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Water Treatment Companies in Longmont, CO

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5.0(29 Verified Ratings)

Westminster, CO·

Compass Plumbing

General Service Plumbing, Water Filtration, Hydro Heat/Boiler , and 2 more

"The day before Thanksgiving the kitchen faucet hose and garbage disposal broke. We turned off the water and wondered how we would have a holiday. HomeAdvisor provided the names of screened plumbers with fantastic reviews. We chose Jay and are glad we did. Within minutes of posting Jay called. We sent pix of the problem and he provided an estimate. Jay is very knowledgeable, friendly, professional and got the work done quickly. Excellent customer service. He did not rack up fees, as some are said to do. We have other plumbing projects to complete and will call Jay."

Cee H. in November 2024

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4.2(155 Verified Ratings)

Hudson, OH·

Leaf Home Water Solutions

Water Treatment and Purification, Consultation and On-Site Water Test, White Glove Installation

"They came out right away and gave me an estimate and they were able to install my water softener within the week."

25BC0603CA10B4CAED820D7BBC767B798D3538F9B8A7F77ADA6C8CDBD5C06A61 8. in July 2025

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4.9(88 Verified Ratings)

Windsor, CO·

American Plumbing & Sewer LLC

Plumbing

"American Plumbing & Sewer replaced an old, damaged main sewer line at my townhome. The foreman Alan B. was great to work with and communicated with me promptly, and in detail, which I really appreciated. Also was impressed with my conversations with the owner and front office person. I felt like I was dealing with real honest people that can be trusted with what I needed. The repair was completed and I'm very satisfied with the results so far. I would hire this company again for future plumbing work."

Gordon L. in August 2024

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5.0(49 Verified Ratings)

American Plumbing & Sewer LLC

Water Softeners, faucets/fixtures, Tankless , and 2 more

Gordon L. in August 2024

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5.0(2 Verified Ratings)

Frederick, CO·

Mountain Range Plumbing LLC

Residential Plumbing

"Mike did a great job at a reasonable price without much advance notice. I would hire him again without reservation!"

Phil B. in June 2023

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4.7(2711 Verified Ratings)

Denver, CO·

Rooter Guy, LLC

Faucets, Fixtures and Pipes - Repair or Replace, Drain Clog or Blockage, Sump Pump - Repair or Replace , and 2 more

"They got here quickly when I needed an emergency repair."

Wayne G. in November 2020

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4.6(55 Verified Ratings)

Denver, CO·

Benjamin Franklin Plumbing - Denver

Tankless Water Heater Installation, Discounts for Seniors & Military, No overtime rates, ever! , and 2 more

"Great job; very professional; very thorough. I do have to say it was much more than I expected to pay, but I know anything plumbing is expensive now and since I am unable to do this myself any longer, I had to go this path."

Judith H. in November 2018

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Longmont Water Treatment Companies are rated 4.3 out of 5 based on 3097 reviews of 3097 pros.

The HomeAdvisor Community Rating is an overall rating based on verified reviews and feedback from our community of homeowners that have been connected with service professionals. See individual business pages for full, detailed reviews.

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HomeAdvisor uses an extensive screening process to screen businesses and business owners/principals. We perform this screening when a business applies to join our network and, if the business is accepted, whenever concerns are brought to our attention. If you have concerns that a pro in our network doesn't meet these standards, please contact us to investigate. We're committed to maintaining a network of trusted home service businesses, and those who don't meet our criteria will be rejected or promptly removed from our network.

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We use a third-party vendor to conduct a criminal records search in the county in which the business owner or principal works. Our third-party vendor uses a national criminal database ("NCD") to screen service professionals. Business owners or principals with felony arrests that carry a pending decision or who are convicted of felonies in the past 7 years ago will not be admitted to the network. Businesses or owners convicted misdemeanors or felonies, or who have dismissed charges or arrests on their records involving rape/incest, sex offenses, or lewd and lascivious behavior at any point in time will not be admitted to our network.

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Water Treatment Companies in Longmont, CO

Find local pros

How It Works

Service Pros

Compass Plumbing

Leaf Home Water Solutions

American Plumbing & Sewer LLC

American Plumbing & Sewer LLC

Mountain Range Plumbing LLC

Rooter Guy, LLC

Benjamin Franklin Plumbing - Denver

Top Water Treatment System Projects

HomeAdvisor Community Rating

Other Top Projects in Your Area

Other Cities in Colorado

Find Water Treatment System Pros in Longmont, CO

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