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Top-Rated Water treatment pros in San Marcos - Updated Nov 2026

Avatar for The Water Doctor
The Water Doctor
4.9(
211
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or Service

Serving San Marcos, TX and surrounding areas

Approved

Super Service Award Winner

In business since 2005

Emergency services offered

Warranties offered

"Just had my system installed today and cannot be any happier. I found The Water Doctor here on Angi's list and I am glad I did. I just bought my first house and have lived in San Antonio my whole life so I know hard the water can get. First, Patricia came over to test the water and gave me information regarding water treatment that no other salesperson seems to have the same knowledge of. She went over every system tier, any questions I had, and the ways to pay and discounts. They are straight forward and honest which is how I like to conduct business. Install was scheduled within a couple of days of the paperwork. Hugo and his team was so professional and showed me the ins and outs of the water system. With the tier we got, we get a supply of natural soaps which we are big on so ask about that! I highly recommend the Water Doctor if you need any water softner needs!"
Dual tank
Installation
Installation
Installation
Installation

+3

Response time1 day
Response rate85%
14 neighbors recently requested a quote
Avatar for Leaf Home Water Solutions
Leaf Home Water Solutions
4.2(
202
)
Water Treatment & Purification System - Install or Replace

Serving San Marcos, TX and surrounding areas

Approved (Corporate)

In business since 2020

Free estimates

Warranties offered

"The technician came on time and, although it took him longer than expected to install the system, he installed it and demonstrated the system for me. The next day, I noticed there was still water on the concrete close to the system but, I figured it was residual water. Apparently the system was leaking. Two days after install I contacted Leaf and advised them that the system was leaking. Early, the next business day, they arrived and repaired the leak and made sure I was happy. My system seems to be working well and I am satisfied."
Leaf Home Water Solutions
Leaf Home Water Solutions
Will filtered water help me save money?
What does filtered water taste like?
How do I know what contaminants are in my water?

+44

141 neighbors recently requested a quote
Recommended by71%of homeowners
Avatar for Garrett's Plumbing
Garrett's Plumbing
5.0(
33
)
Water Treatment & Purification System - Install or Replace

Serving San Marcos, TX and surrounding areas

Approved

In business since 2015

Free estimates

Warranties offered

Garrett’s Plumbing brings 27 years of hands-on plumbing experience rooted in four generations of trade professionals. We understand the value of integrity, quality, and doing the job right the first time. Whether you’re upgrading your home’s plumbing systems or dealing with unexpected emergencies, we offer modern solutions with old-school reliability.

6 neighbors recently requested a quote
Abundant Plumbing
5.0(
5
)
Water Treatment & Purification System - Repair or Service

Serving San Marcos, TX and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

Abundant Plumbing is a locally owned plumbing company proudly serving homeowners across Austin and nearby communities. Our team is built on generations of plumbing knowledge and a strong connection to the neighborhoods we work in every day. Founded by Alec & Vanessa Barrera, a fourth-generation plumber, the company continues a family tradition of skilled workmanship and honest service that has been passed down through decades of hands-on experience. \n \nAlec brings more than twenty years of field experience to every project and leads the company with a clear purpose. His goal is simple. Provide dependable plumbing solutions while treating every home with the respect it deserves. With a Responsible Master Plumber license and OSHA certification, our work reflects both professional training and real world knowledge gained through years of serving customers.

9 neighbors recently requested a quote
Avatar for Prostar Water, Inc.
Prostar Water, Inc.
4.6(
42
)
Water Treatment & Purification System - Install or Replace

Serving San Marcos, TX and surrounding areas

In business since 1991

Free estimates

Warranties offered

"Customer Service Sales Agent Justine was laid back and very knowledgeable. She was not pushy and follow up periodically to see if we were still in the market for a water softener system. We like the warranty, system and her. The 2 plumbers that came to install were quick, efficient and had very neat installation."
Response time1 day
Recommended by83%of homeowners
Avatar for Basin Water Solutions
Basin Water Solutions
4.8(
245
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or Service

Serving San Marcos, TX and surrounding areas

In business since 1996

Free estimates

Emergency services offered

"The work is professionally done and explained very well. My wife and I are happy with the installation of the RO system and water softener. I would recommend Basin Water Solutions to anyone for those services. Job Well Done!"
Commercial RO System
Water Softener Install
Commercial RO Install
Commercial RO Install
Softener Install

+19

Response time6 hrs
Response rate92%
Recommended by97%of homeowners
Avatar for Prostar Water Inc
Prostar Water Inc
4.8(
262
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or Service

Serving San Marcos, TX and surrounding areas

In business since 1996

Free estimates

Credit card accepted

"We have a water system on our place for cleaning and treating our water since we have wells. We have a water clarification system which we bought from them and they come out every year and do maintenance on it. It is more than just a softener, it's a clarification system as well, it crops out solids and everything. They've got a service tech that's really knowledgeable and knows his business. Their maintenance costs and service calls are not inexpensive but they are no different from anybody else. When they came to install the new part, it took about 20 or 30 minutes."
Recommended by97%of homeowners
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