The 7 best-rated water treatment services in Cary, IL average 4.8★ on Google across 2,062 reviews. Suburban Water Conditioners has the top rating (5.0★), and Roto-Rooter Plumbing & Water Cleanup has the most reviews (1,251). Updated October 26, 2026.
7 companies that meet our bar: rated 4.5★ or higher on Google, with a meaningful review history (2,062 reviews combined) and currently operating. Request a call back and the company will phone you directly.
“I recently had a sewer back up and it turned into extensive sewer issues needing to be repaired. Although this was unexpected and costly, the crew sent out to do the repairs was professional and trustworthy. They…” — Google review
“Who knew that ServiceMaster does carpet cleaning? They do! They did a great job on my carpets, rugs, and cleaning the grout on my kitchen floor. Dan was responsive, friendly, professional, and honest with his…” — Google review
“I highly recommend! The staff here are wonderful and our system has made the water so much better for everything from drinking, to washing clothes. Our cats also like it much better.” — Google review
“Paul and Josh were very professional and did a great job. We will continue to use their services and will highly recommend their services to others. Thank you and God bless!” — Google review
“Have been working with their systems for over 8 years install / service. Great guys to work with, systems are ready in time, easy to maintain, big variety of tanks / resin to build the right system for the customers…” — Google review
“I have been using Garrelt's water treatment for quite some time now they are always prompt and helpful with my water softening in Iron removing system could not ask for a better company to deal with” — Google review
“Darren was great. He was professional punctual and very knowledgeable. Before he started the installation he gave me a breakdown of what's going to happen so no surprises. After he showed me everything in the…” — Google review
We scan Google Maps for water treatment service listings in and around Cary, 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.
Suburban Water Conditioners has the highest Google rating on our Cary list: 5.0 out of 5 from 22 reviews (as of October 26, 2026).
Roto-Rooter Plumbing & Water Cleanup has the most Google reviews among the companies listed here: 1,251, with a 4.9★ average.
Only open Cary-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.