Find trusted water treatment & filtration professionals serving Illinois. All contractors are independently researched and certified.
Only companies with a Certified Best Pick® badge meet our strict satisfaction & licensing requirements and are eligible for the Best Pick Guarantee.
Only companies with a Certified Best Pick® badge meet our strict satisfaction & licensing requirements and are eligible for the Best Pick Guarantee.
"Leaf Home Water Solutions empowers homeowners to take control of their drinking water quality and safety with over 250 customizable solutions. Bringing our Leaf Home excellence, we start with a free water test to learn your needs and budget. Our trusted experts design custom solutions for your home."
Real homeowners looking for water treatment & filtration in your area
"We need I believe 9 windows (all) replaced in our 3 bedroom home. We would like an estimate for the project."
"We are clearing out my mom and stepdad’s townhome. We have a lot of construction debris from dismantling a train layout..."
"Our dryer does not seem to be working very well. It days warm but takes forever to dry clothes now."
"Roof replacement including decking, attic insulation, soffit, fascia, gutters."
"Garage door spring replacement. Normal 2 car garage door. Please provide estimate."
"Installation of new metal fence and gate"
"A few issues: * Chamberlain opener reverses when in the last 4-6 inches of closing; will eventually close * one rolle..."
"boxelders seen inside house. Last fall many were outside on the siding"
"Bedroom window replacement"
"Replace or possibly repair privacy fence, 2 sides, L shape and gate. Already has metal posts anchored in cement. Woo..."
Every Best Pick company in Illinois is independently researched and certified annually. We analyze thousands of customer reviews, verify licensing and insurance, and confirm each company meets our strict qualification standards.
We conduct extensive satisfaction surveys and analyze thousands of customer experiences annually.
Verified by
Independent Research
Companies earn Best Pick certification through performance alone. Only businesses with 80%+ recommendation rates qualify.
Best Pick status isn't permanent. Every certified company must re-qualify annually.
Licensed
Insured
Verified
We stand behind our certified companies with a financial guarantee up to $2,500.
Protected
Financial guarantee included
Only water treatment & filtration companies that meet our strict standards earn Best Pick status.
Water Treatment & Filtration companies must maintain a 4.0+ rating and an 80% recommendation rate.
Current state contractor license verification and general liability insurance for water treatment & filtration work
Minimum 1 year in business with established local presence
Maintain active business registration and in good standing with the state
Consistent water treatment & filtration service quality across all projects
Must re-qualify every year through new research
Common questions about Certified Best Pick® water treatment & filtration companies in Illinois
Best Pick Certified Water Treatment and Filtration companies in Chicago, IL have earned their status through independent consumer research—not paid placement. To qualify, a company must meet strict standards:
Certification is re-verified annually, ensuring continued performance.
No. Water Treatment and Filtration companies cannot buy Best Pick Certification, improved ratings, or better placement. Our research team independently evaluates companies based on customer satisfaction, licensing, insurance, and business stability—before any business relationship exists.
Companies that earn certification pay a participation fee after qualifying, which covers the cost of ongoing research and publication. This fee has no influence on whether a company qualifies or how they appear in our directory.
The Best Pick Guarantee provides financial protection—up to $2,500 in labor costs—if a Certified Best Pick Water Treatment and Filtration company fails to deliver on their commitments.
To be eligible:
This guarantee applies only to Certified Best Pick companies, not Standard Pros. Full terms are available on our guarantee page.
