Clean, great-tasting water is essential for every home — and choosing the right water treatment company helps ensure your family’s health and comfort. From reducing contaminants to softening hard water, modern filtration systems can make a measurable difference in quality and efficiency.
The best water treatment companies of 2025 combine advanced filtration technology, certified installers, and long-term warranties. Whether you need a whole-home system or a compact under-sink filter, these brands deliver reliable performance backed by years of expertise.
Most homeowners spend $1,000 to $5,000 for professional water treatment system installation, depending on home size, filtration type, and water quality issues.
- Best for Full-Service Installation: Leaf Home Water Solutions
- Best for Whole-Home Softening and Filtration: RainSoft
- Best for National Service and Expertise: Culligan Water
- Best for Eco-Friendly, Salt-Free Systems: SpringWell Water Filtration Systems
Best Companies at a Glance
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- Comprehensive testing and installation
- Certified whole-home systems
- Excellent customer support and warranty
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- Industry-leading warranties
- Professional in-home service
- Certified water treatment specialists
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- Nationwide network and support
- Flexible rental and purchase options
- WQA-certified products
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- DIY and professional options
- Affordable whole-home systems
- Strong performance certifications
Top Water Treatment Companies
Leaf Home Water Solutions
- Average Cost: $2,000 to $5,000
What We Love
Leaf Home Water Solutions offers professionally installed, customized water treatment systems tailored to your home’s needs. Each unit is designed after an in-home water test, ensuring precise treatment for local conditions. The company stands out for its full-service approach, offering filtration, softening, and purification options under one roof.
We rate it 5 stars for quality, customization, and full-service installation.
The company also operates Leaf Home Stair Lifts, LeafFilter, and Leaf Home Bath.
Cost Information
Average costs vary by water quality and home size.
- Whole-Home Filtration: $2,000 to $4,000
- Softener Add-On Systems: $3,000 to $5,000
- Annual Maintenance Packages: $150 to $300
Best Product
The Leaf Signature Whole-Home Filtration System removes chlorine, heavy metals, and sediment for cleaner, healthier water.
RainSoft
- Average Cost: $2,000 to $5,500
What We Love
RainSoft has led the water treatment industry for over 60 years with its premium softeners and filtration systems. Each RainSoft product is manufactured in the U.S. and installed by certified local professionals. Their systems use advanced regeneration technology to reduce water waste and salt consumption.
We rate it 5 stars for premium build quality, system performance, and service reliability.
Cost Information
Most projects fall between $2,000 and $5,500, depending on water hardness and treatment scope.
- Water Softener Systems: $2,000 to $4,000
- Filtration + Softening Combo: $4,000 to $5,500
- Service Plan Add-On: $200 to $350 per year
Best Model
The RainSoft EC5 Water Conditioning System offers app-based monitoring, low-salt regeneration, and exceptional water clarity.
Culligan Water
- Average Cost: $1,500 to $4,500
What We Love
For over 85 years, Culligan Water has been one of the most recognizable names in water treatment. Its network of certified local dealers offers water testing, system installation, and long-term maintenance. Culligan provides both whole-home and drinking water solutions with flexible financing and rental plans.
We rate it 5 stars for reputation, reliability, and customer service.
Cost Information
Costs depend on system type and service plan.
- Water Softeners: $1,500 to $3,500
- Reverse Osmosis Systems: $2,000 to $4,500
- Annual Maintenance Plan: $100 to $250
Best Series
The Culligan Aquasential® Smart HE Series delivers real-time monitoring, salt-saving efficiency, and premium softening performance.
Aquasana
- Average Cost: $1,000 to $3,000
What We Love
Aquasana provides high-performance filtration systems that balance affordability and water purity. The brand’s under-sink and whole-home systems are easy to maintain and independently certified by NSF. Its salt-free conditioners appeal to eco-conscious homeowners.
We rate it 4.5 stars for affordability, efficiency, and ease of installation.
Cost Information
Typical project pricing ranges $1,000 to $3,000.
- Whole-Home Filters: $1,000 to $2,000
- Under-Sink RO Systems: $800 to $1,500
- Filter Replacement Kits: $100 to $250
Best Model
The Rhino® Whole House Filter System removes chlorine and heavy metals while maintaining natural minerals for better taste.
Pentair
- Average Cost: $1,500 to $4,000
What We Love
Pentair is a global leader in water treatment and smart filtration technology. Its systems integrate with home automation platforms, providing insights into water usage and filter performance. Pentair offers both residential and light commercial systems.
We rate it 4.5 stars for innovation, efficiency, and reliability.
Cost Information
Pricing varies by system type and integration.
- Whole-Home Systems: $1,500 to $3,500
- Smart Monitored Filters: $2,500 to $4,000
- Annual Filter Service: $200 to $350
Best Model
The Pentair Home Connected Water Softener provides smart tracking and customizable softening levels via mobile app.
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SpringWell Water Filtration Systems
- Average Cost: $1,500 to $3,500
What We Love
SpringWell Water Filtration Systems focuses on whole-home, salt-free water conditioning and purification. Its systems are ideal for homeowners seeking an eco-friendly solution that reduces scale without adding sodium. SpringWell’s units are made in the USA and come with long warranties and strong customer support.
We rate it 4.5 stars for sustainability, performance, and system innovation.
Cost Information
Pricing varies by system size and water source.
- Whole-Home Filtration Systems: $1,500 to $3,000
- Combo Filter + Softener Units: $2,000 to $3,500
- Filter Replacements: $100 to $250
Best Product
The SpringWell CF1 Whole House Water Filter System provides salt-free, chemical-free filtration with advanced media for chlorine, sediment, and odor reduction.
Hague Quality Water
- Average Cost: $1,800 to $4,500
What We Love
Family-owned for more than 60 years, Hague Quality Water offers customized water treatment solutions throughout the Midwest and East Coast. Its products focus on efficiency and durability, featuring built-in smart controls that track usage and salt levels.
We rate it 4.5 stars for regional service, customization, and reliability.
Cost Information
Pricing varies by water condition and household size.
- Water Softeners: $1,800 to $3,000
- Whole-Home Systems: $3,000 to $4,500
- Service Plans: $200 to $400 per year
Best Model
The Hague WaterMax® System combines softening, filtration, and iron removal in one unit with advanced flow monitoring.
Aqua Pure
- Average Cost: $200 to $1,200
What We Love
Owned by 3M, Aqua Pure produces reliable, space-saving filtration systems that are easy to install and maintain. Known for quality components and long filter life, Aqua Pure is a solid choice for homeowners seeking clean drinking water without major renovation.
We rate it 4 stars for convenience, quality, and affordability.
Cost Information
Typical pricing depends on system capacity.
- Under-Sink Systems: $200 to $800
- Replacement Filters: $50 to $150
- Light Whole-Home Units: $900 to $1,200
Best Model
The Aqua Pure AP-DWS1000 delivers dual-stage filtration that removes chlorine, taste, and odor without reducing water pressure.
Aquasure
- Average Cost: $800 to $2,000
What We Love
Aquasure offers cost-effective whole-home and reverse osmosis systems that deliver solid performance for the price. It’s a favorite among DIY homeowners looking for reliable, easy-to-install filtration without a high upfront cost.
We rate it 4 stars for affordability, accessibility, and performance.
Cost Information
Average system prices fall between $800 and $2,000, depending on flow rate and filter type.
- Whole-Home Systems: $800 to $1,500
- RO Filtration Systems: $1,000 to $2,000
- Filter Replacements: $75 to $150
Best Model
The Aquasure Fortitude Pro Series offers multi-stage filtration and easy maintenance at an approachable price point.
Brita
- Average Cost: $100 to $500
What We Love
A household name for decades, Brita focuses on accessible, affordable water filtration for everyday use. Its countertop and pitcher filters are ideal for renters or small households. The company has recently expanded into faucet-mounted and under-sink filtration systems, maintaining the same reliability and convenience.
We rate it 4 stars for accessibility, affordability, and consistent consumer trust.
Cost Information
Brita systems are budget-friendly and widely available.
- Pitcher or Faucet Filters: $100 to $200
- Under-Sink Systems: $200 to $500
- Filter Refills: $30 to $80
Best Model
The Brita Hub™ Under-Sink Filtration System delivers purified drinking water with NSF-certified filters that last up to six months.
