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Professional Water Treatment Services in Wildwood, MO

Your home deserves water that is pure, healthy, and worry-free. At Castlewood Plumbing, we provide complete water treatment services in Wildwood and across West St. Louis County that transform the quality of your water and the comfort of your home. Whether you are tired of hard water stains, foul odors, or plumbing scale buildup, our team has the knowledge and technology to deliver lasting solutions that protect your home, your family, and your plumbing system.



With more than three decades of service excellence, we have helped thousands of Missouri homeowners enjoy cleaner, softer, and better-tasting water. Our approach is simple: we test, explain, and customize. From the first water test to professional installation, we focus on clarity, reliability, and results.

Experience the Benefits of Cleaner Water

Hard water is a common problem in our region. It contains minerals like calcium and magnesium that build up inside pipes, appliances, and fixtures. Over time, this buildup can reduce water flow, damage water heaters, and leave unsightly residue around faucets and sinks. Poor-quality water can also cause dry skin, dull hair, and unpleasant taste or odor.

When you invest in a professional water treatment system from Castlewood Plumbing, you will experience:

  • Softer skin and smoother hair after every shower
  • Longer lifespan for your plumbing fixtures and appliances
  • Spot-free dishes and cleaner laundry
  • Fresh-tasting drinking water directly from your tap
  • Reduced energy costs from efficient plumbing performance

We do not offer one-size-fits-all systems. Every home receives a tailored plan based on precise testing and your household’s unique water challenges.

Water Treatment Solutions That Deliver Results

At Castlewood Plumbing, our experts are trained to evaluate your water system and recommend the right treatment solution for your goals and budget. We partner with trusted manufacturers to bring you reliable, efficient equipment designed to perform for years.

Professional Water Softeners

Hard water affects everything it touches, from your shower doors to your water heater. Our high-efficiency water softeners eliminate the minerals that cause buildup, giving you water that feels smoother and performs better.

Benefits include:

  • Reduced mineral buildup in pipes and fixtures
  • Less detergent and soap needed for cleaning
  • Softer laundry and brighter colors
  • Increased efficiency of your water-using appliances

We install, repair, and maintain all types of softeners to ensure your system stays in top condition.

Whole-Home Water Filtration Systems

If your water smells like chlorine or leaves a film on dishes and fixtures, a whole-home filtration system may be right for you. These systems remove unwanted chemicals, sediments, and contaminants at the point where water enters your home, providing clean water to every faucet and appliance.



We offer several types of filtration systems, including:

  • Carbon filters that remove chlorine, odors, and chemical tastes
  • Sediment filters for dirt and rust particles
  • Reverse osmosis systems that deliver highly purified water

Our technicians will test your water, identify any issues, and install a filtration system that provides crystal-clear water throughout your home.

Advanced Water Conditioning

Some homeowners deal with more complex water problems such as acidic water, iron staining, or sulfur smells. Our water conditioning systems target these issues directly, improving taste, clarity, and overall quality.


If you notice red or brown stains in your sinks, a metallic taste, or an unpleasant odor, our team can perform a complete water analysis to pinpoint the cause. We then recommend conditioning systems that balance pH levels, remove iron, or neutralize sulfur gases for long-lasting improvements.

Water Testing and Analysis

A water treatment plan begins with accurate testing. Castlewood Plumbing provides comprehensive water testing to identify precisely what is in your water. We check for:

  • Hardness levels
  • Iron and manganese
  • Chlorine and chemical traces
  • pH balance
  • Sediment and turbidity

We take the time to walk you through the results and explain what each number means. From there, we recommend only the services you truly need. No confusion, no pressure, and no guesswork.

Why Homeowners Choose Castlewood Plumbing

Since 1993, Castlewood Plumbing has built a reputation for dependable service, honest advice, and superior craftsmanship. As a family-owned and operated company, we treat every customer like a neighbor and every job as a promise.



When you schedule water treatment service with us, you can expect:

  • Licensed and insured technicians with advanced training
  • Transparent pricing with no hidden fees
  • Prompt same-day appointments and 24/7 emergency support
  • Industry-leading products backed by strong warranties
  • Courteous professionals who respect your home

We believe great plumbing is not just about pipes and fittings; it is about delivering peace of mind and trust you can count on.

Areas We Serve

Our service area covers Wildwood and the entire western St. Louis County region, including:

  • Ballwin
  • Chesterfield
  • Ellisville
  • Eureka
  • Pacific
  • Fenton
  • St. Albans
  • Valley Park
  • Manchester
  • Town and Country
  • Kirkwood
  • Maryland Heights and the surrounding communities.

Wherever you are, our fully equipped trucks and experienced plumbers are ready to provide same-day service and solutions you can depend on.

How Our Water Treatment Process Works

We make the process straightforward and stress-free from start to finish:

  1. Water Evaluation: We begin by testing your home’s water and identifying any quality concerns.
  2. Consultation: Our technician reviews the results with you and discusses the best treatment options.
  3. Customized Plan: You receive personalized recommendations tailored to your goals, budget, and water needs.
  4. Professional Installation: We install your system quickly and efficiently, with minimal disruption.
  • Ongoing Maintenance: We offer maintenance programs to keep your water system working perfectly year-round.

We stand by our work with full satisfaction guarantees and warranties on parts and labor.

Maintenance and Repair for Water Treatment Systems

To keep your water system performing at its best, routine maintenance is essential. Castlewood Plumbing provides affordable maintenance and repair services for all major brands of water softeners and filtration units.

Our maintenance services include:

  • Cleaning and recharging of water softeners
  • Filter and membrane replacement
  • Resin bed inspections
  • Pressure and performance testing
  • Leak detection and repair

Our team helps you avoid costly breakdowns and ensures your system continues to deliver clean, consistent water every day.

Improve Your Water, Protect Your Home

The quality of your water impacts every aspect of daily life. From the way your laundry feels to the taste of your drinking water, the difference between untreated and treated water is remarkable.


Castlewood Plumbing has spent more than 30 years helping homeowners enjoy healthier water and longer-lasting plumbing systems. Our dedication to integrity, education, and craftsmanship has made us one of the most trusted names in plumbing throughout Wildwood and nearby communities.


If you are ready to stop fighting hard water stains or strange-tasting water, let our experts show you how simple and affordable a professional water treatment solution can be.

Frequently Asked Questions

  • What is the difference between a water softener and a water filter?

    A water softener removes hardness minerals such as calcium and magnesium that cause buildup and scaling. A water filter removes contaminants like chlorine, sediment, or chemicals. Many homes benefit from having both for complete water protection.

  • How often should I have my water tested?

    We recommend testing your water at least once a year, or any time you notice changes in taste, odor, or appearance. Regular testing helps ensure that your treatment system is working properly and your water remains safe.

  • Can I drink water from a whole-home filtration system?

    Yes. A properly installed filtration system provides clean, great-tasting water at every tap. Many homeowners choose these systems to eliminate bottled water and improve overall health and convenience.

  • Do water softeners require a lot of maintenance?

    Not at all. Most systems only need periodic salt refills and occasional cleaning. Our maintenance plans make it easy to keep your system running efficiently without hassle.

  • How long does a typical water treatment installation take?

    Most installations can be completed in a single visit, usually within a few hours. Our technicians arrive on time, work efficiently, and ensure your new system is fully tested before leaving.

Schedule Your Water Test Today

Your path to better water begins with a call to the experts at Castlewood Plumbing. Contact us today at (636) 394-6737 or request an appointment online. Our friendly team will schedule a convenient time to test your water and provide honest recommendations for improvement.


Enjoy cleaner, softer, and healthier water today with Castlewood Plumbing — where your comfort and satisfaction always come first.