Water...It's What We do

National Water Service

Wide Range Of Services

Trusted experts delivering the best in water, plumbing, and well services

Water
Treatment

Delivering advanced water treatment solutions for cleaner, safer water in your home or business. Trust our experts for superior water quality and healthier living.      

Water
Treatment

Delivering advanced water treatment solutions for cleaner, safer water in your home or business. Trust our experts for superior water quality and healthier living.      
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Plumbing &
Mechanical

Expert plumbing and mechanical services designed to ensure efficiency and reliability. From repairs to installations, trust us for quality workmanship every time    

Plumbing &
Mechanical

Expert plumbing and mechanical services designed to ensure efficiency and reliability. From repairs to installations, trust us for quality workmanship every time    
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Well & Pump
Service

Specializing in well and pump services to ensure reliable water flow for your home or business. Trust our experts for installations, repairs, and maintenance you can count on

Well & Pump
Service

Specializing in well and pump services to ensure reliable water flow for your home or business. Trust our experts for installations, repairs, and maintenance you can count on
View Services
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Best in water treatment, plumbing, and well pump services

For over 45 years, National Water Service has been the trusted provider of water treatment, plumbing, and well pump services for residential homeowners and commercial properties throughout Maryland, DC, and Northern Virginia. Our team specializes in water filtration, purification systems, and plumbing solutions that ensure clean, safe, and reliable water for homes and businesses. Whether you're a homeowner improving your water quality or a commercial business managing complex plumbing systems, we deliver expert service tailored to your specific needs.​

Why Choose Us?

Quality, Trust, and Expertise in Every Water Related Service

At National Water Service, we provide reliable and customized water treatment, plumbing, and well pump services for both residential homeowners and commercial clients. We understand the importance of clean, safe water, and we offer solutions that ensure optimal performance for your home or business.

We prioritize excellence in every aspect of our work, which is why we deliver the following essential qualities to our customers:

Water Treatment

Ensure Clean, Safe Water for Your Property

Our water treatment services are designed to improve the quality of your water, whether you’re looking to filter, purify, or soften it. We specialize in providing tailored solutions such as reverse osmosis systems, water softeners, whole-house filtration systems, and more. Whatever your water treatment needs are, we provide efficient and reliable systems to improve the health and safety of your water supply.

  • Filtration & Purification: Remove harmful contaminants and ensure safe drinking water for your property.
  • Water Softening: Eliminate hard water minerals to protect your plumbing and appliances.
  • Custom Solutions: We design water treatment systems tailored to your unique water quality issues.

For more information on Water Treatment Services, please visit our Water Treatment Section.

Plumbing & Mechanical Services

Reliable Plumbing Solutions for Every Property

Our plumbing services cover all aspects of plumbing and mechanical systems for both homes and businesses. Whether you need repairs, installations, or regular maintenance, we ensure your plumbing system runs smoothly. From fixing leaks and installing pipes to addressing complex drainage issues, our team is ready to tackle all your plumbing challenges.

  • General Plumbing Repairs: Fix leaks, clogs, and damaged pipes efficiently.
  • Pipe Installation & Replacement: Upgrade your plumbing systems with modern, durable materials.
  • Drain Cleaning & Maintenance: Keep your drains clear and prevent future blockages.

For more information on Plumbing & Mechanical Services, please visit our Plumbing Section.

Well Pump Services

Efficient Well Pump Solutions for Reliable Water Supply

As experts in well pump systems, we offer comprehensive services to install, maintain, and repair well pumps for both residential and commercial properties. Our experienced technicians ensure your well pump operates efficiently, providing a consistent and reliable water supply for your home or business.

  • Well Pump Installation: Ensure optimal performance with the right well pump for your property.
  • Well Pump Repair & Maintenance: Keep your existing well pump in top working condition.
  • Pump Efficiency: Maximize the life and efficiency of your well pump through expert service.

For more information on Well Pump Services, please visit our Well Pump Section.

Popular Services

Our Most Popular Services Chosen by Homeowners and Businesses

Our happy customers

Decades of Plumbing Excellence Trusted by Thousands

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Our Accreditation's

water quality association Maryland
member EWQA

Water... It's What We Do!

Customer Love

Don't Just Take Our Word For It

Responsive

Our water heater went bad late on a Friday night. When we called National Water Service early on Saturday, the owner answered the call and immediately sent someone to replace it. We were so thankful for their responsiveness and excellent service. I highly recommend this company for all of your plumbing and water system needs.

Knowledgeable

I can’t say enough about National Water Service. The team is very knowledgeable about the water treatment business. Great service, courteous techs, and on time for appointments. In emergencies NWS has always been there for me. Thank you and keep up the good work. I would highly recommend!!!🤩🤩🙌🏽

Cost-Effective

I had a leak in my whole house water filtration system that no plumber could figure out. Enter Peter and Christian from National Water Service, who diagnosed the problem in short order AND came up with a cost effective resolution! They were knowledgeable, professional, personable and great to work with! Thank you!

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