Water Systems

Guarantee the quality, performance, and safety of water products and systems with NSF’s extensive range of certifications and services.

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Use of NSF consulting services or attending NSF training sessions does not provide an advantage, nor is it linked in any way to the granting of certification.

Municipal Water Systems and Products
Have your municipal water products and systems thoroughly tested and certified. This includes everything from water storage tanks and reservoirs to water meters and individual components.
Plumbing Products
Verify the compliance of your plumbing products with the necessary standards and plumbing codes.
Materials and Ingredients
Verify the compliance of materials and ingredients with both North American and international standards.
Water Filtration
Test and certify water filtration and treatment systems, tailored for municipal, residential, or commercial use.
Treatment Chemicals and Media
Ensure global regulatory compliance by obtaining certification for your water treatment chemicals and media. The safety of drinking water is inherently linked to the quality of chemical aids and filtration media employed in its treatment.
Onsite Wastewater and Water Reuse Systems
Ensure that your on-site wastewater treatment or water reuse units meet all regulatory requirements.
Pool and Spa Products
Test and certify your pool and spa equipment and water treatment chemicals to guarantee their adherence to national health, building, and construction codes.
Water and Wastewater Standards
NSF's consensus standards cover an extensive range of products for the water and wastewater industries to help ensure the quality and safety of these products in the marketplace.
Information Security Management Systems
Strengthen information security for your business, satisfy customer expectations and do your part in protecting the water sector from risk.
Quality Management Systems
Demonstrate to your customers, regulators and the public your commitment to quality by establishing and certifying your management systems.

Resources

How NSF Can Help You

Get in touch to find out how we can help you and your business thrive.

What’s New with NSF

NSF Ends UK’s Three-Year Testing Gap with REG 31 Testing Designation
May 20, 2026
NSF’s Oakdale laboratory becomes the UK’s sole facility offering comprehensive BS 6920 and REG 31 testing, closing a critical drinking water safety gap.
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NSF Annual Review and Impact Report 2025 Now Live
April 20, 2026
NSF has published its Annual Review and Impact Report 2025, detailing the organization’s progress over the past year and outlining strategic priorities for 2026.
Read the Story
Researcher Identifies Promising Surrogate to Advance PFAS Testing
March 31, 2026
Surrogate expected to accelerate certification pathways for drinking water treatment units.
Read the Story

Water Systems

Explore Our Solution Areas

Municipal Water Systems and Products

Plumbing Products

Materials and Ingredients

Water Filtration

Treatment Chemicals and Media

Onsite Wastewater and Water Reuse Systems

Pool and Spa Products

Water and Wastewater Standards

Information Security Management Systems

Quality Management Systems

Resources

White Paper: Supply Chain Resilience with NSF Guideline 533

Understanding North American Plumbing Codes

On-Site Chemical Generation: Closing the Effluent Compliance Gap

How NSF Can Help You

What’s New with NSF

NSF Ends UK’s Three-Year Testing Gap with REG 31 Testing Designation

NSF Annual Review and Impact Report 2025 Now Live

Researcher Identifies Promising Surrogate to Advance PFAS Testing