Skip to main content

Seven Steps to Certification: Drinking Water Systems, Components and Chemicals

At NSF, we’ve been testing and certifying products for over 70 years. In that time, we have streamlined the process to make it less complicated.

We know time to market is important, and so is visibility into the certification process. That’s why we’ve broken it up into seven steps:

  • 1

    Application

    Your company submits an application.
  • 2

    Submission

    You provide product formulation, toxicology and product use information.
  • 3

    Review

    Our technical team reviews formulations and/or parts lists.
  • 4

    On-Site Audit

    We perform an on-site audit of the production facility and collect/request samples.
  • 5

    Testing

    Our laboratory conducts testing on the product.
  • 6

    Technical Evaluation

    We complete a final technical evaluation.
  • 7

    Certification

    NSF certification is granted (and maintained annually).

Certification for Municipal Water Products

Certify your products, components and materials used in the municipal water industry to meet health and safety requirements.

Drinking Water Treatment Chemical Certification

Certify your drinking water treatment chemicals to meet regulatory requirements around the world.

Ready To Begin the Process?

Contact us with questions or to receive a quote.

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 Welcomes Hanjun Kwon, Managing Director, APAC

    September 14, 2026
    Experienced business leader to drive sustainable growth, organizational development and operational excellence across the Asia-Pacific region.
    Read the Story
  • A mother and her son standing in the kitchen as she prepares food for lunch. He is eating a strawberry while he watches. Mom is Caucasian, in her 30s and the boy is mixed race Black and Caucasian, 3 years old. The focus is on the woman.

    NSF to Exhibit and Present at PACK EXPO International

    September 11, 2026
    NSF is proud to be part of PACK EXPO International 2026, the premier event bringing together packaging and processing leaders from across industries.
    Read the Story
  • Information Systems Security Association (ISSA) Welcomes NSF’s Brian Schultz into the 2026 Hall of Fame

    September 10, 2026
    Lifetime achievement recognition honors exceptional leadership and lasting contributions to the cybersecurity profession.
    Read the Story
  • NSF Welcomes Nicole Parent Haughey to Board of Directors

    September 10, 2026
    NSF's appointment of Nicole supports the organization's continued focus on long-term growth and transformation.
    Read the Story