NSF Guideline 533: Ingredients Used in Drinking Water Products

As the water industry’s leading testing and certification organization, we list a wide range of products for drinking water safety. NSF Guideline 533 expands this certification offering to ingredients used in drinking water products. A listing to NSF Guideline 533 means that your ingredients have been evaluated for health effects and are safe for use in drinking water products.

It can be challenging for ingredient suppliers to connect with product manufacturers, especially in foreign markets. An NSF listing for your ingredients on our public website exposes you to hundreds of drinking water product manufacturers worldwide. Your customers can also enjoy simpler NSF approvals for their products made with your ingredients. In most cases, no further testing or evaluation is required.

For product manufacturers, the use of NSF-listed ingredients enables quick sourcing of alternative ingredients and allows for increased formulation flexibility.

We test and certify a wide range of ingredients used in drinking water products, including:

• Resins
• Stabilizers
• Carbon black
• Masterbatches
• Impact modifiers
• Lubricants
• Fillers
• Antioxidants
• Solvents
• Titanium dioxides
• Processing aids
• Colorants

• Dedicated, highly trained account managers who focus on the success of your ingredient listing
• Unmatched technical expertise
• State-of-the-art laboratories
• Use of the internationally recognized and accepted NSF mark on your ingredient product labeling, literature and marketing materials
• Online project tracking for 24/7 visibility of your project status

Certification to NSF Guideline 533 is performed exclusively by NSF, the leading testing and certification organization in the industry. Our process includes:

• Technical review of ingredient information
• Testing determined on a case-by-case basis
• A production facility audit
• No annual testing requirement