Water Systems Certification
Test your water products from source to tap to sewer and get them compliant with the most stringent national and international standards through NSF’s laboratories worldwide.
NSF is at the forefront of establishing standards for water products, gathering joint committees of experts, authorities, manufacturers and users. As such, NSF is a leader in the certification of water product quality and safety. Discover how we ensure compliance with the most stringent standards for performance, efficiency, and sustainability leveraging NSF's local expertise for expedited and cost-effective processes.
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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.
What’s New with NSF
NSF Ends UK’s Three-Year Testing Gap with REG 31 Testing Designation
May 20, 2026NSF’s Oakdale laboratory becomes the UK’s sole facility offering comprehensive BS 6920 and REG 31 testing, closing a critical drinking water safety gap.