NSF/ANSI 55 for UV Systems Including LED UVC
By Rick Andrew NSF/ANSI 55 Ultraviolet Microbiological Water Treatment Systems was first adopted as an American National Standard almost 20 years ago in May, 1991. At that time (and for years afterward), the dominant technology […]
RO Systems and Lead Reduction
By Rick Andrew In January, this column reported on an update to the requirements in NSF/ANSI 53 for the lead reduction claim. Essentially, the Joint Committee on Drinking Water Treatment Units revised the pass/fail criteria […]
Water Softeners – It’s All in the Family
By Rick Andrew Many of us are familiar with the concept of product families. This idea runs across many industries and product types and has common themes. Small-, medium- and large-size versions of a product […]
Testing Anion Exchange Systems for PFOA and PFOS Reduction
By Rick Andrew One of the technologies used to treat PFAS in water is anion exchange. Recognizing the relevance and importance of this technology in combating the growing occurrence and detection of PFAS in water, […]
Upcoming Adjustment to Lead Reduction Requirement under NSF/...
By Rick Andrew Lead in drinking water continues to be a major concern for the general public, especially those served by public water supplies with aging infrastructure. There are several ongoing initiatives to investigate potential […]
LED UV Systems and NSF/ANSI 55 Update
By Rick Andrew In May, this column discussed the fact that historically, NSF/ANSI 55 was limited in scope to POU and POE UV systems using low-pressure mercury UV sources. It described progress regarding updating that […]
Testing Mechanical Water Filtration Systems for Microbial Re...
By Rick Andrew Healthcare facilities have increased focus on infection prevention in recent years. Many of their patients are immunocompromised and therefore more susceptible to infection, so this increased focus can have a significant impact […]
By Rick Andrew PFAS, which as many of us have learned is short for per- and polyfluoroalkyl substances, continues to be a major topic in the news media and in industry discussions. PFAS compounds are […]
Evaluation of Cyst Reduction for Bottled Water Filters
By Rick Andrew The NSF/ANSI Drinking Water Treatment Unit (DWTU) standards include evaluation criteria for a wide variety of technologies and products. Requirements for a spectrum of products ranging from system components to multi-stage POU […]
Evaluation of Water Conditioning Devices for Pool and Spa Ap...
By David Nance In order to meet market demand, NSF has developed a testing protocol to evaluate various technologies employed as water conditioning devices in pools and spas. This protocol is described in NSF’s Component […]