Membrane Technologies and the NSF/ANSI Drinking Water Standa...
By Rick Andrew There are several membrane technologies that are widely used for treatment of drinking water. The NSF/ANSI Standards address these membrane technologies in a variety of ways and in a number of different […]
RO Elements and the NSF/ANSI Standards: Three End-Use Catego...
By Rick Andrew Reverse osmosis is one of the most widely employed water treatment technologies. The process utilizes a semipermeable membrane that allows water to pass through, but rejects particles and ions. Pressure is applied […]
New NSF/ANSI 244–Supplemental Microbiological Water Treatm...
By Rick Andrew We’ve all heard of boil water notices (BWNs). Each year, thousands of them are issued by various water systems across the United States (https://www.wqa.org/Portals/0/Media%20Kit/WQA%20Publications/Boil_Water_Notice_Study_Brochure_Feb16.pdf). These notices make it clear what people are […]
Standards for Activated Carbon POU and POE Products
By Rick Andrew Many industry professionals are familiar with NSF/ANSI 42 and NSF/ANSI 53. These standards have been around for over 30 years and there are large numbers of products certified to them. Given the […]
UV Sensors and Alarms
By Rick Andrew UV systems are often used for protection against potential microbiologically contaminated drinking water. These systems use UV energy to disrupt the DNA of microorganisms, which prevents them from reproducing. UV systems can, […]
Active Agents under NSF/ANSI 42 and 53
By Rick Andrew A man plummets headfirst from the open, rear hatch of a diving military aircraft, barreling headlong toward the ground as he picks up speed to terminal velocity. He manages to catch up […]
POU Commercial Modular Systems
By Michael Sheffield POU systems that are specifically designed for commercial use fall under the category of commercial modular systems. They are more complex than the typical POU systems utilized for residential use because of […]
Water Softener Structural Integrity Testing
By Rick Andrew Structural integrity is one of the key design aspects of POU and POE systems that is addressed by the NSF/ANSI DWTU Standards. Although it is not related to public health, structural integrity […]
Water Softeners and Chloride Discharge Under NSF/ANSI 44
By Rick Andrew Chloride discharge is a major issue in many water districts. Chloride can be difficult for wastewater treatment systems to treat and it can also cause some ecosystem harm when levels rise too […]
Testing POU RO Systems for Reduction of PFOA and PFOS
By Rick Andrew There’s been quite a bit of media and political attention focused on groundwater and drinking water contaminated by perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS). These compounds are synthetic, man-made chemicals that […]