| For previous articles in this category, click on a link below. |
| Water Matters: A New Standard for Pool Chemicals August 2015 |
| Water Matters: Contaminant Reduction Claims Requirements – POU RO Systems July 2015 |
| Water Matters: Update on NSF/ANSI 419 Public Drinking Water Equipment Performance–Filtration June 2015 |
| Water Matters: NSF/ANSI 55 Class A Versus Class B UV Systems May 2015 |
| Water Matters: Standards for POU/POE Activated Carbon Systems April 2015 |
| Water Matters: Certification of Components versus Systems March 2015 |
| Water Matters: Efficiency of Water Softeners under NSF/ANSI 44 February 2015 |
| Water Matters: New Draft Standard: NSF 419 Public Drinking Water Equipment Performance—Filtration January 2015 |
| Water Matters: POU Systems and Arsenic Reduction December 2014 |
| Water Matters: Update on Emerging Compounds/Incidental Contaminants November 2014 |
| Water Matters: A New Standard for Evaluation of Scale Control Equipment October 2014 |
| Water Matters: Bottled Water Filters and NSF/ANSI 53 September 2014 |
| Water Matters: Water/Spray Park, Pool and Spa Industry Update 2014: NSF/ANSI Standard 50 Water Quality Test Devices, Chemicals & Materials August 2014 |
| Water Matters: A Closer Look at a New Sustainability Standard for Water Contact Products July 2014 |
| Water Matters: Two Standards for POU Activated Carbon Systems June 2014 |
| Water Matters: Treatment Capacity and NSF/ANSI 42 and 53 May 2014 |
| Water Matters: An Opportunity to Improve Capacity and Efficiency Testing of Cation Exchange Water Softeners April 2014 |
| Water Matters: Sustainable Manufacture of Water Treatment Chemicals—A Pathway to Sustainability March 2014 |
| Water Matters: NSF 401 Drinking Water Treatment Units-Emerging Compounds/Incidential Contaminants February 2014 |
| Water Matters: HACCP for Building Water Systems January 2014 |
| Water Matters: Testing POU RO Systems for Pentavalent Arsenic Reduction December 2013 |
| Water Matters: Updates to NSF/ANSI 58 Reverse Osmosis Drinking Water Treatment Systems November 2013 |
| Water Matters: NSF/ANSI DWTU Standards October 2013 |
| Water Matters: Evaluation of Water Coolers September 2013 |
| Water Matters: Iron and Manganese Reduction Under NSF/ANSI 42 August 2013 |
| Water Matters: POU RO Efficiency and Daily Production Rate July 2013 |
| Water Matters: Brand Protection through Claims Verification on POU Carbon Filters June 2013 |
| Water Matters: Building a POU/POE Testing Lab - Many Pieces of the Puzzle May 2013 |
| Water Matters: Where's the Manual? Look at Literature Requirements for Fountain Beverage Drinking Water Treatment Systems April 2013 |
| Water Matters: An Emerging Standard for Emerging Compounds and Incidental Contaminants March 2013 |
| Water Matters: The Hard Facts about NSI/ANSI 44: Residential Cation Exchange Water Softeners February 2013 |
| Water Matters: The Significance of On/Off Cycling in Testing POU Filter Systems January 2013 |
| Water Matters: Testing POU Systems Incorporating Treatment Media for Arsenic Reduction December 2012 |
| Water Matters: The Scope of NSF/ANSI 58 POU RO for Fresh Water November 2012 |
| Water Matters: An Overview of Global Standards, Protocols and Guidelines for POU and POE Microbial Reduction Claims October 2012 |
| Water Matters: Testing Cyst Reduction Claims for Bottled Water Filters September 2012 |
| Water Matters: NSF/ANSI 50-Equipment for Swimming Pools, Spas and Recreational Water Facilities August 2012 |
| Water Matters: POU RO System Daily Production Rate July 2012 |
| Water Matters: POU/POE Extraction Testing with and without Media June 2012 |
| Water Matters: Ultraviolet Disinfection Systems-How NSF/ANSI 55 Relates to LT2 May 2012 |
| Water Matters: Testing POU Systems for Reduction of Radioactive Iodine April 2012 |
| Water Matters: Pressure-Drop Measurement for POE Systems March 2012 |
| Water Matters: Ecolabeling and Verification in Response to EO 13514 February 2012 |
| Water Matters: Contaminant Reduction Testing for Carafe-Style POU Sysems January 2012 |
| Water Matters: Flowrates and the NSF/ANSI DWTU Standards December 2011 |
| Water Matters: POU RO Systems TDS Reduction Testing November 2011 |
| Water Matters: Tracking International Requirements for POU and POE October 2011 |
| Water Matters: Protocols: A Certification Alternative September 2011 |
| Water Matters: Brazilian Requirements for POU/POE Products July 2011 |
| Water Matters: Certification Options for Small Potable Water Systems June 2011 |
| Water Matters: Fail Safe In NSF/ANSI 55 May 2011 |
| Water Matters: Chloramine Reduction and Fountain--Beverage Filtration Systems April 2011 |
| Water Matters: Water Softener Efficiency and Future Trends March 2011 |
| Water Matters: POU/POE Treatment of Chromium in Drinking Water February 2011 |
| Water Matters: Testing of Ultrafiltration Systems January 2011 |
| Water Matters: Testing POU RO Systems for Pentavalent Arsenic Reduction December 2010 |
| Water Matters: Testing Residential Distillation Systems November 2010 |
| Water Matters: All Aboard! Testing and Certification of Treatment Trains October 2010 |
| Water Matters: Water Coolers and the NSF / ANSI Standards September 2010 |
| Water Matters: Product Certification--A Competitive Advantage for POU/POE Manufacturers August 2010 |
| Water Matters: Home Treatment and Reuse of Residential Wastewater July 2010 |
| Water Matters: Testing Manufacturers' Claims on Activated Carbon Systems June 2010 |
| Water Matters: NSF/ANSI 55 Requirements for Ultraviolet Systems May 2010 |
| Water Matters: Certification of Commercial Fountain Beverage Water Treatment Systems April 2010 |
| Water Matters: 2010: a New Year, a New Overview of POU/POE Certification March 2010 |
| Water Matters: Consumer Protection through Certification to NSF/ANSI DWTU Standards February 2010 |
| Water Matters: POU RO Systems: Claims Testing Under NSF/ANSI 58 January 2010 |
| Water Matters: Treatment of Groundwater for Residential Purposes--Certification of Contaminant Reduction Performance December 2009 |
| Water Matters: Use of Alternate Filter Medias in Pool and Spa Filters November 2009 |
| Water Matters: Product Certification, GFSI, HACCP and Training--The DNA of Beverage Quality October 2009 |
| Water Matters: POU and POE Standards in Canada September 2009 |
| Water Matters: POU/POE Test Rig Considerations August 2009 |
| Water Matters: Daily Production Rate and Efficiency Rating of POU Reverse Osmosis Systems July 2009 |
| Water Matters: Material Safety of Activated Carbon June 2009 |
| Water Matters: Testing POU/POE Ultraviolet Drinking Water Treatment Systems Under NSF/ANSI 55 May 2009 |
| Water Matters: Mechanical Filtration Performance Testing of POU/POE Systems April 2009 |
| Water Matters: Testing POU/POE Media Filters for Arsenic Reduction March 2009 |
| Water Matters: Active Agents under NSF/ANSI 42 and 53 February 2009 |
| Water Matters: Certification of POE and POU Hollow-Fiber Ultrafiltration Systems January 2009 |
| Water Matters: Requirements for POE Water Softeners under NSF/ANSI 44 December 2008 |
| TDS Reduction Testing of POU Reverse Osmosis Systems November 2008 |
| Contaminant Reduction Testing of Pour-Through Pitcher Filter Systems October 2008 |
| Chemical and Mechanical Reduction Claims on Carbon Block Filters September 2008 |
| Laboratories for POU and POE - The Analytical Side August 2008 |
| Non-Softening Scale Control Devices--Standards and Lack Thereof July 2008 |
| Pharmaceuticals in Water June 2008 |
| Chloroform as a Surrogate for Volatile Organic Contaminants May 2008 |
| Water Matters: Water China 2008 April 2008 |
| Pressure Drop: An Important Measurement for Point of Entry Systems March 2008 |
| In-Place Cleaning Testing of Residential Distillers under NSF / ANSI 62 February 2008 |
| Total Dissolved Solids Reduction Testing of Point of Use Reverse Osmosis Systems under NSF/ANSI 58 January 2008 |
| Water Efficiency and the NSF / ANSI DWTU Standards December 2007 |
| Ashes to Ashes, Dust to Dust: The Use of Test Dust in NSF/ANSI 42 and 53 November 2007 |
| Point of Entry Systems and the NSF / ANSI Standards October 2007 |
| Comparison of Standards Setting Practices: International, Regional and National September 2007 |
| Certification of Drinking Water Treatment Systems that Utilize Active Agents August 2007 |
| Membership in the NSF International Joint Committee on Drinking Water Treatment Units June 2007 |
| Trademark Protection, A Case Study May 2007 |
| Classic Literature - Moby Dick, A Tale of Two Cities and My New Water Treatment System Manual? April 2007 |
| Lead Reduction at pH 8.5 March 2007 |
| Certification of Products with Multiple Technologies February 2007 |
| Testing Pour-Through Pitchers for Contaminant Reduction Claims January 2007 |
| Minimum Claims Under the NSF/ANSI DWTU Standards December 2006 |
| New European Standards for POU and POE Devices October 2006 |
| Contaminant Reduction Testing of POU Reverse Osmosis Systems Under NSF/ANSI 58 July 2006 |
| Water China, 2006 June 2006 |
| Arsenic Reduction Claims for Media Filters under NSF / ANSI 53 May 2006 |
| The Who, What, When, Why and How of the WRAS Approval Process April 2006 |
| Efficiency of Water Softeners Under NSF/ANSI 44 March 2006 |
| Chlorine Reduction Testing February 2006 |
| A `Hard` Standard for Softeners NSF/ANSI 44 January 2006 |
| Material Safety and the NSF/ANSI DWTU Standards December 2005 |
| Certification of Water Treatment Systems for the Food Service Industry November 2005 |
| Contaminant Reduction Testing of Residential Distillers Under NSF/ANSI 62 October 2005 |
| Bottled Water Certification Audits September 2005 |
| Standards Requirements for POE vs. POU Systems August 2005 |
| Testing for Chloramine Reduction Requires In-Place Chloramine Formation July 2005 |
| Certification of Activated Carbon and Products Containing Activated Carbon June 2005 |
| Ultraviolet Water Disinfection -- It’s All About the Dose May 2005 |
| Contaminant Reduction Claims on Reverse Osmosis System Post-Filters April 2005 |
| Efficient Certification with Product Bracketing March 2005 |
| Conformance to the NSF/ANSI DWTU Standards of Complete Systems Versus Components February 2005 |
| Cyst Reduction, Turbidity Reduction, Nominal Particulate Reduction, Class I January 2005 |
| A New Standard for Shower Filters December 2004 |
| Water Treatment Technologies: A Bottled Water Perspective November 2004 |
| Minimum Performance Requirements, Minimum Service Flow: Requirements that must not be minimized! October 2004 |
| Refrigerator Filters—Unique Products, Unique Certification September 2004 |
| Softener Certification -- Standard 44 Capacity Testing August 2004 |
| Structural Integrity and the DWTU Standards July 2004 |
| Lead and the Corrosion It Leaves Behind -- What the Washington, D.C., Case Taught Us June 2004 |
| How You Can Have an Impact on DWTU Standards May 2004 |
| Helping the Consumer Make an Informed Decision April 2004 |
| The Art and Science of Contaminant Reduction Test Methods March 2004 |
| Witness for Certification -- Product Testing Is Controlled, But Not Confined February 2004 |
| ANSI/NSF Standard 53 Cyst Test Dust Reduction -- The End of an Era January 2004 |
| Literature Requirements and DWTU Standards December 2003 |
| An Inside Look at the Certification of Hybrid Systems November 2003 |
| Arsenic and the ANSI/NSF Drinking Water Treatment Unit Standards October 2003 |
| Chemical Additives: A Closer Look at Product Testing for Standard 60 September 2003 |
| Water Treatment in Food Service Establishments August 2003 |
| Perchlorate -- New Contaminant Reduction Claims for DWTU Standards July 2003 |
| Water Coolers--The Meeting of Many Standards June 2003 |
| Microbiological Water Purifier Testing--The Quest for Surrogate Organisms May 2003 |
| A Matter of Public Trust -- A Review of the NSF Conference on POU/POE for SDWA Compliance April 2003 |
| Material Extraction Testing of Activated Carbon: A Tale of Two Standards March 2003 |
| Driving Safer Cars, Drinking Safer Water February 2003 |
| DWTU Standards and Materials Disclosure January 2003 |
| ANSI/NSF Standards 42 and 53 Test Waters: Water is Water, Isn’t It? December 2002 |
| The Role of ANSI in Drinking Water Product Standards, Testing and Certification November 2002 |
| Bottled Water -- A Primer to Proper Operations October 2002 |
| China -- A Changing Landscape for Manufacturers and Certifiers September 2002 |
| Arsenic: Centrally Managed POU as a Compliance Method -- A Feasibility Study August 2002 |
| An Overview of the Standard for RO Treatment Technologies July 2002 |
| The New ANSI/NSF Standard 55 June 2002 |
| New ANSI/NSF Draft Standard for Shower Filtration Systems May 2002 |
| Water Softeners & Septic Tanks: A Compatible Combination? April 2002 |
| Arsenic Update for Manufacturers and Dealers March 2002 |
| Testing of Microbiological Water Treatment Devices February 2002 |
| Drinking Water System Components: Testing & Certifying January 2002 |
| Water Wells and Unique Treatment Needs December 2001 |
| At the Center of It All: Testing New Water Technologies November 2001 |
| Bottled Water Filters: A Class of Their Own October 2001 |
| Asia on the Move September 2001 |
| Chromium: The Risk & The Fix August 2001 |
| Protocol to Standard 53: Radon Reduction for Point-of-Use DWTU`s July 2001 |
| Proposed Changes to ANSI/NSF Standard 55 -- Ultraviolet Microbiological Water Treatment Systems June 2001 |
| Standard 50: Meeting the Needs of the Pool & Spa Industries May 2001 |
| Building Steam for the Revision of ANSI/NSF 62 April 2001 |
| POU/POE Water Treatment Devices -- Increasing Awareness Among the Masses March 2001 |
| ANSI/NSF Standard Revisions Improve Real World Application February 2001 |
| Drinking Water Treatment Standards -- The Process of Certification January 2001 |
| Testing for Lead Contamination -- Making Sense of a Complex Matter December 2000 |
| Proposed Arsenic Protocol -- Gauging the Potential Dangers November 2000 |
| Chloramines and their Presence in Water -- Meeting the New Standards October 2000 |
| France Launches Certification Program for DWTUs -- Meeting American Standards September 2000 |
| New Regulation Opens Japan to Plumbing Products Manufactured Worldwide August 2000 |
| Filtration -- Defining ``Absolute`` and ``Nominal`` July 2000 |
| Materials Safety Kick-Off June 2000 |
| Is Your Water Bugged? The Scoop on Developing a New Microbiological Reduction Standard May 2000 |
| Bringing Industry Users to the Environmental and Public Health Certification Process April 2000 |
| Update on Package Drinking Water Treatment Systems March 2000 |
| Component Certification between Systems February 2000 |
| Certifying Components Water and Systems January 2000 |
March 29, 2020
