In 2007, the NSF Intl. Drinking Water Treatment Unit Joint Committee revised the NSF/ANSI Standard 53 protocol for pH 8.5 lead reduction based on a substantial amount of research on particulate and colloidal lead. The research conducted by the NSF task group revealed a great deal of inconsistency in the amount of particulate lead formed from batch to batch and from laboratory to laboratory due to the precipitation of this element from the solution.
Testing and developing a lead-reduction filter for gravity pitchers
Recently, the U.S. Environmental Protection Agency (EPA) announced it had worked with three New Jersey school districts to successfully lower lead levels in their drinking water. Testing in 2010 and 2011 found elevated lead levels in approximately 8% of the outlets it tested at the Atlantic City, Union City and Weehawken school districts. The districts resolved the problem through a variety of methods, from filtration to replacing fixtures to simply shutting off those outlets. The latest round of testing showed that lead levels were within acceptable EPA limits.
Lead has been a hot topic for consumers and the media for many years. We all have heard about the deterioration of U.S. water distribution systems, lead service lines, extremely high levels of lead in Washington, D.C.’s drinking water because of a change from chlorine to chloramine, lead in paint, lead in toys, new lead content laws in California and Vermont (soon to be national)—concerns about lead that will never go away.
Challenges in creating a consistent lead certification protocol
Worldwide, engineered plastic connectors and tubing are used in the water quality industry for a host of residential, commercial and industrial applications. From water treatment and filtration to beverage dispensing and ice making, there are several sound reasons for their widespread use.
Low-lead plastic products are ready for federal lead legislation
Many manufacturers or distributors of ball, butterfly, gate, check, control, globe, plug, relief, regulator, pinch or diaphragm valves have been or may be required by state or federal law to comply with low-lead requirements. If you have been required by the state to have your valves comply with low-lead regulations, there may be some confusion on where to start and how to proceed.
Following are suggestions that will help facilitate a quicker certification as well as help eliminate headaches in the long run with the certification.
Researching materials leads to a smoother compliance process
With the compliance deadline approaching for California’s AB 1953, Stephanie Harris, managing editor of Water Quality Products, recently spoke with NSF’s technical manager of water distribution systems certification program, Pete Greiner, to gain insight on the new law and Annex G to NSF/ANSI Standard 61.
Industry Insight: Pete Greiner
The interest in reducing environmental lead exposure is evident with the recent revision by the U.S. Environmental Protection Agency (EPA) for the nation’s Air Quality Standards, which were lowered from 1.5 to 0.15 ug of lead per cubic meter of air. “With these stronger standards, a new generation of Americans is protected from harmful lead emissions, especially children,” said EPA Administrator Stephen L. Johnson. The same goal was desired for the drinking water lead standard, which the EPA lowered in 1998 from 50 to 15 µg of lead per liter of water.
Elevated levels of lead in drinking water occur despite government action
Offering high-quality, custom-designed options to best meet consumer demands
Industry professionals share their outlooks on the state of the water treatment and bottled water industries
There are many ways drinking water changes on its path to consumers’ taps. Corrosion of metal piping materials is one of the most significant causes of degradation. The more noticeable aesthetic degradation occurs as a result of oxidation of iron piping producing red, yellow or “rusty” water.
Lead in Seattle school district’s drinking water prompts major review