drinking water analysis Articles

Public Water Systems (PWS), regulated by the United States Environmental Protection Agency (USEPA), provide drinking water to 90% of Americans. Water systems and laboratories testing drinking water for Safe Drinking Water Act (SDWA) compliance must be certified and must use USEPA approved methods, which are developed by the USEPA, other government agencies, universities, consensus method ...

Aug. 3, 2015

By Shimadzu Scientific Instruments Inc

Decentralisation of water supplies in developing countries is being promoted by international aid agencies. It is argued that decentralisation by a government close to the people will generate better project performance. This article compares the performance of piped water supply schemes run by the state governments and local government in central India and finds that the latter are running less ...

Jan. 1, 2012

By IWA Publishing

Nitrogen is naturally found in groundwater and surface water in the form of nitrate, nitrite, or ammonium. The EPA has established a maximum contaminant level of nitrate-nitrogen in potable water of 10ppm. This application presents results of UV-Vis analysis of nitrate concentrations in drinking water, ground water, and industrial wastewater, showing that the manual colorimetric method is ...

Mar. 21, 2017

By Shimadzu Scientific Instruments Inc

On October 30, 2015, the U.S. Environmental Protection Agency (EPA) announced that it is requesting comments on a proposal to revoke all tolerances for the insecticide chlorpyrifos. EPA issued this proposal in response to an August 10, 2015, writ of mandamus by the U.S. Court of ...

Nov. 2, 2015

By Bergeson & Campbell, P.C.

Ask the Expert: COD Analysis for Drinking Water Question: Why is Chemical Oxygen Demand (COD) a useful parameter for drinking water analysis? Answer: At very basic level Chemical Oxygen ...

May 8, 2015

By Camlab Limited

This application note demonstrates the use, performance, and compatibility of Shimadzu ultra-fast mass spectrometry for EPA Method 537 with an expanded compound panel of seven additional PFAS. A total of 27 PFAS were extracted, separated and detected with triple quadrupole mass spectrometers, LCMS-8045 and LCMS-8050. Recoveries of 86-106% (LCMS-8050) and 77-104% (LCMS-8045) were well within the ...

Apr. 1, 2019

By Shimadzu Scientific Instruments Inc

Regulatory changes have exerted deep impacts on public service provision. This paper aims to disentangle recent differences in the external production circumstances of Dutch regional water companies in order to identify the crucial regulatory factors influencing the supply of water to various users in the distribution area of the water company concerned. The analysis is carried out for various ...

Jan. 2, 2007

By Inderscience Publishers

A spatial autocorrelation analysis method was employed to process the spatial change of rural water supply over the past 19 years in the People's Republic of China. Statistical analyses indicate great achievements in rural water supply construction. Two main indices describing rural drinking water supply status, the Rural Popularization Rate of Tap Water and the Rural Popularization Rate ...

May 21, 2015

By IWA Publishing

Clean water is an increasingly scarce, essential resource nowadays and the demand for it is growing continuously. Though drinking water is checked regularly, the analysis is limited to the water quality at the time of analysis and the specific substances being tested for. Moreover, the threats of contamination and contaminated sites are growing steadily as more and more unknown and new ...

Jan. 31, 2019

By Sensatec GmbH

Campylobacter jejuni is one of the major causes of waterborne disease in Japan. A quantitative microbial risk assessment (QMRA) was conducted to evaluate the health risk caused by this pathogen in drinking water treated with a supposed advanced treatment process including ozonation and granular activated carbon adsorption. Coagulation-sedimentation, rapid sand filtration, ozonation, and ...

Mar. 25, 2014

By IWA Publishing

Disinfection by-products (DBPs) have been monitored in Calgary's drinking water for approximately 15 years. The variability of the DBPs has typically exhibited similar patterns over the period of monitoring. Due to the nature of the surface waters supplying the water treatment plants, the level of DBPs was largely influenced by surface runoff events where the level of natural organic matter (NOM) ...

Aug. 1, 2011

By IWA Publishing

The application of an SC-FAST introduction system to the analysis of natural and certified water samples is described. The SC-FAST system consists of an autosampler, a switching valve, a high efficiency PFA-ST nebulizer and Peltier-cooled cyclonic spray chamber to perform analysis by direct nebulization. The potential benefits of this introduction system are numerous and include increased ...

Oct. 28, 2011

By PerkinElmer, Inc.

The risks of 1,4‐dioxane (dioxane) concentrations in wastewater treatment plant (WWTP) effluents, receiving primarily domestic wastewater, to downstream drinking water intakes was estimated using distributions of measured dioxane concentrations in effluents from 40 WWTPs and surface water dilution factors of 1,323 drinking water intakes across the U.S. Effluent samples were spiked with an ...

May 24, 2013

By John Wiley & Sons, Ltd.

Nanotechnologies hold a lot of promise for improving the world and offering revolutionary advancements over traditional technologies that have not changed for decades, including for water quality analysis. Laboratory staff have known for a long time about the potential negative health impacts associated with Chemical Oxygen Demand (COD) testing using the traditional dichromate method, ...

Dec. 8, 2014

By Camlab Limited

Volatile Organic Compounds (VOCs) refer to a group of easily vapourised organic compounds. Under atmospheric pressure, these compounds boil below 250C. Studies have shown that prolonged exposure to the VOCs could increase the risk of various health problems, such as cancer. VOCs are commonly present in gasoline, dry cleaning solvents and degreasing agents. Due to improper storage, disposal or ...

Aug. 6, 2014

By Shimadzu Scientific Instruments Inc

Originally designed for target analysis, CARVER is an acronym for the vulnerability assessment elements of criticality, accessibility, recuperability, vulnerability, effect and recognisability. Every category is assessed for each component or subcomponent of a designated target. Scoring can be based on any scale but typically ranges from the lowest significance of 1, to the highest significance ...

Mar. 9, 2011

By Inderscience Publishers

This paper gives an overview of existing Life Cycle Assessment (LCA) studies of drinking water installations in Europe. The characteristics and results of the two most widely known and used studies, the VENOB study and the CREM study, are described in detail. Readers get a thorough understanding of the key issues and parameters of life cycle studies in this field. As the study results diverge ...

Oct. 18, 2006

By Inderscience Publishers

To ensure the protection of drinking water an understanding of the catchment processes which can affect water quality is important as it enables targeted catchment management actions to be implemented. In this study factor analysis (FA) and comparing event mean concentrations (EMCs) with baseline values were techniques used to asses the relationships between water quality parameters and linking ...

Dec. 1, 2010

By IWA Publishing

This research compares the environmental impact, in terms of greenhouse gas emissions, of using refillable polyethylene terephthalate (REF–PET) and non–refillable polyethylene terephthalate (NR–PET) bottles in the Norwegian soft drink and carbonated water market. A Microsoft Excel spread sheet was developed in close cooperation with Coca–Cola, Mack, Telemark Springwater, and three of the main ...

Sep. 11, 2013

By Inderscience Publishers

This study consisted of the determination of the trace metals and some physiochemical properties in drinking water samples from the Brong Ahafo region of the Republic of Ghana, where drinking water samples are not treated before it is consumed. The purpose was to ascertain the quality of water from these sources. Samples were taken from fifteen sampling points and analyzed for the following ...

Mar. 20, 2007

By Center for Environment and Energy Research & Studies (CEERS)