drinking water standard Articles
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Drinking Water Standards
The most important point of departure for drinking water standards is the World Health Organisation Guidelines for Drinking Water Quality. These are widely used throughout the world with the exception of parts of North America. WHO’s Guidelines have evolved over a period of 50 years from standards to guidelines, reflecting the fact that they have no legal force. The WHO emphasises that it ...
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New Zealand Drinking Water Standards
The availability of safe drinking water is an essential requirement for all New Zealanders, irrespective of their status. The NZ Drinking Water Standards, as set by the Ministry of Health, provide requirements for drinking water safety by stipulating; (1) maximum amounts of substances or organisms or contaminants or residues that may be present in drinking-water, (2) criteria for demonstrating ...
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What Are New Zealand Drinking Water Standards?
Drinking water standards specify the desired quality standards for water used for drinking purposes. The Drinking-water Standards for New Zealand (DWSNZ) is reinforced by Section 69A of the Health Act 1986 which advocates for the provision of potable drinking water to people of New Zealand and that the suppliers observe compliance with the desired drinking water standards. The DWSNZ was developed ...
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Loveland Case Study (In SItu Gas Thermal Remediation (GTR™))
The Loveland Sinclair gasoline station was selected for In-Situ Thermal Remediation (ISTR) using Gas Thermal Remediation (GTR) technologies. The GTR remediation system was designed to target a treatment area of approximately 14,000 square feet and includes a treatment volume of approximately 3,100 cubic yards. Vadose and saturated zone impacts, including a thin layer of light non-aqueous phase ...
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EPA Confirms it will set MCLs for PFAS and PFOA
U.S. Senator Tom Carper (D-DE), a top Democrat on the Senate Environment and Public Works Committee (EPW) applauds an announcement from David Ross, EPA Assistant Administrator for water, indicating the Agency intends to set a legal limit for two toxic per- and polyfluoroalkyl substances (PFAS) chemicals found in drinking water. Specifically, the Agency will regulate perfluorooctane sulfonate ...
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Searching for a sustainable arsenic mitigation strategy in Bangladesh: experience from two upazilas
Arsenic concentrations of tubewell water that exceed the Bangladesh Drinking Water Standard pose a serious health problem for millions of people in Bangladesh. Groundwater is the source of drinking water for 98% of the population. The main object of the study was to review the status of the provided options, which were distributed during 1999?2001 in two upazilas. It was observed that ...
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Water quality for irrigation and drinking water use of Aflaj in Oman
The Sultanate of Oman is an arid country with scarce water resources mainly consisting of groundwater. Aflaj are artificial canals constructed centuries ago to transfer horizontally the groundwater to a location at the surface. The water quality of these Aflaj is a very important factor to be considered for healthy and safe use of this water. This paper aimed to study the characteristics of the ...
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Public health perspectives of channelized and unchannelized headwater streams in central Ohio: a case study
Headwater streams constitute the majority of watersheds in the United States and many in the midwest have been channelized for agricultural drainage. Public health implications of water chemistry and aquatic insects within channelized and unchannelized headwater streams have not been explored. We sampled water chemistry and aquatic insects in two channelized and two unchannelized headwater ...
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Towards an effective protection of groundwater resources: putting policy into practice with the drinking water protection file
Groundwater in the Netherlands is a major resource for drinking water. As such it must be carefully monitored and managed. Evaluation of the European Water Framework Directive (EU-WFD) showed that protection of this valuable resource needs improvement. The Drinking Water Protection File identifies necessary measures needed per water abstraction site. The Protection File is part of the Dutch ...
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Spatio-temporal assessment of groundwater level and quality in urban coastal city Puri, India
Puri city is situated on the shoreline of Bay of Bengal and groundwater is the only source available to meet the city water supply mainly from two demarcated water fields. Due to the anthropogenic activities and absence of sewerage system, groundwater quality is deteriorating through open discharges of domestic waste, open defecation, septic tanks, soak pits, contaminated water pools, unorganized ...
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WQP magazine`s featured article written by company president
The interest in reducing environmental lead exposure in 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 cubiv meter of air. "With these stronger standards, a new generation of Americans is protected from harmful lead emissions, especially children," said EPA Administration ...
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Drinking water standard revision catches up with UV-LED
New criteria for microbial reduction An international standard on drinking water treatment has been updated following developments and the roll-out of UV-LED (ultraviolet-light emitting diode) technology. NSF International, the body accredited by the American National Standards Institute (ANSI), has established new criteria for the use of UV-LED technology for microbial reduction. The standard ...
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Drinking Water Quality
Drinking water or potable water is water of sufficiently high quality that it can be consumed or used without risk of immediate or long term harm. In most developed countries, the water supplied to households, commerce and industry is all of drinking water standard, even though only a very small proportion is actually consumed or used in food preparation. Over large parts of the world, humans ...
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Impact of European Water Framework Directive Article 7 on Drinking Water Directive compliance for pesticides: challenges of a prevention-led approach
Article 7 of the European Water Framework Directive (WFD) promotes a prevention-led approach to European Drinking Water Directive (DWD) compliance for those parameters that derive from anthropogenic influences on raw water quality. However, the efficacy of pollution prevention interventions is currently uncertain and likely to be variable, which makes absolute compliance with the drinking water ...
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Augmenting Water Supply Systems
Direct use of recycled water to augment urban water supply systems entails pumping water into the distribution system or blending with the conventional supply at the water treatment plant. The recycled water needs to be treated to drinking water standards or better, including advanced treatment processes to remove trace organics and chemicals. The City of Windhoek in ...
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Performance assessment of modified biosand filter with an extra disinfection layer
Biosand filters (BSFs) have been used widely as an efficient, inexpensive, and appropriate point-of-use technology. Several organizations are promoting filters without adequate testing, which may not lead to sufficiently safe devices. The objective of this study was to evaluate the performance of a modified biosand filter (MBSF) with an extra disinfection layer (brass or zero valent iron ...
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Quality assessment of rooftop runoff and harvested rainwater from a building catchment
A major obstacle to the promotion of rainwater harvesting is chemical and microbiological concerns. To determine its suitability as an alternative water resource, water quality parameters such as pH, turbidity and metal ion concentrations and counted total coliform, Escherichia coli and heterotrophic bacteria were measured. It was observed that the stored rainwater had a neutral average pH and ...
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Pilot plant trials: management of membrane concentrate
In surface water nanofiltration (NF) for drinking water production, 15 to 25% of the feed is rejected by the membranes. Two complementary approaches are investigated in order to manage concentrates. On one hand, an additional NF stage allows an increase in the yield of drinking water production from 85 to 94%. Thirty-days filtration cycles are achieved. Conductivity, natural organic matter (NOM) ...
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Control of disinfection byproduct (DBP) precursors by soil aquifer treatment (SAT): what length of hydraulic retention time (HRT) is necessary?
The study attempted to determine the hydraulic retention time (HRT) required for soil aquifer treatment (SAT) to reclaim water as potable water in an aspect of controlling disinfection byproduct (DBP) precursors. In order to evaluate the removal of DBP precursors, the uniform formation condition was used to estimate the formations of trihalomethanes (THMs) and haloacetic acids (HAAs). ...
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Biocorrosion in drinking water pipes
Copper is widely used in drinking water distribution systems due to its relatively low cost and favorable mechanical properties. However, copper corrosion may generate copper concentrations exceeding the thresholds prescribed by international drinking water standards. In-situ measurements performed in an actual system found that the copper mass released under flowing water conditions (pipe ...
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