water quality Articles | Environmental XPRT

Drinking Water Quality

The quality of drinking-water is a powerful environmental determinant of health. Drinking-water quality management has been a key pillar of primary prevention for over one-and-a-half centuries and it continues to be the foundation for the prevention and control of waterborne diseases. Water is essential for life, but it can and does transmit disease in countries in all continents – from the ...

Mar. 8, 2012

By IWA Publishing

Water Quality and Purity

Even an advanced country like the United States is facing significant water problems relating to availability, purity, and quality. Over 700 chemicals have been detected in U.S. drinking water as it comes out of the tap. EPA has classified 129 of them as being particularly dangerous. Drinking bottled water does not assure the absence of ...

Apr. 6, 2012

By IWA Publishing

Sources of data for water quality criteria

Jan. 16, 2013

By John Wiley & Sons, Ltd.

Water Quality - UN Water Policy Brief

This policy brief is a collaborative output of UN-Water members and partners directed at practitioners, policymakers and decision-makers in water resource management and other relevant sectors. The policy brief outlines the challenges and trends, drivers and impacts related to water quality. It also presents four strategies that form the basis of policy solutions. It concludes by detailing a ...

Jan. 25, 2012

By IWA Publishing

Water Quality Modelling

Water quality modelling involves the prediction of water pollution using mathematical simulation techniques. A typical water quality model consists of a collection of formulations representing physical mechanisms that determine position and momentum of pollutants in a water body. Models are available for individual components of the hydrological system such as surface runoff; there also exist ...

Apr. 6, 2012

By IWA Publishing

Ecological Water Quality - Water Treatment and Reuse

This book attempts to cover various issues of water quality in the fields of Hydroecology and Hydrobiology and present various Water Treatment Technologies. Sustainable choices of water use that prevent water quality problems aiming at the protection of available water resources and the enhancement of the aquatic ecosystems should be our main target. Continue reading the full ...

Jul. 25, 2012

By IWA Publishing

Recycled Water Quality

Matching recycled water quality to beneficial uses requires an understanding of health and environmental requirements. Measures to achieve appropriate recycled water quality are determined firstly by treatment. The degree of treatment depends in part on the source and the hydraulic and biochemical characters of the wastewater. Overall recycled water outcomes may also be controlled ...

Apr. 2, 2012

By IWA Publishing

Water quality measurement extreme

Background The characteristics of the Rio Tinto in the south-west of Spain, near Sevilla, are his ruby colour and the extremely sour pH-value between 0 and 2 pH-units. The river carries a mixture between poisonous heavy metals like copper, nickel, arsenic, iron and cadmium, dissolved in high-percent sulphuric acid. It’s not proved where these unusual conditions come from. As per current ...

May 6, 2010

By OTT HydroMet

Data capture ensures stable water quality

Blue Unit has over the last year and a half participated in a project that focuses on developing danish technologies. The case was given the title “Data capture ensures stable water quality”. You can read more in this case ...

Jun. 18, 2019

By Blue Unit A/S

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 ...

Jun. 20, 2011

By IWA Publishing

Editorial Weather and climate extremes: impacts on water quality

May 15, 2014

By IWA Publishing

Water Quality Models

' In order to determine the impacts of a particular discharge on ambient water quality, it is usually necessary to model the diffusion and dispersion of the discharge in the relevant water body. The approach applies both to new discharges and to upgrading of existing sources. This note provides guidance on models that may be applicable in the context of typical Bank projects.' Introduction ...

Jan. 1, 1997

By The World Bank

Water quality in healthcare

Rivers are important freshwater resources for many countries and human beings around the world. Social well being, economics and political development have been largely related to the availability and distribution of these freshwater resources. In many parts of the world the adverse health impacts of water supply from rivers, dam construction, irrigation development and flood mitigation have led ...

Apr. 22, 2008

By Inderscience Publishers

Bushfire and water quality

Bushfires pose a great risk to drinking water quality in water tanks, water catchment facilities and water supply infrastructure. Generation of large amounts of smoke, ash and debris leads to contamination of water in water tanks and on roof catchment infrastructure like gutters. In extreme cases, it is possible that fire retardants or foams used to control the fire may also be deposited on roof ...

Jan. 14, 2020

By NW Solutions

Do Septic Systems Affect Water Quality?

Around 25% of homes in the United States are not connected to the community sewage systems and have a separate septic system installed. The Environmental Protection Agency has found that at least 48.5% of homes in the State of North Carolina also have a septic system installed. For more information check out this blog: http://www.lakenormanseptic.com/do-septic-systems-affect-water-quality/ ...

Jan. 30, 2014

By Lake Norman Sewer & Septic

Water Quality Monitoring and Assessment

The book attempts to covers the main fields of water quality issues presenting case studies in various countries concerning the physicochemical characteristics of surface and groundwaters and possible pollution sources as well as methods and tools for the evaluation of water quality status. This book is divided into two sections: Statistical Analysis of Water Quality Data;Water Quality Monitoring ...

Jul. 25, 2012

By IWA Publishing

Water quality characteristics of different industrial wastewater by Delphi water quality index method

Water quality index (WQI) is a single value numerical expression, which can evaluate the quality of given water body at particular position and time. Five different industrial wastewaters WQI are formulated by Delphi process (before and after treatment) and the results obtained for each samples are reported. It has been observed that the individual parameters vary quite widely whereas when it is ...

Dec. 2, 2013

By Inderscience Publishers

Meeting water quality specifications for 300 mm processing

Abstract This paper reviews the historical ultrapure water specifications and compares them to the specifications for state of the art 300 mm manufacturing. As the design rule has evolved to 0.13 μm, the ultrapure water specifications have made similar evolutions. This paper discusses these evolutions and focuses on the state of the art technologies that are available to meet these ...

Mar. 28, 2001

By 3M Membrane Filtration (formerly Membrana)

Predicting ‘very poor’ beach water quality gradings using classification tree

A beach water quality prediction system has been developed in Hong Kong using multiple linear regression (MLR) models. However, linear models are found to be weak at capturing the infrequent ‘very poor’ water quality occasions when Escherichia coli (E. coli) concentration exceeds 610 counts/100 mL. This study uses a classification tree to increase the accuracy in predicting the ‘very poor’ ...

Oct. 8, 2015

By IWA Publishing

Status and trends of water quality in the Tafna catchment: a comparative study using water quality indices

Water quality indices (WQIs) are necessary for resolving lengthy, multi-parameter, water analysis reports into single digit scores; different WQIs have been developed worldwide which are greatly differing in terms of mathematical structures, the numbers and types of variables included, etc. The aim of this paper is to evaluate trends of water quality in Tafna basin with a comparison of 10 ...

Mar. 30, 2016

By IWA Publishing