In the current study, the qualitative status of potable well water was assessed using the groundwater quality index during a course of 4 years (2014-2017). This study was carried out with an aim to monitor the drinking water resources from 12 potable wells on the multivariate analysis basis and for determination of groundwater quality index, the following 13 physicochemical parameters including...

Raghavachari and Venkataraman (1940) King Institute, Guindy, reported the occurrence of fluorides in waters from the Visakhapatnam District. Further particulars sought from the King Institute indicated: "In connection with the investigation of rural water supplies, a large number of samples from bore wells and dug wells in the Visakhapatnam District were analysed; 11 sources yielded water conta...

The identification of nitrate-nitrogen (NO3–N) origin is important in the control of surface and ground water quality. These are the main sources of available drinking water. Stable isotopes (15N and 18O) for NO3–N and along with a 1-D reactive transport model were used to study the origin and processes that lead to nitrogen transformation and loss in a major stream that flows into a reservoir ...

Salinisation is the accumulation of water-soluble salts in the soil solum or regolith to a level that impacts on agricultural production, environmental health and economic welfare. Salt-affected soils occur in more than a hundred countries of the world with a variety of extents, nature and properties. No climatic zone in the world is free from salinisation, although the general perception is fo...

There is a resurgence of interest in controlling the excessive fertilization (eutrophication) of surface waters in order to protect domestic water supplies and other beneficial uses of waters from impairment (pollution) by excessive growths of algae or other aquatic plants whose growth is stimulated by nitrogen and phosphorus. An area of particular concern is the nutrients added to waterbodies ...

BACKGROUND In 2006, three farmers died at the bottom of an agricultural shallow well where the atmosphere contained only 6% oxygen. This study aimed to document the variability of levels of oxygen and selected hazardous gases in the atmosphere of wells, and to identify ambient conditions associated with the low-oxygen situation. METHODS A cross-sectional survey, conducted in June 2007 and Jul...

INTRODUCTION Overwhelming evidence implicates Helicobacter pylori (H. pylori) as an etiologic agent of gastrointestinal diseases including gastric cancer. The mode of transmission of this pathogen remains poorly understood. OBJECTIVE This investigation is to establish the presence of H. pylori in the waters of the Nairobi river basin and the predictive value the presence of fecal indicator ba...

Testing of 1701 water wells in northeastern Pennsylvania shows that methane is ubiquitous in groundwater, with higher concentrations observed in valleys vs. upland areas and in association with calcium-sodium-bicarbonate, sodium-bicarbonate, and sodium-chloride rich waters--indicating that, on a regional scale, methane concentrations are best correlated to topographic and hydrogeologic features...

nitrate has been the most common chemical contaminant in water resource. this ion is introduced into the water via different ways, but more items of nitrate pollution was connected with farming-based drainage and sewage effluent. in this descriptive-analytical study, groundwater nitrate and nitrite concentrations of 8 wells on dehloran, ilam, iran, were analyzed in 2015 to determine the causes ...