scholarly journals A study of drinking water quality before and after its purification in Saint-Petersburg

2019 ◽  
pp. 13-15
Author(s):  
Tatiana Ivanovna Zhilochkina ◽  
Andrei Igorevich Seliverstov
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Water Supply ◽  
Water Samples ◽  
Water Distribution ◽  
Saint Petersburg ◽  
Before And After ◽  
The City ◽  
Comprehensive Study

This article is devoted to a comprehensive study of drinking water before and after its purification. Water samples taken at 5 water supply and 5 water distribution stations of the city were used in the study. The author comes to the conclusion that the use of the monitoring system allows you to respond quickly to any changes in the quality of the drinking water, and quickly make decisions that affect its purification.

scholarly journals About the question of the assessment of the drinking water quality in centralized water systems in the current conditions

2020 ◽  
Vol 99 (6) ◽  
pp. 563-568
Author(s):  
Yuliya A. Novikova ◽  
K. B. Friedman ◽  
V. N. Fedorov ◽  
A. A. Kovshov ◽  
N. A. Tikhonova ◽  
...  
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Water Supply ◽  
Supply System ◽  
Drinking Water Quality ◽  
Water Supply Systems ◽  
High Quality ◽  
Supply Systems ◽  
The City

Introduction. Regulation of drinking water quality is a very important area of health care and improving the quality of life of the population of the Russian Federation.The aim of this work is the development a model for the assessment of the drinking water quality and calculating the share of the population, including urban, provided with high-quality drinking water from centralized water supply systems, taking into account new methodological approaches to the evaluation of the quality of drinking water using the example of water supply to settlements in the Leningrad Region. Material and methods. The data on the organization of centralized cold water supply systems and monitoring systems for drinking water quality and the results of laboratory studies of drinking water quality in the cities of Volkhov, Svetogorsk, Slantsy, Tosno were studied. Statistical processing of the results was performed, the categories of quality of drinking water supplied to the population were determined, the number of the population provided with high-quality drinking water from the water supply system was calculated in accordance with Guidelines 2.1.4.0143-19.Results. In 2018, 100% of the population was provided with quality drinking water only in the city of Slantsy. In the city of Tosno, this index reached of 83.5%. In the cities of Volkhov and Svetogorsk, drinking water was rated as low-quality. But it is worth noting that in the cities of Volkhov and Slantsy laboratory tests were carried out at 2 points, in the city of Svetogorsk - only at the 1 point, which, given the number of residents, is not enough. For an objective assessment of the state of drinking water and the development of measures aimed at improving its quality, it is necessary to increase the number of monitoring points, as well as to include the results of control and supervision measures and production laboratory control conducted by water supply organizations in the volume of laboratory information.Conclusion. The proposed model allows us to assess the drinking water quality in centralized water supply systems and the proportion of the population, including urban, provided with quality drinking water at the level of the water supply system, settlement, municipal district (urban district), subject of the Russian Federation

scholarly journals Appraisal of Public Pipe-borne Water Quality in Jimeta/Yola Adamawa State (Nigeria): From the Treatment-plants to End-user Points

2020 ◽  
pp. 53-65
Author(s):  
I. B. Bwatanglang ◽  
E. Yonnana ◽  
Lynna D. Ibrahim ◽  
Abdulrahman I. Kubo ◽  
B. K. Elijah ◽  
...  
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Water Samples ◽  
Water Distribution ◽  
Treatment Plant ◽  
Poor Quality ◽  
End User ◽  
Point Of Use ◽  
Piped Water

This research aimed at assessing the drinking water quality of piped water distribution in Jimeta-Yola Adamawa State, Nigeria. The strategy was based on establishing the possibilities of contaminants underlying the distribution channels compromising the quality from the treatment source to the consumer point of use. Selected heavy metals and physiological parameters were determined toward establishing the water quality indices (WQI). Though, most of the parameter determined fell below or within the permissible limits (PL) set by WHO for drinking water, the results indicated significant (p<0.05) differences in the concentrations determined in the treatment plants (Yola treatment plant (YTP) and Jimeta treatment plant (JMTP)) with those at the consumer endpoints (YTPC and JMTPC). The results showed the WQI at the treatment plants being compromised due to the induction of pollutants across the distribution pipes. The water samples at the treatment point (JMTP) were excellent, having WQI <25 and good quality at YTP (25< WQI<50). However, the water quality on leaving the treatment source was observed to slightly change to poor quality at JMTPC (WQI= 57.00), and further observed to be in moderate-good quality at YTPC (WQI=49.27). Further analysis showed an increase in bacterial counts in the water samples at the consumer points.  Escherichia coli concentrations of 565 and 718 cfu /100 mL were detected in samples from YTPC and JMTPC, despite the fact the water was observed to be free from bacteria at the treatment plants.

scholarly journals Influence of the quality of drinking water supply sources on the formation of the ecologically-dependent pathology of the population of the Republic of Dagestan

2021 ◽  
Vol 15 (4) ◽  
pp. 168-176
Author(s):  
M. G. Daudova ◽  
R. B. Bagomedova ◽  
K. K. Bekshokov ◽  
M. M. Medzhidova ◽  
S. M. Nakhibashev ◽  
...  
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Water Supply ◽  
Negative Impact ◽  
Kidney Diseases ◽  
Ecological Condition ◽  
Drinking Water Quality ◽  
Chemical Contamination ◽  
The Republic

Aim. Study of the influence of drinking water quality on the ecologically-dependent morbidity of the population of the Republic of Dagestan.Material and Methods. Methods of current and retrospective analysis of regional health indicators and methods of mathematical-statistical and medical-geographical analysis were used. Statistical processing of the results was carried out using the STATISTICA and Excel software packages. When carrying out laboratory studies on the quality of drinking water, we used a Lumex atomic absorption spectrometer "MGA-915MD".Results. Numerous hygiene studies indicate the direct impact of unsatisfactory drinking water quality on the health of a population. The relationship between sanitary and chemical indicators and the incidence rate for a number of nosological forms has been proven. It is generally accepted that human health is influenced by lifestyle factors (working, living and relaxation conditions), heredity and the ecological condition of the area of residence, including the quality of drinking water. Although it is not possible to differentiate the share of the negative effect caused by the consumption of poor quality drinking water but the incidence of certain nosological forms (cancer of the esophagus, gastrointestinal tract and kidney diseases) in the those regions of the Republic of Dagestan under consideration correlates with the characteristics of drinking water.Conclusion. The problem of pollution of water supply sources for the population in the dynamics of the long-term remains a priority concern. The quality and safety of drinking water are decreasing, which cannot but have a negative impact on public health. Correlation linkages between indicators of drinking water quality and oncological morbidity of the population were also established in indicators below the maximum permissible concentrations, which corresponds to a typical logistic model of causal relationships and serves as evidence of the high dependence of health disorders on chemical contamination of water supply sources. 

scholarly journals Quality changes of drinking water in the water supply network (case study from Lithuania)

2009 ◽  
Vol 41 (2) ◽  
pp. 109-118
Author(s):  
Marina Valentukeviciene ◽  
Aukse Amosenkiene ◽  
Regimantas Dauknys
Keyword(s):  
Drinking Water ◽  
Water Supply ◽  
Water Samples ◽  
Water Distribution ◽  
Quality Changes ◽  
Supply Network ◽  
Water Supply Network ◽  
Well Field ◽  
Drinking Water Distribution

Quality changes of drinking water in the water supply network (case study from Lithuania) The purpose of this research was to examine water quality changes by distributing in to the water supply network. Water samples were collected from Varena town (Lithuania) drinking water distribution system fed by groundwater from well field. Parameters related to undesirable increasing of nitrites and nitrates concentrations have been measured considering these samples: pH, conductivity, concentration of total iron, manganese, ammonium, nitrates and nitrites. Results showed that groundwater from well field were extremely susceptible to favor bacterial growth in the pipelines. The occurrence of nitrites and nitrates in drinking water samples correlated positively with the lengths of old iron pipelines and negatively with the content of newly laid pipelines. The obtained results also showed that the potential nitrates increasing induced by the distribution of treated water could be reduced if: nitrates levels were below detection limits at the outlet of the water treatment plant; biological ammonium removal treatment implementation should reduce the levels of the nitrates and nitrites of the treated supplied water. Although the nitrates concentration increase in drinking water distribution systems, the issues with nitrites accumulation are rare in Lithuania. However, such processes still need to be proved in more extensive investigation, but these research results could be applied as a basic scenario.

scholarly journals Impact of Changes in Land Use and Land Cover in the Contribution Basin of Doutor João Penido Water Supply Reservoir of Juiz de Fora, MG, Brazil

2021 ◽  
Vol 11 (1) ◽  
pp. 108
Author(s):  
Juliana Nazareth de Lana ◽  
Márcio de Oliveira ◽  
Vanessa Romario de Paula ◽  
Cézar Henrique Barra Rocha
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Land Cover ◽  
Water Supply ◽  
Quality Parameters ◽  
E Coli ◽  
The City ◽  
Water Supply Reservoirs ◽  
Limnological Parameters

Changes in the land use and land cover in areas adjacent to water reservoirs directly affect the quality of this water. This research presents a study on the water quality in the basin of one of the most important public water supply reservoirs in the city of Juiz de Fora, Minas Gerais. The main objective of this study was to analyze the behavior of limnological parameters and the correlation with land use and land cover in the contribution basin of the Doutor Jo&atilde;o Penido reservoir (CBJPR). The methodology was based on the analysis of water quality parameters, related to water samples collected from 2012 to 2015. Six sampling points were chosen from different locations: spring, medium course, main tributaries of the reservoir and the reservoir catchment. The parameters analyzed were turbidity, total solids (TS), oxygen consumed (OC), dissolved oxygen (DO), electrical conductivity, total nitrogen (TN), total phosphorus (TP), E. Coli, temperature, pH and total dissolved solids (TDS). The Kendall&rsquo;s tau test was used to analyze the correlations between the parameters of water quality, land use and land cover in the CBJPR. In general, measured parameters showed better results in spring and in reservoir catchment, showing a worse quality of the water along the tributaries and the dilution power of the reservoir. The correlations pointed to the need for protection and preservation of forests in strategic locations to ensure good water quality.

PROBLEMS OF WATER SUPPLY IN THE TERRITORY OF THE OREL REGION AND WAYS TO SOLVE IT

2021 ◽  
Author(s):  
Павел Алексеевич Лапин ◽  
Сергей Александрович Копылов ◽  
Дмитрий Васильевич Елисеев
Keyword(s):  
Water Quality ◽  
Water Supply ◽  
The State ◽  
Quality Of Water ◽  
The City

В статье анализируется состояние водного фонда в области и обеспеченность жителей региона водой. Рассматриваются основные проблемы неудовлетворительного качества воды в районах области и в г. Орле. Предлагается комплекс мероприятий с целью повышение качества водоснабжения на территории Орловской области путём строительства пяти объектов водоснабжения. The article analyzes the state of the water fund in the region and the provision of water to the residents of the region. The main problems of unsatisfactory water quality in the districts of the region and in the city of Orel are considered. A set of measures is proposed to improve the quality of water supply in the territory of the Orel region through the construction of five water supply facilities.

scholarly journals Building a Methodology for Assessing Service Quality under Intermittent Domestic Water Supply

Water ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1164 ◽  
Author(s):  
Assia Mokssit ◽  
Bernard de Gouvello ◽  
Aurélie Chazerain ◽  
François Figuères ◽  
Bruno Tassin
Keyword(s):  
Drinking Water ◽  
Water Supply ◽  
Water Distribution ◽  
Water System ◽  
Evaluation Framework ◽  
Domestic Water ◽  
Water Service ◽  
Quality Of Water ◽  
History Of

This document proposes a methodology for assessing the quality of water distribution service in the context of intermittent supply, based on a comparison of joint results from literature reviews and feedback from drinking water operators who had managed these networks, with standards for defining the quality of drinking water service. The paper begins by reviewing and proposing an analysis of the definition and characterization of intermittent water supply (IWS), highlighting some important findings. The diversity of approaches used to address the issue and the difficulty of defining a precise and detailed history of water supply in the affected systems broadens the spectrum of intermittency characterization and the problems it raises. The underlined results are then used to structure an evaluation framework for the water service and to develop improvement paths defined in the intermittent networks. The resulting framework highlights the means available to water stakeholders to assess their operational and management performance in achieving the improvement objectives defined by the environmental and socio-economic contexts in which the network operates. Practical examples of intermittent system management are collected from water system operators and presented for illustration purposes (Jeddah, Algiers, Port-au-Prince, Amman, Cartagena, Barranquilla, Mexico, Cancun, Saltillo, Mumbai, Delhi, Coimbatore …).

Reduction in Exposure to Lead from Drinking Water and its Effect on Blood Lead Concentrations

1984 ◽  
Vol 3 (5) ◽  
pp. 383-392 ◽  
Author(s):  
J.C. Sherlock ◽  
D. Ashby ◽  
H.T. Delves ◽  
G.I. Forbes ◽  
M.R. Moore ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Water Supply ◽  
Water Samples ◽  
Lead Concentration ◽  
Blood Lead ◽  
Substantial Contribution ◽  
Blood Samples ◽  
Before And After ◽  
Lead Pipes

1 The water supply in Ayr (Scotland, UK) was plumbosolvent and many dwellings in Ayr contained lead pipes. In 1981 treatment of the water supply to reduce its plumbosolvency was initiated. Measurements of water and blood lead concentrations were made before and subsequent to the treatment. Most of the measurements made before and after water treatment began were made on water samples from the same dwellings and blood samples from the same women. 2 Water treatment produced a sharp fall in water lead concentrations and a decrease in the median blood lead concentration from 21 to 13 μg/100 ml. 3 Two women had higher than expected blood lead concentrations, both these women had been removing old paint. 4 Women who had lead pipes removed from their dwellings all showed substantial decreases in their blood lead concentrations. 5 The curvilinearity of the relation between blood lead and water lead concentrations is confirmed. Even relatively low (<40 μg/l) water lead concentrations may make a substantial contribution to blood lead concentrations.

scholarly journals Drinking Water Quality in Urban Areas of Pakistan: A Case Study of Gujranwala City

2016 ◽  
Vol 59 (3) ◽  
pp. 157-166
Author(s):  
Sajjad Haydar ◽  
Obaidullah Nadeem ◽  
Ghulam Hussain ◽  
Haroon Rashid ◽  
Rashid Majeed
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Urban Areas ◽  
Heavy Metal Contamination ◽  
Water Quality Monitoring ◽  
National Standards ◽  
Drinking Water Quality ◽  
Tube Wells ◽  
Before And After

A study was conducted to evaluate the drinking water quality of Gujranwala city. Samples were collected from 16 locations including: 4 tube wells, 4 overhead reservoirs (OHR) and 8 house connections. Twelve physicochemical and two bacteriological parameters were tested, before and after monsoon and compared with National Standards for Drinking Water Quality (NSDWQ). The results demonstrated that most of the physicochemical parameters, except lead, nickle and chromium were within NSDWQ before and after monsoon. Bacteriological and heavy metal contamination was found before and after the monsoon. Possible reasons of contamination are: no disinfection, old and leaking water pipes, poor drainage duringmonsoon and possible cross connections between water and sewerage lines. It is recommended to practice disinfection, laying of water and sewerage pipes on opposite sides of streets and periodic water quality monitoring.

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