scholarly journals Developing THMs’ Predictive Models in Two Water Supply Systems in Greece

Water ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1422 ◽  
Author(s):  
Stavroula Tsitsifli ◽  
Vasilis Kanakoudis
Keyword(s):  
Drinking Water ◽  
Water Supply ◽  
Predictive Models ◽  
Quality Parameters ◽  
Water Supply Systems ◽  
Water Safety ◽  
Water Treatment Process ◽  
Drinking Water Safety ◽  
Developmental Effects ◽  
Supply Systems

Disinfection is a very significant water treatment process for drinking water safety, as it inactivates pathogens from drinking water. However, disinfection-by-products (DBPs) are formed which are accused of contributing to cancer and reproductive/developmental effects. Research has provided many predictive models for the formation of DBPs based on various water quality parameters and following different methodologies. The present study aims at developing predictive models for the formation of DBPs in two drinking water supply systems in Greece. Data from the water supply systems are used. A statistical analysis took place to identify the predictive models for the formation of Total trihalomethanes (TTHMs). The results showed that some of the developed models are more reliable than others. However, further study is necessary in order to obtain more data on variables that are affecting trihalomethanes (THMs) formation. Such models can be used mainly locally.

scholarly journals Guidelines for Drinking Water Safety Planning for West Bengal

2020 ◽  
Keyword(s):  
Drinking Water ◽  
Water Supply ◽  
West Bengal ◽  
Bulk Water ◽  
World Health ◽  
Water Supply Systems ◽  
Safety Planning ◽  
Water Safety ◽  
Improvement Project ◽  
Supply Systems

Water safety planning is considered an international best practice for assessing and managing public health risks from drinking water supply systems. Under the West Bengal Drinking Water Sector Improvement Project and in close collaboration with the World Health Organization, the Asian Development Bank assisted in developing these water safety planning guidelines for the state of West Bengal. This document offers practical guidance for taking a water safety planning approach to bulk water supply systems, particularly in developing and implementing the stages of rural drinking water delivery service schemes in India and elsewhere.

Integrated risk assessment and screening analysis of drinking water safety of a conventional water supply system

2007 ◽  
Vol 56 (6) ◽  
pp. 47-56 ◽  
Author(s):  
F. Sun ◽  
J. Chen ◽  
Q. Tong ◽  
S. Zeng
Keyword(s):  
Risk Assessment ◽  
Drinking Water ◽  
Water Supply ◽  
Supply System ◽  
Water Supply System ◽  
Water Supply Systems ◽  
Assessment Procedure ◽  
Water Safety ◽  
Screening Analysis ◽  
Drinking Water Safety

Management of drinking water safety is changing towards an integrated risk assessment and risk management approach that includes all processes in a water supply system from catchment to consumers. However, given the large number of water supply systems in China and the cost of implementing such a risk assessment procedure, there is a necessity to first conduct a strategic screening analysis at a national level. An integrated methodology of risk assessment and screening analysis is thus proposed to evaluate drinking water safety of a conventional water supply system. The violation probability, indicating drinking water safety, is estimated at different locations of a water supply system in terms of permanganate index, ammonia nitrogen, turbidity, residual chlorine and trihalomethanes. Critical parameters with respect to drinking water safety are then identified, based on which an index system is developed to prioritize conventional water supply systems in implementing a detailed risk assessment procedure. The evaluation results are represented as graphic check matrices for the concerned hazards in drinking water, from which the vulnerability of a conventional water supply system is characterized.

scholarly journals Considerations on Drinking Water Management in the Moldavian Plateau and Plain Region

2018 ◽  
Vol 12 (1) ◽  
pp. 139-147
Author(s):  
Ștefania Chirica ◽  
Alexandru-Lucian Luca ◽  
Iustina Lateș
Keyword(s):  
Water Management ◽  
Drinking Water ◽  
Surface Water ◽  
Water Supply ◽  
Quality Parameters ◽  
Water Sources ◽  
Water Supply Systems ◽  
Water Losses ◽  
Supply Systems ◽  
Regional Water

Abstract The Moldavian Plateau and Plain have few drinking water sources (the case of Iaşi and Vaslui Counties). The main type of fresh water sources are groundwater and surface water. The Moldavian Plateau rural settlements are affected the most by the lack of viable, unpolluted water sources to ensure a volume able to cover the consumers’ demand. The pollution phenomenon induced by the non-availability of rural sewerage systems and also by the settlements’ areas foundation rocks have decreased the groundwater and surface water sources quality parameters. The adduction, transport and distribution networks of water supply systems are affected by the „water loss“ phenomenon. Water management in a transmission and distribution network must correlate the number of water sources, available volume, acceptable quality parameters and inherent water losses from networks with the consumers’ demands. The optimisation of water management in a given geographic space has led to the establishment of „regional water supply systems“. This process relies on the minimisation of water losses. The case study carried out in Iaşi County shows the importance of the regional water supply system development through optimal exploitation of Moldavian Plateau and Plain water sources.

scholarly journals Determination of priority chemicals of water from centralized supply systems for monitoring water safety

2021 ◽  
Vol 100 (5) ◽  
pp. 428-435
Author(s):  
Anna A. Khasanova ◽  
Kristina V. Chetverkina ◽  
Nina I. Markovich
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Health Risk ◽  
Water Supply ◽  
Human Health ◽  
Water Supply Systems ◽  
Water Safety ◽  
Risk Criteria ◽  
Supply Systems ◽  
Chemical Water

Introduction. The analysis of the sanitary and epidemiological situation in the Russian Federation indicates problems in the field of drinking water safety, caused, among other things, by chemical contamination. Due to the wide variety of pollutants, it is necessary to determine the procedure for identifying priority chemical pollutions from the water from centralized supply systems, using health risk criteria. Materials and methods. The analysis of relevant scientific literature and regulatory and methodological documents formed the basis for developing criteria for determining priority chemical pollutants contained in the water from centralized supply systems. A sampling of drinking water was carried out at the start point (water intake) and the endpoint of the distribution network (water tap). The selected water samples were examined using the chromatography-mass spectrometry method. Results. An algorithm for determining the priority chemicals in the water of centralized water supply systems according to the potential hazard and health risk criteria has been developed. Approaches to the identification of possible sources of chemical water pollutants from centralized supply systems were established. According to the results of testing, it was found that three of the 16 chemical water components are potentially dangerous: 1,1,2,2-tetrachloroethane, pentadecane, and lilial. The presence of pentadecane comes from a water source. Still, it should have eliminated water treatment. The presence of 1,1,2,2-tetrachloroethane and lilial is most likely due to water treatment and water transportation processes through the water supply systems. Conclusion. There are six criteria for determining priority chemical pollutions from the water from centralized supply systems based on hygiene standards compliance, an impact of the chemicals on the environment and the human health, the presence of harmful effects for humans and/or animals, implementation of possible mechanisms for the development of human health disorders and the acceptability of the risk level were proposed. There were identified three priority pollutants in the water from centralized supply systems that can be recommended for further monitoring.

scholarly journals Water Safety Plans: Risk assessment for consumers in Drinking Water Supply Systems

1969 ◽  
Vol 15 (2) ◽  
Author(s):  
Andrea Pérez-Vidal ◽  
Claudia Amézquita-Marroquín ◽  
Patricia Torres-Lozada
Keyword(s):  
Risk Assessment ◽  
Drinking Water ◽  
Water Supply ◽  
Drinking Water Supply ◽  
Water Supply Systems ◽  
Water Safety ◽  
Water Safety Plans ◽  
Supply Systems

El usuario final es el último componente de los Sistemas de Abastecimiento de Agua Potable (SAAP) y se caracteriza porsu vulnerabilidad frente a los peligros debido a su cercanía al punto de consumo. En este estudio se realizó la evaluacióndel riesgo en el usuario final del SAAP de la ciudad de Cali abastecido por el río Cauca, enmarcado en la filosofía de losPlanes de Seguridad del Agua (PSA), usando herramientas como la matriz de peligros/eventos peligrosos, el monitoreo decalidad de agua, la aplicación de encuestas a los usuarios y la construcción de matrices semicuantitativas para estimaciónde riesgos. Los resultados evidenciaron poca percepción del riesgo y desconocimiento de la responsabilidad del usuariofinal en la protección de la calidad del agua, lo que puede generar conductas inadecuadas comprometiendo la integridaddel sistema interno de distribución. Aunque la mayoría de variables analizadas cumplieron la reglamentación nacional,algunos puntos registraron bajos valores de cloro residual y elevado recuento de bacterias heterotróficas, lo que sugierepotenciales riesgos por presencia de biopelícula. La participación y compromiso de todos los actores involucradosson estrategias fundamentales para evitar conductas inadecuadas y reducir riesgos, además del fomento de campañaseducativas como lo indica la reglamentación nacional.

Methodological Approaches to Organization of Drinking Water Quality Monitoring Programs

2020 ◽  
pp. 4-8
Author(s):  
Yu.A. Novikova ◽  
I.O. Myasnikov ◽  
A.A. Kovshov ◽  
N.A. Tikhonova ◽  
N.S. Bashketova
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Water Supply ◽  
Cold Water ◽  
Water Quality Monitoring ◽  
Drinking Water Quality ◽  
Quality Monitoring ◽  
Water Supply Systems ◽  
Monitoring Programs ◽  
Supply Systems

Summary. Introduction: Drinking water is one of the most important environmental factors sustaining life and determining human health. The goal of the Russian Federal Clean Water Project is to improve drinking water quality through upgrading of water treatment and supply systems using advanced technologies, including those developed by the military-industrial complex. The most informative and reliable sources of information for assessing drinking water quality are the results of systematic laboratory testing obtained within the framework of socio-hygienic monitoring (SGM) and production control carried out by water supply organizations. The objective of our study was to formulate approaches to organizing quality monitoring programs for centralized cold water supply systems. Materials and methods: We reviewed programs and results of drinking water quality laboratory tests performed by Rospotrebnadzor bodies and institutions within the framework of SGM in 2017–2018. Results: We established that drinking water quality monitoring in the constituent entities of the Russian Federation differs significantly in the number of monitoring points (566 in the Krasnoyarsk Krai vs 10 in Sevastopol) and measured indicators, especially sanitary and chemical ones (53 inorganic and organic substances in the Kemerovo Region vs one indicator in the Amur Region). Discussion: For a more complete and objective assessment of drinking water quality in centralized cold water supply systems, monitoring points should be organized at all stages of water supply with account for the coverage of the maximum number of people supplied with water from a particular network. Thus, the number of points in the distribution network should depend, inter alia, on the size of population served. In urban settlements with up to 10,000 inhabitants, for example, at least 4 points should be organized while in the cities with more than 3,000,000 inhabitants at least 80 points are necessary. We developed minimum mandatory lists of indicators and approaches to selecting priority indices to be monitored at all stages of drinking water supply.

scholarly journals Microbial diversity in full-scale water supply systems through sequencing technology: a review

RSC Advances ◽  
2021 ◽  
Vol 11 (41) ◽  
pp. 25484-25496
Author(s):  
Wei Zhou ◽  
Weiying Li ◽  
Jiping Chen ◽  
Yu Zhou ◽  
Zhongqing Wei ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Supply ◽  
Microbial Diversity ◽  
Full Scale ◽  
Water Supply Systems ◽  
Sequencing Technology ◽  
Supply Systems

Drinking water microbial diversity influence in full-scale water supply systems.

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