Quality of Raw Water for Drinking-Water Supply on the Ogasawara Islands -Focusing on Formation Potentials of Disinfection By-products-

Drinking water supply is essential for public health, quality of life, sustainable development of economic activity, and environmental protection. In this context, it is important to ensure continuous improvement of all stages of processes to guarantee water quality and safety [1]. The main objectives of the study are: -development of an integrated method and probable risk analysis for a drinking water supply system; -risk assessment of contamination of raw water with nitrate [2].

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Methodology for estimating the state of non-centralized sources of drinking water supply in an emergency socio-economic situation

Vodosnabzhenie i sanitarnaia tehnika ◽

10.35776/vst.2021.10.06 ◽

2021 ◽

pp. 56-64

Author(s):

С.В. Капранов

Keyword(s):

Drinking Water ◽

Water Supply ◽

Tap Water ◽

Water Source ◽

Water Sources ◽

The State ◽

Drinking Water Supply ◽

Laboratory Studies ◽

Grading Scale

Целью работы явилось обоснование необходимости организации и проведения на конкурсной основе благоустройства нецентрализованных водоисточников с использованием разработанной методики комплексной гигиенической и экологической оценки состояния нецентрализованных источников питьевого водоснабжения в условиях чрезвычайной ситуации. В работе использованы результаты многолетнего санитарно-гигиенического обследования и лабораторных исследований воды коллективных источников нецентрализованного питьевого водоснабжения. Определены следующие основные показатели для комплексной гигиенической и экологической оценки состояния нецентрализованных водоисточников: степень соответствия водоисточника установленным санитарно-гигиеническим и санитарно-техническим нормам и требованиям; соблюдение зон санитарной охраны; санитарно-просветительное, эстетическое и художественное оформление водоисточников; уровень благоустройства территории, окружающей водоисточники; качество воды водоисточников по результатам лабораторных исследований за определенный период. По каждому из пяти показателей предусмотрена оценка по 12-балльной шкале с последующим суммированием баллов с целью получения итогового результата комплексной оценки. Учитывая успешное проведение конкурса по благоустройству нецентрализованных источников водоснабжения с использованием разработанной методики комплексной гигиенической и экологической оценки состояния нецентрализованных источников питьевого водоснабжения в районе с резким дефицитом питьевой водопроводной воды, рекомендовано опыт проведения данного мероприятия распространить на другие административные территории, находящиеся в подобной ситуации. The work objective was substantiating the need to arrange and conduct, on a competitive basis, the improvement of non-centralized water sources using the developed methodology for a comprehensive hygienic and environmental estimation of the state of non-centralized sources of drinking water supply in an emergency. The work uses the results of many years of sanitary and hygienic survey and laboratory studies of water from communal sources of non-centralized drinking water supply. The following main indicators have been determined for a comprehensive hygienic and environmental estimation of the state of non-centralized water sources: the degree of compliance of the water source with the established sanitary, hygienic and sanitary technical regulations and requirements; compliance with the sanitary protection zones; the sanitary and educational, aesthetic and artistic design of water sources; the level of improvement of the territory surrounding the water sources; the water quality of the water sources according to the results of laboratory tests for a certain period. Each of the five indicators was estimated according to the 12-point grading scale with the subsequent summation of points in order to provide for the final result of a comprehensive estimation. Considering the successful holding of a competitive tender for the improvement of non-centralized water supply sources using the developed methodology for a comprehensive hygienic and environmental estimation of the state of non-centralized drinking water supply sources in an area with severe shortages of drinking tap water, extending the experience of these measures to other administrative territories in a similar situation is recommended.

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Sanitary and epidemiological situation in the Lower Volga Region: problems and solutions

Vodosnabzhenie i sanitarnaia tehnika ◽

10.35776/vst.2021.06.03 ◽

2021 ◽

pp. 28-34

Author(s):

Л.В. Боронина

Keyword(s):

Drinking Water ◽

Water Treatment ◽

Water Supply ◽

Distribution Networks ◽

Drinking Water Supply ◽

Volga Region ◽

Volga River ◽

Lower Volga Region ◽

Lower Volga

Волга почти на всем протяжении от Твери до Астрахани является истощенным водоемом по качественному составу. По Нижневолжскому бассейну ресурс экологически чистой воды составляет не более 3% общих ресурсов поверхностных вод Астраханской области. В связи с этим в Астраханской области проблемы качества питьевой воды обусловлены загрязнением природной воды, неудовлетворительной очисткой ее на водопроводных станциях, вторичным загрязнением в разводящих сетях. Проведен анализ экологического состояния Нижней Волги, а также оценка его влияния на качество питьевого водоснабжения. Применяемые в Астраханской области технологии очистки воды для водоснабжения запроектированы и построены в 1960–70-е годы и не рассчитаны на грязевую нагрузку по качеству и количеству, значительно отличающуюся от современной ситуации. Проведен анализ работы водозаборных и водопроводных очистных сооружений, который показал, что они находятся в крайне неудовлетворительном техническом состоянии и морально устарели. Предложены пути решения вопросов по улучшению качества питьевого водоснабжения с учетом сложившейся кризисной экологической обстановки на Нижней Волге и мирового опыта. Almost along the entire length from Tver to Astrakhan, the Volga River has been a depleted water reservoir in terms of its qualitative composition. In the Lower Volga basin the resource of ecologically clean water is less than 3% of the total surface water resources of the Astrakhan Region. In this regard, drinking water quality problems in the Astrakhan Region have been caused by natural water pollution, poor water treatment at the waterworks, secondary pollution in the distribution networks. The ecological state of the Lower Volga has been analyzed, and its impact on the quality of drinking water supply has been estimated. The technologies of water purification used in the Astrakhan Region for water supply were designed and implemented in the 1960s–70s; they were not designed for the pollution load in terms of the quality and quantity significantly different from the current situation. An analysis of the operation of water intake and water treatment facilities was carried out that showed their extremely unsatisfactory technical condition and obsolescence. The ways of solving the problems of improving the quality of drinking water supply with account of the current critical ecological situation in the Lower Volga Region and world experience, are proposed.

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Investigation of the effects of hydrogenotrophic denitrification and anammox on the improvement of the quality of the drinking water supply system

Journal of Environmental Science and Health Part A ◽

10.1080/10934529.2013.797249 ◽

2013 ◽

Vol 48 (12) ◽

pp. 1533-1542 ◽

Cited By ~ 1

Author(s):

W. Khanitchaidecha ◽

P. Koshy ◽

T. Kamei ◽

M. Shakya ◽

F. Kazama

Keyword(s):

Drinking Water ◽

Water Supply ◽

Supply System ◽

Water Supply System ◽

Drinking Water Supply ◽

Drinking Water Supply System

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The quality of drinking water supply in Samara

Samara Journal of Science ◽

10.17816/snv202093119 ◽

2020 ◽

Vol 9 (3) ◽

pp. 113-121

Author(s):

Olga V. Sazonova ◽

Tatyana K. Ryazanova ◽

Daria S. Tupikova ◽

Tatyana V. Sudakova ◽

Lyudmila N. Vistyak ◽

...

Keyword(s):

Drinking Water ◽

Water Supply ◽

Urban Areas ◽

Temporal Dynamics ◽

Health And Safety ◽

Underground Water ◽

Drinking Water Supply ◽

Chemical Indicators ◽

Hygienic Standard

The purpose of the study was to monitor the quality of drinking water supply in Samara. The quality of drinking water was evaluated in 7 districts of Samara on the basis of 20 sanitary-chemical indicators in accordance with health and safety norms and regulations (SanPiN 2.1.4.107401 20102013 and 20182019). A changed color of drinking water was mainly observed in the areas with water supply from the Saratov reservoir (53,5 8,5% of samples). In the areas with underground water sources the dry residue and hardness of drinking water exceeded hygiene requirements by 100% and 87,5% of samples respectively. 64% of samples in 20102013 and 17,4% of samples in 20182019 were non-standard in terms of permanganate oxidation. Several samples didnt meet the hygienic standard for iron content. Adverse changes in the temporal dynamics of the proportion of samples that didnt meet the hygienic standard for the content of oil products were noted. The quality of some samples of drinking water in Samara did not meet sanitary requirements for some indicators. No significant differences were found between the average long-term values of sanitary and hygienic indicators for urban areas and the obtained data for drinking water in the new housing estate, which suggests that the condition of the water supply pipes doesnt influence the composition of the drinking water in the yard or at home.

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IMPROVING CYANOBACTERIA AND CYANOTOXIN MONITORING IN SURFACE WATERS FOR DRINKING WATER SUPPLY

Journal of Water Security ◽

10.15544/jws.2017.005 ◽

2017 ◽

Vol 3 (1) ◽

Cited By ~ 5

Author(s):

Jing Li ◽

Linda Parkefelt ◽

Kenneth M Persson ◽

Heidi Pekar

Keyword(s):

Water Management ◽

Drinking Water ◽

Water Treatment ◽

Water Supply ◽

Surface Waters ◽

Drinking Water Supply ◽

Cyanobacterial Blooms ◽

Management Tool ◽

Raw Water ◽

Water Treatment Plants

Cyanobacteria in fresh water can cause serious threats to drinking water supplies. Managing cyanobacterial blooms particularly at small drinking water treatment plants is challenging. Because large amount of cyanobacteria may cause clogging in the treatment process and various cyanotoxins are hard to remove, while they may cause severe health problems. There is lack of instructions of what cyanobacteria/toxin amount should trigger what kind of actions for drink-ing water management except for Microcystins. This demands a Cyanobacteria Management Tool (CMT) to help regula-tors/operators to improve cyanobacteria/cyanotoxin monitoring in surface waters for drinking water supply. This project proposes a CMT tool, including selecting proper indicators for quick cyanobacteria monitoring and verifying quick analysis methods for cyanobacteria and cyanotoxin. This tool is suggested for raw water management regarding cyano-bacteria monitoring in lakes, especially in boreal forest climate. In addition, it applies to regions that apply international WHO standards for water management. In Swedish context, drinking water producers which use raw water from lakes that experience cyanobacterial blooms, need to create a monitoring routine for cyanobacteria/cyanotoxin and to monitor beyond such as Anatoxins, Cylindrospermopsins and Saxitoxins. Using the proposed CMT tool will increase water safety at surface water treatment plants substantially by introducing three alerting points for actions. CMT design for each local condition should integrate adaptive monitoring program.

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