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Overview of microbial risks in water distribution networks and their health consequences: Quantification, modelling, trends, and future implications
Chalmers University of Technology, Sweden.
RISE - Research Institutes of Sweden, Built Environment, Energy and Circular Economy. Chalmers University of Technology, Sweden.ORCID iD: 0000-0003-1075-9953
Chalmers University of Technology, Sweden.
2019 (English)In: Canadian journal of civil engineering (Print), ISSN 0315-1468, E-ISSN 1208-6029, Vol. 46, no 3, p. 149-159Article in journal (Refereed) Published
Abstract [en]

The water distribution network (WDN) is usually the final physical barrier preventing contamination of the drinking water before it reaches consumers. Because the WDN is at the end of the supply chain, and often with limited online water quality monitoring, the probability of an incident to be detected and remediated in time is low. Microbial risks that can affect the distribution network are: intrusion, cross-connections and backflows, inadequate management of reservoirs, improper main pipe repair and (or) maintenance work, and biofilms. Epidemiological investigations have proven that these risks have been sources of waterborne outbreaks. Increasingly since the 1990s, studies have also indicated that the contribution of these risks to the endemic level of disease is not negligible. To address the increasing health risks associated to WDNs, researchers have developed tools for risk quantification and risk management. This review aims to present the recent advancements in the field involving epidemiological investigations, use of quantitative microbial risk assessment (QMRA) for modelling, risk mitigation, and decision-support. Increasing the awareness of the progress achieved, but also of the limitations and challenges faced, will aid in accelerating the implementation of QMRA tools for WDN risk management and as a decision-support tool.

Place, publisher, year, edition, pages
2019. Vol. 46, no 3, p. 149-159
Keywords [en]
Gastrointestinal illness, Microbial risk, Quantitative microbial risk assessment (QMRA), Water distribution network, Waterborne outbreak, Decision support systems, Health risks, Potable water, Repair, Reservoirs (water), Risk management, Supply chains, Water distribution systems, Water quality, Decision support tools, Health consequences, Risk quantification, Water distribution networks, Water quality monitoring, Water-borne outbreaks, Risk assessment
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-38230DOI: 10.1139/cjce-2018-0216Scopus ID: 2-s2.0-85062712790OAI: oai:DiVA.org:ri-38230DiVA, id: diva2:1299512
Note

 Funding details: GR; Funding text 1: This study was financed by the Göteborg Region Association of Local Authorities (GR), Sweden. The authors declare no conflicts of interest.

Available from: 2019-03-27 Created: 2019-03-27 Last updated: 2019-03-27Bibliographically approved

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Malm, Annika

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