Health-risk assessment for roof-harvested rainwater via QMRA in Ikorodu area, Lagos, Nigeria

This paper presents a study to assess the roof-harvested rainwater (RHRW) in the Ikorodu area of Lagos state, Nigeria, and recommends guidance to minimise the health risk for its households. The types, design and use of rainwater harvesting systems have been evaluated in the study area to inspect th...

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Autores principales:	Chukwuemeka Kingsley John, Jaan H. Pu, Rodrigo Moruzzi, Manish Pandey
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	escherichia coli (e. coli) household water treatment technique (hwtt) quantitative microbial risk assessment (qmra) questionnaire survey roof-harvested rainwater (rhrw) Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/d1a1fee6144b44ed946231e23d75b6e9
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spelling	oai:doaj.org-article:d1a1fee6144b44ed946231e23d75b6e92021-11-05T19:07:38ZHealth-risk assessment for roof-harvested rainwater via QMRA in Ikorodu area, Lagos, Nigeria2040-22442408-935410.2166/wcc.2021.025https://doaj.org/article/d1a1fee6144b44ed946231e23d75b6e92021-09-01T00:00:00Zhttp://jwcc.iwaponline.com/content/12/6/2479https://doaj.org/toc/2040-2244https://doaj.org/toc/2408-9354This paper presents a study to assess the roof-harvested rainwater (RHRW) in the Ikorodu area of Lagos state, Nigeria, and recommends guidance to minimise the health risk for its households. The types, design and use of rainwater harvesting systems have been evaluated in the study area to inspect the human risk of exposure to Escherichia coli (E. coli). To achieve these objectives, a detailed survey involving 125 households has been conducted which showed that 25% of them drink RHRW. Quantitative microbial risk assessment (QMRA) analysis has been used to quantify the risk of exposure to harmful E. coli from RHRW utilised as potable water, based on the ingestion of 2 L of rainwater per day per capita. Results have revealed that the maximum E. coli exposure risk from the consumption of RHRW, without application of any household water treatment technique (HWTTs) and with application of alum only, were 100 and 96 respectively, for the estimated number of infection risk per 10,000 exposed households per year. This estimation has been done based on 7% of E. coli as viable and harmful. Conclusively, it is necessary that a form of disinfectant be applied to the RHRW before use. HIGHLIGHTS It consists of a case study of roof-harvested rainwater at Ikorodu area of Lagos, Nigeria.; The QMRA analysis has been used to quantify the risk of infection associated with the exposure to potential pathogens from roof-harvested rainwater.; This paper presents a pilot rainwater quality study at the investigated area, which involves a detailed household surveying technique to acquire the needed research information.;Chukwuemeka Kingsley JohnJaan H. PuRodrigo MoruzziManish PandeyIWA Publishingarticleescherichia coli (e. coli)household water treatment technique (hwtt)quantitative microbial risk assessment (qmra)questionnaire surveyroof-harvested rainwater (rhrw)Environmental technology. Sanitary engineeringTD1-1066Environmental sciencesGE1-350ENJournal of Water and Climate Change, Vol 12, Iss 6, Pp 2479-2494 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	escherichia coli (e. coli) household water treatment technique (hwtt) quantitative microbial risk assessment (qmra) questionnaire survey roof-harvested rainwater (rhrw) Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
spellingShingle	escherichia coli (e. coli) household water treatment technique (hwtt) quantitative microbial risk assessment (qmra) questionnaire survey roof-harvested rainwater (rhrw) Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Chukwuemeka Kingsley John Jaan H. Pu Rodrigo Moruzzi Manish Pandey Health-risk assessment for roof-harvested rainwater via QMRA in Ikorodu area, Lagos, Nigeria
description	This paper presents a study to assess the roof-harvested rainwater (RHRW) in the Ikorodu area of Lagos state, Nigeria, and recommends guidance to minimise the health risk for its households. The types, design and use of rainwater harvesting systems have been evaluated in the study area to inspect the human risk of exposure to Escherichia coli (E. coli). To achieve these objectives, a detailed survey involving 125 households has been conducted which showed that 25% of them drink RHRW. Quantitative microbial risk assessment (QMRA) analysis has been used to quantify the risk of exposure to harmful E. coli from RHRW utilised as potable water, based on the ingestion of 2 L of rainwater per day per capita. Results have revealed that the maximum E. coli exposure risk from the consumption of RHRW, without application of any household water treatment technique (HWTTs) and with application of alum only, were 100 and 96 respectively, for the estimated number of infection risk per 10,000 exposed households per year. This estimation has been done based on 7% of E. coli as viable and harmful. Conclusively, it is necessary that a form of disinfectant be applied to the RHRW before use. HIGHLIGHTS It consists of a case study of roof-harvested rainwater at Ikorodu area of Lagos, Nigeria.; The QMRA analysis has been used to quantify the risk of infection associated with the exposure to potential pathogens from roof-harvested rainwater.; This paper presents a pilot rainwater quality study at the investigated area, which involves a detailed household surveying technique to acquire the needed research information.;
format	article
author	Chukwuemeka Kingsley John Jaan H. Pu Rodrigo Moruzzi Manish Pandey
author_facet	Chukwuemeka Kingsley John Jaan H. Pu Rodrigo Moruzzi Manish Pandey
author_sort	Chukwuemeka Kingsley John
title	Health-risk assessment for roof-harvested rainwater via QMRA in Ikorodu area, Lagos, Nigeria
title_short	Health-risk assessment for roof-harvested rainwater via QMRA in Ikorodu area, Lagos, Nigeria
title_full	Health-risk assessment for roof-harvested rainwater via QMRA in Ikorodu area, Lagos, Nigeria
title_fullStr	Health-risk assessment for roof-harvested rainwater via QMRA in Ikorodu area, Lagos, Nigeria
title_full_unstemmed	Health-risk assessment for roof-harvested rainwater via QMRA in Ikorodu area, Lagos, Nigeria
title_sort	health-risk assessment for roof-harvested rainwater via qmra in ikorodu area, lagos, nigeria
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/d1a1fee6144b44ed946231e23d75b6e9
work_keys_str_mv	AT chukwuemekakingsleyjohn healthriskassessmentforroofharvestedrainwaterviaqmrainikoroduarealagosnigeria AT jaanhpu healthriskassessmentforroofharvestedrainwaterviaqmrainikoroduarealagosnigeria AT rodrigomoruzzi healthriskassessmentforroofharvestedrainwaterviaqmrainikoroduarealagosnigeria AT manishpandey healthriskassessmentforroofharvestedrainwaterviaqmrainikoroduarealagosnigeria
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Health-risk assessment for roof-harvested rainwater via QMRA in Ikorodu area, Lagos, Nigeria

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