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Consumer perception of water quality during an off-flavor event in Fortaleza-Brazil.

Pestana, Carlos Joao; Neto, Jos� Capelo; Barros, M�rio U.G.; Menezes, Indira; G�is, Amanda; Santos, Geovane


Jos� Capelo Neto

M�rio U.G. Barros

Indira Menezes

Amanda G�is

Geovane Santos


During a taste and odor episode (2-methylisoborneol) in a reservoir that supplies the Fortaleza Metropolitan Region, Brazil, two surveys were conducted to determine tap water usage behavior as well as the sensory sensitivity towards off-flavors of participants with the same level of education. Most volunteers did not consume tap water, mainly due to safety concerns (57%) and disagreeable organoleptics (21%). The majority of those who did use tap water (73%) did so because of economic reasons and the remainder because of the use of point-of-use water filtration systems, which rendered the water safer in their perception. The Human Development Index (HDI), as a measure of income, did not influence the rate of rejection. Volunteers from low and medium HDI neighborhoods were as likely to reject tap water as those from high HDI neighborhoods. Chlorine flavor and earthy flavor were the most perceived off-flavors. Water containing moderate amounts of off-flavor compounds (dilution 1:2 tap/bottled water) was considered ‘acceptable’ by volunteers while water containing low concentrations (dilution 1:5 tap/bottled water) was considered ‘good’.


PESTANA, C.J., CAPELO NETO, J., BARROS, M.U.G., MENEZES, I., GÓIS, A. and SANTOS, G. 2019. Consumer perception of water quality during an off-flavor event in Fortaleza-Brazil. Aqua [online], 68(1), pages 63-73. Available from:

Journal Article Type Article
Acceptance Date Oct 25, 2018
Online Publication Date Dec 5, 2018
Publication Date Feb 1, 2019
Deposit Date Jan 17, 2019
Publicly Available Date Dec 6, 2019
Journal Aqua
Print ISSN 2709-8028
Electronic ISSN 2709-8036
Publisher IWA Publishing
Peer Reviewed Peer Reviewed
Volume 68
Issue 1
Pages 63-73
Keywords 2-methylisoborneol; Chlorine; Potable water; Taste and odor
Public URL