title: A meta-analysis of public compliance to boil water advisories.
abstract: Water utilities that generally provide continuous and reliable service to their customers may sometimes issue an advisory notification when service is interrupted or water quality is compromised. When the contamination is biological, utilities or the local public health agencies issue a 'boil water advisory' (BWA). The public health effectiveness of a BWA depends strongly on an implicit public understanding and compliance. In this study, a meta-analysis of 11 articles that investigated public compliance to BWA notifications was conducted. Awareness of BWA was moderately high, except in situations involving extreme weather. Reported rates of compliance were generally high, but when rate of awareness and non-compliant behavior such as brushing teeth were factored in, the median effective compliance rate was found to be around 68 percent. This does not include situations where people forgot to boil water for some part of the duration, or ingested contaminated water after the BWA was issued but before they became aware of the notification. The two-thirds compliance rate is thus an over-estimate. Results further suggest that timeliness of receipt, content of the advisory, and number of sources reporting the advisory have a significant impact on public response and compliance. This analysis points to improvements in the phrasing and content of BWA notices that could result in greater compliance, and recommends the use of a standard protocol to limit recall bias and capture the public response accurately.
authors.affiliation: New York State Water Resources Institute, Cornell University, NY, USA. Electronic address: svedach1@jhu.edu.
authors.forename: Sridhar
authors.initials: S
authors.lastname: Vedachalam
authors.affiliation: New York State Water Resources Institute, Cornell University, NY, USA.
authors.forename: Kyra T
authors.initials: KT
authors.lastname: Spotte-Smith
authors.affiliation: New York State Water Resources Institute, Cornell University, NY, USA.
authors.forename: Susan J
authors.initials: SJ
authors.lastname: Riha
mesh_terms: D003258:Consumer Behavior; D054626:Consumer Health Information; D060766:Drinking Water / Q000737:chemistry*; D019983:Guideline Adherence / Q000706:statistics & numerical data*; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D033181:Information Dissemination; D011634:Public Health; D014876:Water Pollution / Q000032:analysis; D060753:Water Quality; D014881:Water Supply
chemical_list: D060766:Drinking Water
keywords: Awareness; Boil water advisory; Compliance; Public health; Water utilities