It is one of the stranger habits of modern life: in city after city with safe, regulated tap water, people keep paying hundreds of times more for water in a plastic bottle. A survey of 15,000 people across 81 countries has now underlined how persistent that habit is, even as awareness of microplastics grows. The interesting question is not why consumers are irrational — it is what public policy has failed to do.
This article focuses on the policy angle: what cities, regulators and water utilities can actually do. If governments want fewer plastic bottles, lectures will not be enough. Trust has to be built, visibly and locally, by the institutions that supply the tap.
Transparency first: publish the data, in plain language
The most effective step a utility can take is radical, routine transparency. Water quality results should be published frequently, in language a non-specialist can understand, at neighbourhood level rather than as city-wide averages that hide local problems. Independent testing, publicly visible sampling, and honest reporting when something goes wrong all matter more than glossy assurance campaigns. International guidance from bodies such as the World Health Organization consistently stresses risk-based monitoring and communication; the lesson for cities is that trust follows evidence people can check, not slogans they are asked to believe.
Fix the pipes, and be seen to fix them
Perception often tracks reality more closely than officials like to admit. Discoloured water, intermittent pressure, old lead connections and neglected public buildings tell residents a story no campaign can overwrite. Capital programmes that replace ageing mains, prioritise the districts with the worst records, and publish progress street by street serve two purposes at once: they improve the water, and they demonstrate competence. Maintenance basics — flushing, corrosion control, rapid response to complaints — are unglamorous, but they are the substance from which confidence in a public service is actually made.
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Make the tap the easy choice
Convenience is bottled water’s strongest advantage, so policy should compete on it directly. Well-maintained public drinking fountains, free refill stations in stations, schools, parks and government buildings, and requirements for free tap water in restaurants all shift the default. Schools are especially powerful: children who grow up filling bottles from a tap they trust carry the habit into adulthood. Deposit schemes and recycled-content rules for bottles still have a role, but they manage the symptom; refill infrastructure attacks the reason the bottle was bought in the first place.
Regulate fairly, and protect the households with the least choice
Pricing and regulation need a careful balance. Charges on single-use plastics can help, but they fall hardest on low-income households and on neighbourhoods where tap trust is lowest for good historical reasons. The fair sequence is to invest first, communicate honestly, and only then tighten rules on bottles — while guaranteeing that safe tap water is genuinely available to everyone, including renters, informal settlements and rural communities served by small systems. Done in that order, policy stops punishing people for a failure of public provision and starts repairing it.
For wider background, see the resources and reporting collected by the World Health Organization, which track the evidence behind the claims on both sides of this debate.
What success would look like
Success will not arrive as a single announcement. It will look like fountains that work, test results people actually read, pipes replaced on schedule, and a generation for whom carrying a refillable bottle is unremarkable. The survey across 81 countries is best read as a challenge to institutions rather than to consumers: bottled water endures where public water has not yet earned complete confidence. Cities and regulators that treat trust as infrastructure — built slowly, maintained constantly, and lost quickly — are the ones most likely to turn the tap back into the obvious choice.
What the survey really tells policymakers
The headline finding — that bottled-water use persists despite widespread concern about microplastics — suggests information alone does not change behaviour. People who buy bottled water typically cite taste, convenience, habit and, above all, doubt about what comes out of their tap. In places where supplies have been contaminated, where pipes are old, or where officials once hid a problem, that doubt is rational. Policy therefore has to start from an uncomfortable admission: in many communities, the tap lost an argument about trust long before plastic became the issue, and winning it back is a governance project, not a marketing one.
