I'm sorry, re-reading my comment it comes across very harsh. I didn't mean that. The government certainly regulates the requirements for water to be considered drinkable. However it is probably not feasible to make all tap water on an island drinkable. Most of the water running through the tap is not consumed (like shower, laundry, flushing, etc.) so it might be smarter to make the water clean enough for those jobs and then advise to consume only bottled water.

Why do you assume mainland tap water and tap water on a tiny island far out in the ocean have the same quality? In spain mainland tap water is generally considered drinkable.

My OnePlus also does that

Es ist aber effizienter Materie in grossen industriellen Generatoren zu verbrennen, den erzeugten Strom durchs Netz ins Auto zu pressen und zu nutzen als wenn jedes Auto für 5 km Fahrt die Materie bei nichtoptimalen Drehzahlen und Temperaturen in ineffizienten Motoren verbrennt.

So if you communicate with someone you will specify the date in the year 2023 september 23rd we shall meet and not 23rd of september 🧐