Jag hade mer tankar om kranvatten håller "minst" ett par år i pet-flaskor ståendes mörkt och hyfsat svalt. Minst en vecka låter ju i mina öron som ett helt onödigt råd, som får ängsligt folk att blaska med vattenflaskor och dunkar på tok för ofta.
Ja, jag verkar ha rätt och rådet om "minst en vecka" kan man alltså helt ignorera. Går verkligen våra skattepengar till den där MSB / fd Räddningsverket???
Keeps for ages
The answer is yes, according to
Truls Krogh, director of the Department of Water Hygiene at the Norwegian Institute of Public Health.
“If the water is covered and of good quality to start with, in principle it can last a thousand years,” he says.
This also goes for water from the faucet.
“Of course there can’t be much organic matter in the water, which there isn’t in the water most Norwegian homes have on tap. As long as
it’s been contained in a closed bottle that doesn’t let any substances into the contents it can keep for years without becoming dangerous to drink,” says Krogh.
Even if the bottle has been opened and you’ve taken a few swigs right from it.
[...]
Krogh’s assurances force another question to the surface:
If water doesn’t get bad – why is there a shelf-life date printed on the bottle cap when we buy it in the store?
“This is probably the result of a bureaucratic decision,” says Krogh.
And then there’s the taste. The fact that water is drinkable doesn’t mean it still tastes okay.
http://sciencenordic.com/can-water-spoilÖversatt: tillslutet förvarat kranvatten håller flera år.