I think it changed, a certain time ago you might not have had the technology to clean the water, and plenty of places in the world don't provide this. Whether or not it's a right is based on the values and capabilities of the civilization.
This is not really a valid argument intisde the US. The failure to provide clean drinking water in the US just about requires intent to harm.
This is not really a valid argument intisde the US. The failure to provide clean drinking water in the US just about requires intent to harm.