Sat Sri Akal, family,
If I may add another dimension to the considerations...
In the Shabad Hajaarae it is stated: "You permeate the water, land and sky", so Har is present in the water. Not just in a general, metaphorical sense, but in actual fact; water is a sacred thing.
For a spiritual soul it is incumbent to recognize the sacredness of our blessed Creation; that Har Har Himself has bequeathed us this living world and is in fact present in it, and to take it for granted or view it as mundane is the greatest ingratitude. Consider please: if a man is very thirsty, he will find it hard to do or concentrate on anything else, and before long, water will become the most crucial thing in the world to him. Nothing else will matter, no opinions, preferences, politics, ideals, religions, he must have water.
When we want to drink water, to bathe a baby, to nurture the sick, to water a flower or a field of rice, to cook, -we want pure water. It is absolutely essential and it is the prasaad of God to all living things; it is a sacred element. But in this dark jug in which we live, people view water as a handy resource to be exploited, polluted and used as a convenient waste remover in the form of rivers and oceans. Basically a flowing trash bin.
This is the view of the non-believers, but among spiritual souls we must recognize the real divinity in water.
"There is no sacred land and un-sacred land, there is only sacred land and desecrated land." -Wendell Berry
This quote can also be transposed to water. All water is sacred, so the task of a spiritual soul ought to be ever to regard water, all water, as holy water, and treat it as such.
I believe the Gurus were cautioning against the errant belief that certain waters are charged to wash away sin, and bathing there can undo a life of lawlessness. But in the mindset of holiness, there is no wrong in bathing in the pool of Amritsar, but rather that we extend our spiritual understanding to recognize Waheguru in all the waters He has entrusted us with.