You can find the source of the images here below,
https://pixabay.com/en/glass-drink-water-earth-blue-2655954/
https://pixabay.com/en/drinking-water-water-food-drip-597001/
https://pixabay.com/en/tap-water-save-water-3507255/
https://pixabay.com/en/nature-conservation-responsibility-480985/
https://pixabay.com/en/water-aqua-drop-hand-158959/
https://pixabay.com/en/rain-water-element-drop-of-water-1563957/