What are the differences between tap water and river water?

I actually did a science fair project on this topic. It turns out that the greywater is more beneficial towards the plants as opposed to tap water. I tested on bean plants, sweet peas, and radishes, and they all seemed to enjoy being fed the greywater.

My greywater solution was made up of mostly washing machine detergent, but it can also be from your shower or sink. If you're thinking about installing a greywater system in your backyard/front yard, I say, "Go for it!!!" It's a really easy hook-up.

Say you want to install one from your washing machine. Attach the correct hose to it and lead it out of a window (or over a bump) to prevent a siphon from forming, which would drain all of the water out of our washing machine.

Citrus plants really seem to enjoy the greywater. If I was to say one plant that wouldn't thrive best being fed greywater, I'd have to say grass because the greywater can pool and become stagnant. Other than that, greywater is highly nutritious and will benefit your garden.