Not clean enough to be considered potable, but good enough to water your lawn or use as a separate grey water system if you're set up for it. A lot of people w

Not clean enough to be considered potable, but good enough to water your lawn or use as a separate grey water system if you're set up for it. A lot of people who do this will have a complete filtration system so it can be used for all of their water needs. Personally, I have some rain barrels for watering my garden and a small emergency filtration kit that I can use in the extremely unlikely situation we need it