Please visit the below websites.
This “grey” water is then reused to flush the toilet or for irrigation, ... but it came with the house and it is hard to get rid of
ALTERNATIVE GREY WATER SYSTEMS
Household wastewater typically contains all the water from toilet flushings (blackwater) as ... it should never be used to dump something to "get rid of it.
Make Better Use of Your Toilet Water
Why not take it further and have the grey water coming out of the actual sink go ... in my own cramped bathroom, as soon as I manage to get ahold of a hand
Common Greywater Mistakes and Preferred PracticesIf your goal is to just get rid of grey water responsibly and irrigation is ..... from a constructed wetland, it may be worth supplying it to the toilet.