So, I tried an experiment.
I took a 20cm wide salad bowl, filled it with water and purposely added some dirt to it and mixed it up well. In the centre of the filled bowl I placed an empty jar. Covering the bowl loosely and placing a rock in the centre, I set it in the sun - where it has remained - from 8.00 a.m. to 4.20 p.m.
I have just removed it from our patio.
That bowl of dirty water produced approximately 35-40ml of clear, clean water. That may seem a little, but given that I used a glass bowl in order to obtain these photographs I'm quite chuffed. I use a solar oven - utilizing black / dark coloured pans as they attract and hold the heat better than a clear vessel. If I had chosen to use a black saucepan for this experiment I'm convinced that I would've obtained far more. Also, a 20cm bowl is very narrow - imagine if the evapouration area was far greater...? 
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😀
I tasted it and it was like drinking normal water 
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😂
Cleaning grey water for re-use is defintely do-able. Obviously this tiny bowl isn't going to make that much of a difference - it's all a matter of scale 
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I would however, caution, that the harvesting jar is thoroughly cleaned and the harvested water should be brought to a rolling boil for 5 - 8 minutes before drinking. This is NOT to be used for black water!
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| The dirty water in the bowl can be seen in this pic |
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| The setup as viewed from above. |
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| The rock was placed in the centre of the clingwrap to encourage water droplets to fall into the jar and not back in the bowl |
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| Moisture collecting on the clingwrap |
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| Droplets of water dripping into the jar - notice the moisture forming on the clingwrap |
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| This simple setup produced +/- 35-40ml of clean water - produced from grey water |
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