I was actually ask it in general. To answer your question, people use it to water their grass and keep the lawn green. However, kids do play on the grass, so the question would be, do you put this under the same bracket as Treated wastewater effluent.  To elaborate on this: Treated effluent from WWTW (After disinfection) is used by surrounding areas to keep the grass nice. However, we have rules to say that non-contact sports should be played on the grass. So do we put this rule to untreated grey water when using it for the lawn. Here grey water will include shower, baths, sinks and washing machines

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I was actually ask it in general. To answer your question, people use it to water their grass and keep the lawn green. However, kids do play on the grass, so the question would be, do you put this under the same bracket as Treated wastewater effluent. 

To elaborate on this: Treated effluent from WWTW (After disinfection) is used by surrounding areas to keep the grass nice. However, we have rules to say that non-contact sports should be played on the grass. So do we put this rule to untreated grey water when using it for the lawn. Here grey water will include shower, baths, sinks and washing machines