In certain State and County campgrounds in CALIFORNIA, which probably has the most restrictions of any State in the Union, dumping your grey water is not only allowed, it's encouraged. For those stating it's ILLEGAL, I say, I'm from Missouri, Show me.....and I don't think any RVr generates 250-400 Gallons per DAY...so that doesn't apply.
As posted above, If it's not prohibited by the CG rules, I don't have an issue with letting it trickle in the bushes...if that makes me insane, call the white coat folks......:W....Dennis