Do the potty police have science on their side?

[Jammer]

So, is there any science behind the widespread use of no-discharge zones, that is, where properly treated sewage can't be discharged?


Given that the MSDs have improved since the regulations were adopted in the 1970s, is that science still valid?


In light of the fact that there is inherently some spillage of wholly untreated sewage during pumpout and disposal, is pumpout still an environmentally "greener" approach than treating sewage onboard?