
Porta-Potty Holding Tanks: What They Are and Why They Matter
Everyone must go to the bathroom at some point. If you’ve ever been to an outdoor concert or festival, you’ve probably had to use one of those portable restrooms you see lined up in rows. You’ve probably noticed porta-potties at construction sites. Try as you might, you’ve also undoubtedly looked inside the toilet only to see a weird, viscous blue liquid staring back at you. That blue liquid is part of a system called the