YES, YOU’VE BEEN SIPPING WHAT DALLAS HAS BEEN FLUSHING “For the large chunk of population that lives downstream from a big city and whose water supply flows through a river, more than a few drops of the water in their glasses was probably once in someone else’s toilet,” Neena Satija drily notes in her reassuring survey for the Texas Tribune of sewage-treatment projects throughout the state. Her story is worth checking out for the animated image diagramming the flow from a Fort Worth-area toilet to a Houston highball glass alone (excerpted screenshot shown at left, above), but she does stir up some oft-repeated local poop: “Let’s start with Houston, which, as Texas State University professor Andy Sansom says, ‘has been drinking Dallas’ crap for decades,’” she writes. “Wastewater from Dallas and Fort Worth is deposited into the Trinity River, where it flows down into the lakes that supply Houston residents. The wastewater is so clean that it’s credited with helping the Trinity River stay strong during recent years of severe drought.” [Texas Tribune; previously on Swamplot] Illustration: Todd Wiseman/Alessandro Suraci/Luis Prado