The pipeline leak that spilled sewage into Arizona’s Santa Cruz River is sealed, but another pollution problem persists — one many other American waterways share.
Contaminants of emerging concern, or CECs, are chemicals from drugs and personal care products that most wastewater treatment plants don’t filter out. Some, including estrogenic compounds from products like synthetic birth control, disrupt the hormones of aquatic wildlife, harming reproduction.
Using a technique called satellite radar interferometry, researchers have spotted millimeter-scale ground uplift surrounding four high-pressure injection wells near the eastern Texas city of Timpson. Two of the wells were located directly above a spate of record quakes that struck Timpson in 2012, topping out with a 4.8 magnitude quake on May 17. The other two were located within six miles of the quakes.