"If you don't have a fountain in your garden, at least place a bird bath on the ground so rabbits and other creatures can have a watersource, " she says.
Caffeine is often used as a marker of wastewater contaminants, so that means there might be other pollutants in the water that also have a human source, Granek said.
Fracking involves the injection of water containing a surfactant and various other chemicals under high pressure into a source rock e.g. shale, causing the latter to fracture and release natural gas (principally methane).