You might think that the drought would give the sewer system a break, with not as much water going through it. But, while San Franciscans are sending less water down the drain because of conservation, the same, or more sewage is being sent through the system that isn’t being drained as well as before.
“It’s an organic material. It breaks down. It creates hydrogen sulfide. That eats up the concrete in the pipes if it sits there long enough,” Moala said."