100,000-Gallon Sewer Spill Hits East Side

Sewage spills are gross on their face, but the real story here is infrastructure. A 24-inch sewer main on San Antonio’s East Side gave way near Bicentennial Road and Interstate 10 East, and more than 100,000 gallons of wastewater ended up in Rosillo Creek. SAWS says the spill was contained, but the creek and the area around it are the problem now — not just the broken pipe. What changed last week is that heavy rain didn’t just overwhelm streets. It appears to have helped collapse a major line beneath them. ### Where did the spill happen? The break was reported near the intersection of Bicentennial Road and I-10 East, on the city’s East or Northeast Side depending on how outlets described the area. The wastewater flowed into Rosillo Creek, which is why SAWS told residents to stay out of the water and avoid contact nearby while crews worked. This is here. ### What actually broke? The failed pipe was a 24-inch concrete sewer main. That matters because this was not a small service line to a few homes. It was a big trunk line carrying sewage through the system. When a main that size collapses, the volume adds up fast, and once sewage reaches a creek, cleanup gets harder because the water keeps moving the contamination downstream. ### Why did it collapse? SAWS tied the collapse to recent heavy rains and localized flooding. Basically, the ground and the pipe structure took a hit at the same time. Concrete sewer mains can weaken over time, and stormwater can turn a vulnerable section into a failure point. The catch is that even if a sewer system is being upgraded overall, one bad segment can still break under stress. That seems to be what happened here. ### How bad is 100,000 gallons? It is a lot, but context helps. SAWS said rainwater diluted the spill, which likely reduced some immediate concentration in the creek. But diluted sewage is still sewage. The main public-health advice stayed simple — avoid the creek, keep pets away, and let crews finish repairs and cleanup. If you can smell it or touch standing water connected to the creek, that is the wrong place to be. ### What is SAWS doing now? Crews established a bypass so wastewater could keep moving around the damaged section while repairs continued. That is the standard emergency move — think of it like building a temporary detour around a washed-out highway lane. The point is to stop more sewage from escaping while workers dig out and replace the failed segment. KENS reported crews were also racing to finish before another round of rain. ### Isn’t San Antonio supposed to be fixing this already? Yes — and that is what makes the spill more frustrating than surprising. SAWS says it has invested about $1.2 billion over 12 years under its EPA consent decree work, and the utility also said 2024 ended with a record low 132 sewer overflows citywide. So the broad trend has improved. But ongoing meet. ### So what should residents take from this? The immediate takeaway is practical — stay out of Rosillo Creek until SAWS says the area is clear. The bigger takeaway is that sewer resilience is not the same thing as sewer invincibility. San Antonio has made progress, but storms still find the weak spots. And when the weak spot is a 24-inch main, the consequences get very visible very fast.