I won't repeat what he said as it's as sourceless as what I said before, but it's a problem, builders complain about it, the infrastructure for the city is not well run. Here's two sources for problems like in the past month:

This two are the same problem: http://www.austintexas.gov/news/sanitary-sewer-overflow-repo... https://www.kxan.com/news/local/austin/sewer-overflow-sends-...

https://www.kxan.com/investigations/93-of-austins-stormwater...