Lots of stormwater lines in Texas cities/suburbs are straight to water sources. Lots of PSAs and signs and what not about storm drains going to rivers and lakes

Lots of stormwater lines in Texas cities/suburbs are straight to water sources. Lots of PSAs and signs and what not about storm drains going to rivers and lakes and what not. They don't often hit a lot of treatment plants. As a kid I had a lot of fun exploring the underground of the storm drains.