What is said about the city of Atlanta is true. This combining of storm drains and sanitary drains involves the downtown area, a part of Fulton County. He goes on to explain that most of the other dozen counties that make up metro Atlanta (not part of the city itself) have separated systems and disposal methods and enforcement on some level.
This conference, I believe, took place a few years ago in Houston. Progress has been slow.
This combined system is similar to systems found in a few major cities, including Washington, DC.
Keep in mind that this same area is part of a huge drought plain that has been close to running out of water for the last couple of years. For a short period of time, all pressure washing activity was closed down in Gwinnett County last year. Officials are concentrating on solving the lack of water issues a little harder than they are trying to solve the drain system problems.
Hotlanta has a lot of problems in this area, and it affects the folks who make their living using water. Hopefully they will improve the water situation and the drain situation simultaneously.