For our personal water waste, is the ARA in Gossau responsible. It is located in the outskirt Gossau and covers the usage of ca. 15'000 people. The system started in 1971 and the last expansion was a new filter in 2012. The coordinates are 2699 058 / 1240 065.
The waters are the Greifensee, the Aabach and the Gossauerbach.
Fabrizio and Yanik