I can tell you that this whole process is a joke. And based on latest Odra River contamination. No one would bother to inform you that river got polluted and it would be kept quiet till its impossible to hide anymore,(reply>), No it's not. Monitoring of water that is put into people taps is different than for rivers that are not used for drinking. Also that the reason you wold not be able to hide it - because people need water.