What happens in wet weather?
The GRS is susceptible to the same weather conditions as are all other wastewater systems. Conventional tank systems discharge during wet weather events unless they are switched off by the householder. Storage of greywater during wet weather exacerbates the problems of pathogens in the greywater breeding in the tank. Then a large volume of grossly contaminated effleunt is pumped out during dry weather potentiallly causing a health and safety risk. The benefit of the GRS is that stormwater diversion mounds diverts surface water from the irrigation areas leaving retention capacity in the irrigation areas. In extremely heavy weather events greywater may dilute in the stormwater but present no health or safety risk.
