Tom
RA is licensed to capture 200 ML, which is captured mainly in winter and discharged into the aquifer, then pumped out and 200 ML put on course in the summer.
The salinity has halved by doing this, to about 500 parts salt. Not perfect, but eminently better than over 1000 parts and facing potential water restrictions.
Nearby on the Adelaide sandbelt, Glenelg and The Grange are also doing this. I don't know how successful they are.
A few years ago, Pennant Hills in Sydney was tapping into the nearby trunk sewer, doing some on-site processing and using that to irrigate during the drought. Not sure how successful this was (I just don't know) or whether they are still doing it. The Sydney drought is over for now.
James B