Sorry Dr, I'll put a comma in. The water at West End comes from the Willunga Aquifer, which meanders through Adelaide and is natural, RO water which is then filtered. I'll double check next week if it goes through a Reverse Osmosis process before the public fountain, or straight from spring to filter.
Whilst we are on the subject, I am subjectively believing my beers have been better since collecting water straight from the garden tap, rather than using the Puratap in the house. With some unwanted phenolic reactions though in my lastest Brown Porter, I believe it could be due to an increase in the chloramine in our supply over winter rains. As antiphile stated, I am seriously/ definitely considering using Camden tablets to counteract it next brew.
Your scientific input would be appreciated.