I've done the arithmetic. Even if residents used NO WATER AT ALL we would run out of water entirely due to evaporation by April 2018. Reducing to 500 ML per day actually only gives us about an extra 5 days of water use from the dams. The reductions achieved have been phenomenal. In January 2015 production was 1200 ML per day. In January this year it was down to 800 ML and now 600 ML.