Average age of water supply systems in the province reached its oldest peak of 19.9 years in 1995. Since then, the average age of this asset has been reduced through increased rates of investments, dropping to 16.7 years in 2007.
As a percentage of the estimated useful life, the provincial rate has been above the national average for most years since 1961. The rate was 45% in 2007, 5 percentage points over the national average.