Coffs Harbour Council have recently posted this info on the website:
Residents brewing drinks at home may need to know certain quality characteristics of the Coffs Harbour City Council drinking water supply to successfully set up their home brew operations.
The data below was gathered over a 5 year period and covers the most common queries received by Council from the home brewing community.
Characteristic Average Min Max
Alkalinity as CaCO3 48.92 42.0 65.0
Calcium (mg/L) 20.23 17.3 24.40
Chloride (mg/L) 11.87 10.0 13.00
Magnesium (mg/L) 1.17 0.87 1.44
Sodium (mg/L) 12.06 9.0 15.0
Sulfate (mg/L) 14.91 12.0 23.0