Okies, I just got an email back from my Water company to see what they add, here it is.

pH - 7.3
Ammonium - <0.01 mg NH4/l
Nitrite - <1 mg NO2/l
Nitrate – 36 mg NO3/l
Calcium Carbonate 285 mg CaCO3/l
Hardness – 19.95 English Clarke degrees
Free chlorine – 0.23 mg Cl/l
Total chlorine – 0.26 mg Cl/l
Chloramine - No tests done as no chloramination is carried out.

That gives my tap water a KH of about 16 degrees doesnt it? *boggle* Or am I doing something wrong?