dont know if this will help but this is what is in my water taken from yorkshire water site
Calcium
16.3500
mg Ca/l
Magnesium
2.9463
mg Mg/l
Residual chlorine - free
0.29
mg/l Cl2
Residual chlorine - total
0.37
mg/l Cl2
Coliforms
0
no/100ml
E-coli
0
no/100ml
Aluminium
19.365
µg Al/l
Colour
1.25
mg/l Pt/Co Scale
Conductivity
154.12
µS/cm
Fluoride
0.063
mg F/l
pH (Hydrogen Ion Conc.)
8.09
pH Units
Iron
27.73
µg Fe/l
Manganese
3.30
µg Mn/l
Nitrate
4.5349
mg NO3/l
Nitrite
0.0093
mg NO2/l
Sodium
10.58
mg Na/l
Turbidity
0.153
NTU
Copper
0.0101
mg Cu/l
Lead
1.406
µg Pb/l
Environmental Regulator
0
µg Pb/l
Water hardness type: Moderately soft
Water hardness average: 22.6mg/l calcium