Look on your water company's website to see what they say. You need a number and the unit of measurement - there are about half a dozen units and fish keeping uses just 2 of them.
		
		
	 
The ones I referenced in the main post were ones that I tested myself from the tank. 
This is what the water company says for my area. (Long as all the information is present.)
Total hardness as Calcium (mg/l)    89.6
Total hardness as Calcium carbonate (mg/l)    224
Total hardness as Degrees Clark (°Clark or °e) 15.59
Total hardness as Degrees French (°f)    22.4
Total hardness as Degrees German (°dH) 12.723
Total hardness as millimoles (mmol/l of Ca) 2.24
1,2-dichloroethane µg/l <0.433
Alkalinity (as calcium carbonate) mg/l 196    
Aluminium µg/l <7
Ammonium mg/l <0.162  
Antimony µg/l 0.31    
Arsenic µg/l 0.35
Benzene µg/l <0.183  
Benzo(a)pyrene µg/l <0.002
Boron mg/l 0.087    
Bromate µg/l <1.2    
Cadmium µg/l <0.025    
Calcium mg/l 74.8
Chloride mg/l 65.3    
Chlorine (free) mg/l <0.06
Chlorine (total) mg/l 0.62    
Chromium µg/l <0.454  
Colour mg/l <0.98    
Conductivity µS/cm @ 20 °C  621    
Copper mg/l 0.005
Cyanide µg/l <3.666  
Fluoride mg/l  0.283  
Hardness (total) as calcium mg/l 89.6
Iron µg/l 23    
Lead µg/l 2.46    
Magnesium mg/l 9.07    
Manganese µg/l  <3    
Nickel µg/l 1.75    
Nitrate mg/l 18.1
Nitrite mg/l  <0.037    
Nitrite/Nitrate 0.366
PAHs (sum of 4) µg/l 0
pH (Hydrogen ion) pH value 7.53    
Phosphorus mg/l 1.036  
Potassium mg/l 9.59    
Selenium µg/l <0.722  
Sodium mg/l 41.3    
Solvents (tetrachloroethane and trichloroethene) µg/l 0
Sulphate mg/l 117
Tetrachloromethane µg/l <0.313  
Total organic carbon (TOC) mg/l 3.42
Turbidity  NTU  <0.18    
PESTICIDES
2,4-D µg/l <0.01    
Bentazone µg/l <0.008
Carbetamide  µg/l <0.014    
Chloridazon  µg/l <0.012    
Clopyralid µg/l <0.019    
Ethofumesate µg/l <0.008  
Flufenacet  µg/l <0.011    
Fluroxypyr µg/l  <0.02    
Glyphosate µg/l <0.007
Linuron µg/l <0.014
MCPA µg/l <0.008  
MCPB µg/l <0.006  
MCPP (Mecoprop) µg/l <0.006
Metaldehyde µg/l 0.03    
Metazachlor µg/l <0.03    
Pesticides - Total µg/l 0.051    
Propyzamide  µg/l     <0.013    
Quinmerac µg/l <0.013    
Terbuthylazine µg/l <0.006
<    Below the limit of detection of our analysis
mg/l    Milligrammes per litre or parts per million
µg/l    Microgrammes per litre or parts per billion
Pt/Co    Platinum/Cobalt
µS/cm    Micro Siemens per centimetre
Bq/l    Becquerel per litre
mSv/year    Micro Sieverts per year
NTU    Nephelometric Turbidity Units
This is all the information that I could get. And that the company counts my area as hard water.