Ontario Hard Water Chart


A tankless system is extremely efficient and relies on its advanced heat exchangers to heat up water nearly instantly.

 

The buildup of scale is increased with heat and thus the inside of a tankless heat exchanger will accumulate an efficiency reducing “blanket” over time. To combat this problem a tankless is usually (always by a reputable company) installed with flush valves, which isolates your homes water pipes yet allows vinegar to be pushed through the system in turn dissolving the build up and returning the tankless to its original efficiency. This process takes roughly an hour. If you live in Ontario we offer a tankless flushing service.
 

There is really no way to descale a conventional storage type tank water heater, those systems simple become increasingly less efficient over time.

Hard Water Causes Inefficiency

Below is an extensive list of Ontario cities and the corresponding water hardness that is present in the water supply. The higher the number of grains the harder your water is, this in turn produces more scale and deposits in your water heater, on shower heads, around faucets etc. A conventional water heater will become much less efficient with time in a hard water situation; in which case I would recommend a tankless that can be cleaned with a vinegar solution, restoring efficiency.

Quick Hard Water Exercise:

  1. Lookup your city and see if you have hard water
  2. Think about how old that 40 gallon hot water tank is in your house
  3. Know that on average at 7.5 grains of hard water a regular tank loses 2% efficiency a year to due scale build up
  4. That 2% doubles to 4% at 15 grains and so on…..
  5. After you do the math a tankless that is able to be cleaned of all scale becomes very economical
  6. Don’t have a tankless? Get a free quote on one from us

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City Hardness (grains) Population
Almonte 17.5 2805
Amhurstburg 6.5 6060
Ancaster 19 6718
Arnprior 12.2 8663
Aurora 17 see Newmarket
Azilda 12 1403
Barrie 9.5 41990
Beamsville 15.6 3864
Belleville 6 34391
Bracebridge 2 5304
Brampton 24.2 58571
Brantford 24 42053
Brockville 7.5 11302
Burks Falls 10 1200
Burlington 9 47562
Carleton Place 5.5 4956
Cayuga 120 905
Chatham 13 19874
Cippawa 8.6 N/A
Clifford 15 660
Clinton 13.2 2136
Cobalt 4 461
Cobourg 7.5 7234
Cochrane 18 2474
Collingwood 4.5 9632
Copper Cliff 2 N/A
Cornwall 7 19290
Craigment 4 N/A
Delhi 18 2819
Deseronto 8.4 1314
Dryden 3.5 5900
Dundas 17 10320
Dunnville 21 3830
Elmira 29 390
Essex 33.4 3658
Etobicoke 8 109153
Fonthill 15.6 2495
Fort Williams 1 N/A
Galt 22 930
Gannonoque 7 3759
Goderich 5.5 4808
Grimsby 8 6821
Guelph 22 30652
Hagersville 30 2055
Haileybury 2 1243
Hamilton 7.5 147943
Harrow 49.8 3112
Hanover 13 3915
Hawkesbury 2 5300
Hespeler 26 550
Ingersoll 24.4 4269
Iroquois Falls 4.5 2005
Islington 16.2 20137
Kapuskasing 6 3490
Kemptville 16.4 6130
Kenora 4 9929
Kingston 7.5 37776
Kirkland Lake 3 4712
Kitchener 40 87480
Lansing 21 N/A
Leamington 14 17253
Lindsay 8.5 27220
Listowel 13 9907
London 25 149133
Lucan 13 N/A
Lucknow 16.4 977
Meaford 12 2978
Merritton 8.5 N/A
Midland 8 16268
Mitchell 16.2 1907
Matawa 5  
Mount Forest 25 2937
New Liskeard 16 3306
Newmarket 10.5 53915
New Toronto 8 see Toronto
Niagara Falls 8 29250
North Bay 1 24960
North York Twsp. 18 173099
Norwick 14 1220
Oakville 7 34364
Orillia 10 19999
Oshawa 7.5 38796
Ottawa 3 181258
Owen Sound 15 20688
Paisley 19.5 829
Paris 20 2984
Parkhill 14 1145
Parry Sound 4 3020
Pembroke 2 15357
Penetanguishene 7.5 see Midland
Perth 4 5596
Peterborough 5 40913
Picton 7 2265
Port Arthur 6 N/A
Port Colborne 7 6291
Port Dover 13.2 N/A
Port Elgin 38.4 1852
Port Hope 7.5 5553
Prescott 7 3553
Preston 17 620
Renfrew 2.5 12221
Richmond Hill 17.2 72717
St. Catharines 7 40750
St. Mary’s 22.8 1475
St. Thomas 11.5 29300
Sarnia 7 38869
Sault Ste. Marie 3 29847
Scarborough 8.5 155061
Seaforth 17.5 1496
Shelburne 12 N/A
Simcoe 12 16900
Smith Falls 5 6904
Stratford 30 14604
Strathroy 17.5 5543
Sturgeon Falls 2 3134
Sudbury 2.5 53168
Tavistock 30.4 1893
Tecumseh 7.8 5953
Teeswater 32 616
Thorold 8 5848
Tillsonburg 12 8925
Timmins 2 19055
Toronto 7.5 319202
Trenton 14 6120
Twin Province 17.5 N/A
Uxbridge 15.4 3533
Walkerton 8.8 2651
Wallaceburg 6.5 5822
Waterloo 28 see Kitchener
Welland 8 19258
Weston 10 9448
Whitby 7.5 19750
Windsor 6 72436
Woodbridge 16.2 11770
Woodroffe 22.5 N/A
Woodstock 2.5 26041

It’s always a good idea to have your water tested to determine not only water quality but water hardness and this list should be considered just a rough guide.