Water Hardness Level By City - Ontario

The Ontario Water Hardness data presented in this chart has all been verified by Aquatell directly from primary sources. Typically, this means we found the data on municipal water reports or we emailed or talked with municipal officials from the public utilities department.

If the water hardness data from your city is missing from this list please contact us and let us know. We can typically track down the info and add it to our chart in about a week.

If you're looking to reduce your water hardness level, have a look at a professional-grade water softener.

Back to Canada Water Hardness Data

City Name	Province	Hardness mg/L	Hardness Grains/Gallon	Source
Acton	ON	312	22
Almonte	ON	361 - 463	21 - 27
Ajax	ON	125	7.3
Alliston	ON	90	5.3
Amherstburg	ON	102	6.0
Ancaster	ON	120	8.4
Ansnorveldt	ON	118	6.9
Armow	ON	300	17.5	Source
Arnprior	ON	50	2.9
Aurora	ON	130	7.6	Source
Ayr	ON	359	21	Source
Azilda	ON	80 - 100	4.7 - 5.8
Baden	ON	342	20	Source
Ballantrae/Musselman’s Lake	ON	176	10.3	Source
Barrie (North & Central - Groundwater)	ON	222.3 - 342	13 - 20	Source
Barrie (South - Surface Water)	ON	51.3 - 136.8	3 - 8	Source
Barry's Bay	ON	15 - 38	0.9 - 2.2	Source
Batawa	ON	115	6.7
Bayside	ON	115	6.7
Beachville	ON	428	25
Beamsville	ON	242	14.2
Beaverton	ON	148	8.7	Source
Beeton	ON	90	5.3
Belleville	ON	100 - 144	5.8 - 8.4
Belmont	ON	185	11
Birch Point	ON	380	22	Source
Blackstock	ON	316	18.5	Source
Bobcaygeon	ON	76	4	Source
Bolton	ON	115 - 128	7 - 7.6
Bowmanville	ON	125	7.3	Source
Bracebridge	ON	8 - 12	137 - 205
Bradford	ON	7.7 - 9.1	131.7 - 155.6	Source
Brampton	ON	115 - 128	7 - 7.6
Branchton Meadows	ON	461.7	27	Source
Brantford	ON	310	18	Source
Breslau	ON	427.5	25	Source
Bright	ON	410	24
Brighton	ON	273	16
Brockville	ON	120	7
Brownsville	ON	85.5	5
Brooklin		125	7.3	Source
Buckingham Woods	ON	286	16.6	Source
Burks Falls	ON	171	10
Burlington	ON	121	8.6
Canadiana Shores	ON	367	21	Source
Cainsville	ON	376	22	Source
Caledon East (Palgrave System)	ON	274 - 376	16 - 22
Cambridge (click for more info)	ON	291 - 650	17 - 38	Source
Campbellville	ON	335	23.5
Cannington	ON	312	18.2	Source
Carleton Place	ON	166-427	9.7 - 24.9
Carlisle	ON	390	22.8	Source
Carp	ON	200	11.7	Source
Cayuga	ON	120	8.4
Chatham	ON	110 - 120	6.4 - 7.0
Chepstow	ON	239.4	14
Chippawa	ON	131	7.7	Source
Churchill	ON	53.7	3.1	Source
Clifford	ON	250	14.6
Clinton	ON	320	18.7
Cobalt	ON	55	3.2
Cobourg	ON	115	6.7
Cochrane	ON	350 - 380	20.5 - 22.2
Collingwood	ON	86 - 94	5 - 5.5	Source
Colling-Woodlands	ON	306	17.9	Source
Conestogo - East of Grand River	ON	547	32	Source
Conestogo - West of Grand River	ON	359	21	Source
Copper Cliff	ON	80 - 100	4.7 - 5.8
Cornwall	ON	120	7
Courtland	ON	231.9	13.6	Source
Creemore	ON	352	20.6	Source
Delhi	ON	231.9	13.6	Source
Derham Centre	ON	308	18
Deseronto	ON	103 - 122	6 - 7.1
Dexter	ON	120	7
Dorchester	ON	267	15.6	Source
Drumbo	ON	359	21
Dutton	ON	132	7.7
Dryden	ON	60	3.5
Dundas	ON	120	8.4
Dunnville	ON	120	8.4
Elmira	ON	325	19
Elora	ON	423	30	Source
Embro	ON	490	28.7	Source
Essex	ON	120	7
Etobicoke	ON	121 - 142	7.1 - 8.3
Fenelon Falls	ON	52	3	Source
Fergus	ON	540	38	Source
Fonthill	ON	254	14.9
Fort Williams	ON	30 - 60	1.8 - 3.5
Frankford	ON	115	6.7
Foxboro Green	ON	975	57	Source
Freelton	ON	360	21.1	Source
Galt	ON	342 - 410	20 - 24
Gannonoque	ON	60 - 120	3.5 - 7
Georgetown	ON	336	23.6
Georgina	ON	145	8.5	Source
Glencoe	ON	132	7.7
Goderich	ON	103	6
Greely	ON	350	20.5	Source
Greenbank	ON	276	16.1	Source
Greensville	ON	500	29.2	Source
Grimsby	ON	119	7	Source
Guelph	ON	360 - 550	21 - 32	Source
Hagersville	ON	120	8.4
Haileybury	ON	85.6	5
Hamilton	ON	120	8.4	Source
Hampton	ON	309	18.1
Hanover	ON	290 - 510	17 - 29.8
Harrow	ON	120	7
Hawkesbury	ON	54.3	3.2	Source
Heidelberg	ON	547	32
Hespeler	ON	325	19
Hickson	ON	376	22
Holland Landing	ON	171	10	Source
Huntsville	ON	13.9	0.8	Source
Ingersoll	ON	325	19
Innerkip	ON	1094	64
Innisfil Heights	ON	189	11.1	Source
Innisfil Lake Simcoe	ON	126	7.4	Source
Iroquois Falls	ON	81	4.7
Islington	ON	121 - 142	7.1 - 8.3
Janetville	ON	233	14
Kapuskasing	ON	80	4.7	Source
Kemptville	ON	400	23
Kenora	ON	72	4.2
Keswick	ON	150	8.8	Source
Kincardine	ON	95	5.6
Kings Bay	ON	352	21	Source
King City	ON	127	7.4	Source
Kingston	ON	483 - 531, 120 - 133	28 - 31, 7 - 7.8	Source
Kinmount	ON	47	3
Kirkland Lake	ON	40	2.3
Kitchener (click for more info)	ON	291 - 650	17 - 38	Source
Kleinburg	ON	126	7.4	Source
Lake Rosalind	ON	428	25
Lakeside	ON	222	13
Lansdowne	ON	300 - 400	18 - 23
Lansing	ON	121 - 142	7 - 8.3
Lawton's Corners	ON	120	7
Leamington	ON	120	7
Lindsay	ON	180	11
Linwood	ON	137	8	Source
Listowel	ON	261	15.3
Lloyd Brown	ON	530	31	Source
London	ON	89.5 - 113	5.3 - 6.6	Source
Lucan	ON	102	6
Lucknow	ON	206 - 209	12.03 - 12.0
Lyndale	ON	120	7
Lynden	ON	51	3.0	Source
Lynhurst	ON	120	7
Manilla	ON	155	9
Mannheim Village	ON	428	25	Source
Manorview	ON	174	10
Mapleton	ON	120	7
Markham	ON	125	7.3	Source
Mariposa Estates	ON	303	18
Maryhill	ON	359	21	Source
Mattawa	ON	52.4	3
McKean	ON	340	19.9	Source
Meaford	ON	90.7	5.3
Melbourne	ON	132	7.7
Merrickville	ON	380	22.2
Merritton	ON	124	7.3	Source
Midland	ON	257 - 513	15 - 30
Milton (more info here)	ON	125 - 295	8.8 -20.7
Mitchell	ON	479	28
Mississauga	ON	115 - 128	7 - 7.6
Mount Elgin	ON	291	17
Mount Forest	ON	269 - 300	15.7 - 17.5
Mount Albert	ON	320	18.7	Source
Mt. Pleasannt	ON	366	21.4	Source
Munster	ON	285	16.7	Source
Musselman's Lake	ON	174	10.2
Newcastle	ON	125	7.3	Source
New Dundee	ON	359	21	Source
New Hamburg	ON	325	19	Source
New Liskeard	ON	85.6	5
New Lowell	ON	50	2.9	Source
New Toronto	ON	121 - 142	7 - 8.3
Newmarket	ON	142	8.3	Source
New Sarum	ON	120	7
Niagara Falls	ON	121	7.1	Source
Nobleton	ON	241	14.1	Source
Norland	ON	25	1.5
Norman	ON	120	7
North Bay	ON	12 - 21	0.7 - 1.2
North York Twsp.	ON	121 - 142	7 - 8.3
Norwich	ON	256	18
Oakville	ON	121	8.5
Omemee	ON	273	16
Orangeville	ON	325	19	Source
Orillia	ON	90.4 - 300.8	5.3 - 17.6
Orono	ON	309	18.1	Source
Oshawa	ON	125	7.3
Ottawa	ON	30	1.8	Source
Owen Sound	ON	96	5.6
Paisley	ON	350	20 - 21
Paris	ON	684	37 - 43	Source
Parkhill	ON	115	6.7
Parry Sound	ON	35 - 60	2 - 3.5
Pembroke	ON	20 - 32	1.2 - 1.9
Penetanguishene	ON	167 - 250	9.8 - 14.6
Perth	ON	80 - 100	4.7 - 5.8
Peterborough	ON	91	5.3
Pickering	ON	137	8.0
Picton	ON	125	7.3
Pinewood	ON	149	9
Pleasant Point	ON	315	18
Point Clark	ON	308	18	Source
Port Arthur	ON	30 - 60	1.8 - 3.5
Port Colborne	ON	119	7	Source
Port Dover	ON	134.3	7.9	Source
Port Elgin	ON	107	6.3
Port Hope	ON	115 - 121	6.7 - 7
Port Perry	ON	274	16	Source
Port Rowan	ON	134.3	7.9	Source
Port Stanley	ON	120	7
Prescott	ON	120	7
Preston	ON	325	19
Princeton	ON	359	21
Queensville	ON	167	9.8	Source
Quinte West	ON	115	6.7
Renfrew	ON	40	2.3
Richmond (King's Park)	ON	350	20.5	Source
Richmond Hill	ON	128	7.5	Source
Ridgetown	ON	110	6.4
Ripley	ON	212	12.4	Source
Rockwood	ON	480	28	Source
Rodney	ON	132	7.7
Roseville	ON	274	16	Source
Sarnia	ON	95	5.6
Sault Ste. Marie	ON	40	2.3
Scarborough	ON	121 - 142	7 - 8.3
Schomberg	ON	280	16.4	Source
Scott Point	ON	1400	81.9	Source
Seaforth	ON	320	18.7
Sharon	ON	175	10.2
Shelburne	ON	350	19
Shingletown	ON	359	21	Source
Simcoe	ON	294	17.2	Source
Smith Falls	ON	65	3.8
Sonya	ON	320	19
Southview Estates	ON	75	4.4
Sparta	ON	120	7
St. Agatha	ON	359	21	Source
St. Catharines	ON	124	7.3	Source
St. Clements	ON	342	20	Source
St. George	ON	376	22	Source
St. Jacobs	ON	325	19	Source
St. Marys	ON	500	30
Stayner	ON	274	16	Source
Stouffville/Whitchurch	ON	320	18.7	Source
St. Thomas	ON	210	12.3
Stratford	ON	600	35
Strathroy	ON	102	6
Stroud	ON	130	7.6	Source
Sturgeon Falls	ON	52.4	3
Sudbury	ON	80 - 100	4.7 - 5.8
Sunderland	ON	345	20.2	Source
Tavistock	ON	308	22
Tecumseh	ON	32 - 140	1.9 - 8.2
Teeswater	ON	291	16 - 18
Thamesford	ON	564	33
Thorndale	ON	288	16.8	Source
Thornhill	ON	132	7.7
Thorold	ON	124	7.3	Source
Thunder Bay	ON	45 - 50	2.6 - 3
Tillsonburg	ON	84 - 360	6 - 25
Timmins	ON	45	2.6
Tiverton	ON	500	29.2	Source
Toronto	ON	117	6.8	Source
Tottenham (more info here)	ON	180	10.5
Trenton	ON	115	6.7
Underwood	ON	200	11.7	Source
Union	ON	120	7
Uxbridge	ON	186	10.9	Source
Vaughan	ON	127	7.4	Source
Vars	ON	200	11.7	Source
Victoria Place	ON	264	15
Walkerton	ON	359 - 393	21 - 23
Wallaceburg	ON	110	6.4
Wallacetown	ON	132	7.7
Wasaga Beach	ON	177	10.4
Waterloo (click for more info)	ON	291 - 650	17 - 38	Source
Waterford	ON	216	12.6	Source
Welland	ON	122	7.1	Source
West Gwillimbury	ON	131.7 - 155.6	7.7 - 9.1	Source
West Lorne	ON	132	7.7
Wellesley	ON	257	15	Source
West Montrose	ON	479	28	Source
Western Trent	ON	280	16
Weston	ON	121 - 142	7 - 8.3
Wheatley	ON	120	7.0
Whitby	ON	137	9.6
Whites	ON	120	7
Windsor	ON	95 - 120	5.6 - 7.0
Woodbridge	ON	123	8.63
Woodfield	ON	202	12
Woodroffe	ON	30	1.8
Woodstock	ON	427	25.0	Source
Woodville	ON	281	16
Yarmouth Centre	ON	120	7