Water Hardness Atlas ZIP / postcode

Tap water hardness in British Columbia

We have published hardness data for 35 cities in British Columbia. The median is 22 mg/L; the hardest water is in Vernon (173 mg/L), the softest in Nanaimo (12 mg/L).

9 % of these cities have hard or very hard water (over 120 mg/L).

Health Canada: hardness above 200 mg/L is considered poor but tolerable; above 500 mg/L unacceptable.

Each dot is a place with published data; colour shows the hardness band.

Cities in British Columbia, hardest first

mg/Lmg/L
Vernon173173hard
Fort St. John155155hard
Lake Country129129hard
Penticton110110moderately hard
Nanoose Bay9393moderately hard
Revelstoke7171moderately hard
West Kelowna6767moderately hard
Castlegar6565moderately hard
Summerland5555soft
Hope5454soft
Chilliwack5454soft
Whistler4949soft
Port Alberni4646soft
Gibsons4646soft
Kamloops4040soft
Campbell River2424soft
Delta2222soft
Squamish2222soft
Vancouver2222soft
Surrey2222soft
North Vancouver2121soft
Port Coquitlam2020soft
Port Moody2020soft
Victoria-Fraserview2020soft
View Royal1919soft
Comox1818soft
Courtenay1818soft
Sooke1818soft
Central Saanich1717soft
Colwood1717soft
Esquimalt1717soft
Langford1717soft
Oak Bay1717soft
Victoria1717soft
Nanaimo1212soft

All cities in Canada →