How Much Water Should Canadians Actually Drink Per Day?
Eight glasses a day is a rough guideline, not science. Here is what Canadian hydration research actually recommends — and how much of it comes from food.
Edited by the UnityLife editorial team
Written by UnityLife Admin
Updated April 2026 · Reviewed March 2026
Hydration advice is more myth than medicine. The “8 glasses a day” rule has no published origin, and your daily fluid needs depend on body size, climate, activity and how much water-rich food you eat.
What Health Canada recommends
Health Canada’s adequate intake (AI) for total water — from beverages AND food — is 3.7 L/day for adult men and 2.7 L/day for adult women. About 20% of that comes from food like fruit, vegetables and soup.
That translates to roughly 3 L of beverages for men and 2.2 L for women as a general target.
When to drink more
Hot weather, exercise, pregnancy and breastfeeding all raise needs. A good rule: urine pale yellow = hydrated; dark yellow = drink.
Does coffee count?
Yes. Coffee’s mild diuretic effect is more than offset by the water it contains. Moderate coffee intake counts toward your daily total.
The bottom line
Sip through the day, drink extra in heat or during exercise, and stop worrying about hitting an exact 8-glass target.
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The bottom line
Sip through the day, drink extra in heat or during exercise, and stop worrying about hitting an exact 8-glass target.
Frequently asked questions
Rare but real — hyponatraemia can occur with extreme intake in a short window, particularly during endurance sports.
Sources & further reading
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