By OpenStats · Built from official Canadian sources
Regional estimateWater quality grade
Good
Graded against Health Canada drinking water guidelines
Niagara-on-the-Lake at 225 mg/L is hard enough to scale kettles, but most residents solve taste and lead at the tap first. Carbon filtration + test strips; whole-house softener only if repeat hardness readings justify it.
OpenStats pick for Niagara-on-the-Lake’s 225 mg/L hardness — drinking-water carbon first; pitchers do not soften
Higher-flow kitchen carbon for Niagara-on-the-Lake without dedicating a softener closet
Niagara-on-the-Lake at 225 mg/L — measure before jumping to a whole-house softener
Consider whole-house softening only if strips confirm 225 mg/L+ is wrecking appliances
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Municipal reports cover the plant. A Tap Score kit tests the water at a Niagara-on-the-Lake tap for a broader contaminant panel.
Lab kit partner link. We may earn a commission when tracking is active.
Under-sink and RO systems from Waterdrop Canada — a direct brand alternative to marketplace filters.
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Niagara-on-the-Lake's drinking water earns Grade B (Good). Hardness is 225 mg/L (very hard), and pH is 6.8 against Health Canada's 6.5–8.5 guideline.
Lead at 0.1 μg/L is below the 5 μg/L maximum, and fluoride is 0.5 mg/L against a guideline of ≤ 1.5 mg/L.
How to use this page: read the headline metric and provincial comparison first, then supply and treatment notes, then the source footer for the underlying dataset.
Watershed to tap
How Niagara-on-the-Lake draws, treats, and distributes drinking water, from municipal and utility publications. Chemistry grades above come from separate parameter records; this section does not invent plant lab figures.
Surface water
Research confidence: medium
Niagara-on-the-Lake Water Treatment Plant
From municipal open data or regional estimate (verify locally).
Health parameters meet Health Canada limits; turbidity above the 1 NTU typical target and very hard water.
Health parameters meet Health Canada limits; turbidity exceeds the typical 1 NTU aesthetic target.
Figure 1 · Supply chain
From watershed to tap
Ontario · 123 cities in sample
Provincial average: hardness 178 mg/L · pH 7.5 · lead 0.4 μg/L · fluoride 0.6 mg/L
| Parameter | Reading | Health Canada guideline | Status |
|---|---|---|---|
| Hardness | 225 mg/L | No health limit (aesthetic) | Compliant |
| pH | 6.8 | 6.5–8.5 | Compliant |
| Lead | 0.1 μg/L | ≤ 5 μg/L | Compliant |
| Fluoride | 0.5 mg/L | ≤ 1.5 mg/L | Compliant |
| Chlorine (free) | 0.6 mg/L | ≤ 4 mg/L | Compliant |
| Turbidity | 2.6 NTU | ≤ 1 NTU (typical target) | Exceeds guideline |
On a private well or holding an Alberta water allocation licence? Water Register maps EPA licence records, transfer comparables, and watershed context across the province.
Explore WaterRegister.ca →OpenStats pick
Niagara-on-the-Lake at 225 mg/L is hard enough to scale kettles, but most residents solve taste and lead at the tap first. Carbon filtration + test strips; whole-house softener only if repeat hardness readings justify it.
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