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Drinking Water Quality and Supply

Mount Pearl Drinking Water Quality

By OpenStats · Built from official Canadian sources

Direct municipal data
C

Water quality grade

Fair

Graded against Health Canada drinking water guidelines

Lead within guidelinepH in range
Hardness vs provincial average111 mg/L · prov. avg 171 mg/L
Lead vs provincial average0.7 μg/L · prov. avg 0.4 μg/L
Hardness
111 mg/L
Lead
0.7 μg/L
≤ 5 μg/L
pH
7.3999999999999995
6.5–8.5 range
Hardness
111 mg/L
Moderate
Lead
0.7 μg/L
Max: 5 μg/L
pH
7.4
6.5–8.5
Chlorine
1.2 mg/L
Max: 4 mg/L

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Reading this page

Mount Pearl's drinking water earns Grade C (Fair). Hardness is 111 mg/L (moderate), and pH is 7.4 against Health Canada's 6.5–8.5 guideline.

Lead at 0.7 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

Supply and treatment

How Mount Pearl 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.

Source type

Surface water

Research confidence: medium

Source waters

  • surface

Treatment plants

  • Mount Pearl Water Treatment Plant

    From municipal open data or regional estimate (verify locally).

Cited sources

Outbound municipal or utility citations pending. See methodology for how supply research is gathered.

Supply notes summarize published utility materials. They are not a substitute for the issuing authority's current notices or for a licensed tap test.

Health parameters meet Health Canada limits; turbidity above the 1 NTU typical target.

One or more parameters exceed a Health Canada drinking water guideline or turbidity target.

Figure 1 · Supply chain

From watershed to tap

Compared to provincial average

Newfoundland and Labrador · 15 cities in sample

Hardness (city vs Newfoundland and Labrador avg)111 mg/L
pH (city vs Newfoundland and Labrador avg)7.3999999999999995
Lead (city vs Newfoundland and Labrador avg)0.7 μg/L
Fluoride (city vs Newfoundland and Labrador avg)0.5 mg/L

Provincial average: hardness 171 mg/L · pH 7.6 · lead 0.4 μg/L · fluoride 0.6 mg/L

Full parameters

ParameterReadingHealth Canada guidelineStatus
Hardness111 mg/LNo health limit (aesthetic)Compliant
pH7.46.5–8.5Compliant
Lead0.7 μg/L≤ 5 μg/LCompliant
Fluoride0.5 mg/L≤ 1.5 mg/LCompliant
Chlorine (free)1.2 mg/L≤ 4 mg/LCompliant
Turbidity3.2 NTU≤ 1 NTU (typical target)Exceeds guideline
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Source · ECCC / municipal open data (seed). Last updated 2026-09-01. Refreshed on the site's automated schedule.