Drinking Water Quality and Supply

Dolbeau-Mistassini tap water: Grade B, hardness 178 mg/L

By OpenStats · Built from official Canadian sources

Regional estimate
B

Water quality grade

Good

Graded against Health Canada drinking water guidelines

Lead within guidelinepH in range
Hardness vs provincial average178 mg/L · prov. avg 183 mg/L
Lead vs provincial average0.2 μg/L · prov. avg 0.3 μg/L
Hardness
178 mg/L
Lead
0.2 μg/L
≤ 5 μg/L
pH
7.1
6.5–8.5 range
Hardness
178 mg/L
Hard
Lead
0.2 μg/L
Max: 5 μg/L
pH
7.1
6.5–8.5
Chlorine
0.7 mg/L
Max: 4 mg/L
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Reading this page

Dolbeau-Mistassini's drinking water earns Grade B (Good). Hardness is 178 mg/L (hard), and pH is 7.1 against Health Canada's 6.5–8.5 guideline.

Lead at 0.2 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 Dolbeau-Mistassini 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: high

Source waters

  • Rivière Mistassini (sector intakes for Dolbeau and Mistassini)

Treatment plants

  • Usine Hamel (secteur Dolbeau)

    Filtration + chlorination plant from early 1970s; city seeking rebuild funding (~$19M) as facility ages out of standards.

  • Usine Sainte-Marie (secteur Mistassini)

    Filtration + chlorination for Mistassini sector per MELCC registry / city annual bilans.

Distribution

Two main production plants serve former Dolbeau and Mistassini sectors across the Mistassini River.

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

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

Figure 1 · Supply chain

From watershed to tap

Compared to provincial average

Quebec · 34 cities in sample

Hardness (city vs Quebec avg)178 mg/L
pH (city vs Quebec avg)7.1
Lead (city vs Quebec avg)0.2 μg/L
Fluoride (city vs Quebec avg)0.5 mg/L

Provincial average: hardness 183 mg/L · pH 7.5 · lead 0.3 μg/L · fluoride 0.6 mg/L

Full parameters

ParameterReadingHealth Canada guidelineStatus
Hardness178 mg/LNo health limit (aesthetic)Compliant
pH7.16.5–8.5Compliant
Lead0.2 μg/L≤ 5 μg/LCompliant
Fluoride0.5 mg/L≤ 1.5 mg/LCompliant
Chlorine (free)0.7 mg/L≤ 4 mg/LCompliant
Turbidity1.9 NTU≤ 1 NTU (typical target)Exceeds guideline
Alberta water licences

WaterRegister.ca

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.

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OpenStats pick

OpenStats picks for Dolbeau-Mistassini — moderate hardness

Dolbeau-Mistassini at 178 mg/L is hard enough for kettle scale but often below whole-house softener urgency. Carbon filtration for taste plus hardness strips before you overspend.

As an Amazon Associate, OpenStats earns from qualifying purchases.

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Source · ECCC / municipal open data (seed). Last updated 2026-09-01. Refreshed on the site's automated schedule.