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OpenStats picks for Laval — very hard water (253 mg/L)
Laval hardness is 253 mg/L — pitcher filters improve taste but will not soften water. Size a metered whole-house softener for scale, and add under-sink carbon for drinking chlorine.
Laval tap water: Grade B, hardness 253 mg/L
By OpenStats · Built from official Canadian sources
Regional estimateB
Water quality grade
Good
Graded against Health Canada drinking water guidelines
Lead within guidelinepH in range
Hardness vs provincial average253 mg/L · prov. avg 183 mg/L
Lead vs provincial average0.5 μg/L · prov. avg 0.3 μg/L
Hardness
253 mg/L
Lead
0.5 μg/L
≤ 5 μg/L
pH
7.1
6.5–8.5 range
Hardness
253 mg/L
Very hard
Lead
0.5 μg/L
Max: 5 μg/L
pH
7.1
6.5–8.5
Chlorine
1 mg/L
Max: 4 mg/L
SponsoredAlso consider
Aquasure Harmony 40,000 grain softener
OpenStats pick for Laval’s 253 mg/L hardness — metered whole-house softener sized for very hard Canadian tap water
SponsoredAlso consider
Waterdrop 15UB under-sink system + faucet
Laval: under-sink carbon for drinking water (chlorine 1.0 mg/L) — does not remove hardness minerals
SponsoredAlso consider
SR SUN RISE 20-stage shower filter
Laval’s 1.0 mg/L chlorine — bestselling shower filter on Amazon.ca
SponsoredAlso consider
VARIFY hardness test strips
Verify 253 mg/L hardness at your tap before buying salt and sizing a softener
As an Amazon Associate, OpenStats earns from qualifying purchases.
Partner
Lab water test for Laval taps
Municipal reports cover the plant. A Tap Score kit tests the water at a Laval tap for a broader contaminant panel.
Lab kit partner link. We may earn a commission when tracking is active.
Reading this page
Laval's drinking water earns Grade B (Good). Hardness is 253 mg/L (very hard), and pH is 7.1 against Health Canada's 6.5–8.5 guideline.
Lead at 0.5 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 Laval 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 des Prairies
- Rivière des Mille-Îles
Treatment plants
Station de Chomedey
Largest Laval plant; draws from Rivière des Prairies; can backfeed other sectors in emergency.
Station de Pont-Viau
East/central plant on Rivière des Prairies corridor; major upgrades completed mid-2010s.
Station de Sainte-Rose
Northern plant on Rivière des Mille-Îles side of Île Jésus.
Distribution
Three production stations feed about 1,650 km of distribution mains. The network is meshed so plants primarily serve their sectors but can support each other if one plant is offline.
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
Compared to provincial average
Quebec · 34 cities in sample
Hardness (city vs Quebec avg)253 mg/L
pH (city vs Quebec avg)7.1
Lead (city vs Quebec avg)0.5 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
| Parameter | Reading | Health Canada guideline | Status |
|---|---|---|---|
| Hardness | 253 mg/L | No health limit (aesthetic) | Compliant |
| pH | 7.1 | 6.5–8.5 | Compliant |
| Lead | 0.5 μg/L | ≤ 5 μg/L | Compliant |
| Fluoride | 0.5 mg/L | ≤ 1.5 mg/L | Compliant |
| Chlorine (free) | 1 mg/L | ≤ 4 mg/L | Compliant |
| Turbidity | 1.4 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.
Explore WaterRegister.ca →OpenStats pick
OpenStats picks for Laval — very hard water (253 mg/L)
Laval hardness is 253 mg/L — pitcher filters improve taste but will not soften water. Size a metered whole-house softener for scale, and add under-sink carbon for drinking chlorine.
As an Amazon Associate, OpenStats earns from qualifying purchases.
· Compare options- Shop on Amazon.caAquasure Harmony 40,000 grain softenerOpenStats pick for Laval’s 253 mg/L hardness — metered whole-house softener sized for very hard Canadian tap water
- Shop on Amazon.caWaterdrop 15UB under-sink system + faucetLaval: under-sink carbon for drinking water (chlorine 1.0 mg/L) — does not remove hardness minerals
- Shop on Amazon.caSR SUN RISE 20-stage shower filterLaval’s 1.0 mg/L chlorine — bestselling shower filter on Amazon.ca
- Shop on Amazon.caVARIFY hardness test stripsVerify 253 mg/L hardness at your tap before buying salt and sizing a softener
- Shop on Amazon.caFleck 5600 SXT softener (alternate)Alternate Fleck 5600 SXT listing if Aquasure is out of stock
Source · ECCC / municipal open data (seed). Last updated 2026-09-01. Refreshed on the site's automated schedule.