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OpenStats picks for Comox — very hard water (276 mg/L)
Comox hardness is 276 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.
Comox tap water: Grade C, hardness 276 mg/L
By OpenStats · Built from official Canadian sources
Regional estimateC
Water quality grade
Fair
Graded against Health Canada drinking water guidelines
Lead within guidelinepH in range
Hardness vs provincial average276 mg/L · prov. avg 142 mg/L
Lead vs provincial average0.4 μg/L · prov. avg 0.4 μg/L
Hardness
276 mg/L
Lead
0.4 μg/L
≤ 5 μg/L
pH
6.9
6.5–8.5 range
Hardness
276 mg/L
Very hard
Lead
0.4 μg/L
Max: 5 μg/L
pH
6.9
6.5–8.5
Chlorine
0.9 mg/L
Max: 4 mg/L
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Aquasure Harmony 40,000 grain softener
OpenStats pick for Comox’s 276 mg/L hardness — metered whole-house softener sized for very hard Canadian tap water
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Waterdrop 15UB under-sink system + faucet
Comox: under-sink carbon for drinking water (chlorine 0.9 mg/L) — does not remove hardness minerals
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SR SUN RISE 20-stage shower filter
Comox’s 0.9 mg/L chlorine — bestselling shower filter on Amazon.ca
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VARIFY hardness test strips
Verify 276 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 Comox taps
Municipal reports cover the plant. A Tap Score kit tests the water at a Comox tap for a broader contaminant panel.
Lab kit partner link. We may earn a commission when tracking is active.
Reading this page
Comox's drinking water earns Grade C (Fair). Hardness is 276 mg/L (very hard), and pH is 6.9 against Health Canada's 6.5–8.5 guideline.
Lead at 0.4 μg/L is below the 5 μg/L maximum, and fluoride is 0.6 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 Comox 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
Groundwater
Research confidence: medium
Source waters
- groundwater
Treatment plants
Comox 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.
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
British Columbia · 58 cities in sample
Hardness (city vs British Columbia avg)276 mg/L
pH (city vs British Columbia avg)6.9
Lead (city vs British Columbia avg)0.4 μg/L
Fluoride (city vs British Columbia avg)0.6 mg/L
Provincial average: hardness 142 mg/L · pH 7.6 · lead 0.4 μg/L · fluoride 0.6 mg/L
Full parameters
| Parameter | Reading | Health Canada guideline | Status |
|---|---|---|---|
| Hardness | 276 mg/L | No health limit (aesthetic) | Compliant |
| pH | 6.9 | 6.5–8.5 | Compliant |
| Lead | 0.4 μg/L | ≤ 5 μg/L | Compliant |
| Fluoride | 0.6 mg/L | ≤ 1.5 mg/L | Compliant |
| Chlorine (free) | 0.9 mg/L | ≤ 4 mg/L | Compliant |
| Turbidity | 3.7 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 Comox — very hard water (276 mg/L)
Comox hardness is 276 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 Comox’s 276 mg/L hardness — metered whole-house softener sized for very hard Canadian tap water
- Shop on Amazon.caWaterdrop 15UB under-sink system + faucetComox: under-sink carbon for drinking water (chlorine 0.9 mg/L) — does not remove hardness minerals
- Shop on Amazon.caSR SUN RISE 20-stage shower filterComox’s 0.9 mg/L chlorine — bestselling shower filter on Amazon.ca
- Shop on Amazon.caVARIFY hardness test stripsVerify 276 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.