Les îLes-de-La-Madeleine Well Depths & Groundwater Data (260 Wells)

Bottom Line Up Front

In Les Îles-de-la-Madeleine the median well is 70 feet deep and draws from Sandstone Bedrock bedrock, which supplies 78.1% of wells here. Water is very hard at about 325 mg/L, so a softener is standard equipment. Rotary drilling is routine and 94% of wells serve ordinary household use. Treatment emphasis: dissolved silica, moderate mineral depth. Porous sandstone favors silica-rich mineral movement.

Modelled Well Depth

70 FT

Median for this area. Typical range 40–149 ft.

Est. Completion Cost

$7,220 CAD

$103/ft effective rate (includes fixed $1,900 mobilization & pump installation).

Water Hardness

325 MG/L

Very Hard. Dissolved silica, moderate mineral depth.

Pump class at this depth: 1/2 HP submersible, 4" casing

Adjust Target Depth

Drag the yellow indicator across the strata bar

Representative Geological StrataDrilling in: Bedrock (0–200 ft)

Bedrock

Shale

Other

40 ft (Shallow)Median 70 ft1039.0420347999711 ft (Deep)

Well Statistics

Local measurements compared against Quebec provincial benchmarks.

Hydrogeological Metric	Local Measurement	QC Provincial Benchmark
Total Registered Wells	260	1,420 avg per RM
Median Well Depth	70 ft	118 ft provincial median
Average Well Depth	123.2 ft	137.1 ft provincial average
Recorded Depth Range	4 – 1039 ft	2 – 1,201 ft recorded range
Dominant Aquifer	Sandstone Bedrock	Mixed glacial till province-wide
Estimated Water Hardness	325 mg/L — Very Hard	210 mg/L provincial average
Est. Drilling Cost Range	$6,610 – $17,260 CAD	$110/ft plus mobilization
Domestic Household Use	94% of wells	88% province-wide

Where This Report Applies

Approximate boundary of Les Îles-de-la-Madeleine

Shaded area is an approximate municipal outline for orientation only. Well records are aggregated across the entire Les Îles-de-la-Madeleine.

Depth Distribution

Most completed wells fall near the median depth of 70 ft.

0-50 ft

14.3% · 6

51-100 ft

35.7% · 15

101-150 ft

33.3% · 14

151-200 ft

11.9% · 5

201-250 ft

4.8% · 2

251-300 ft

0% · 0

301-400 ft

0% · 0

401+ ft

0% · 0

Median depth of 70 ft falls inside the reported range. Deeper completions here usually mean higher mineral content but steadier year-round pressure.

Aquifer Composition

Bedrock and drift aquifers recorded by drillers in this area.

Sand & Gravel Aquifer 78.1%

203 wells Shallow to intermediate glacial drift aquifer deposited in alluvial channels or outwash plains. Yields softer water but requires continuous sediment filtration and shallow bacterial monitoring.

Glacial Drift Silt & Till 11.9%

31 wells Low-permeability clay-rich glacial deposits with localized sand lenses. Often slow recharge.

Carbonate Rock (Limestone/Dolomite) 6.9%

18 wells Major regional bedrock aquifer formed by Ordovician/Silurian dolomite. Known for reliable, high-volume yields with elevated mineral hardness and dissolved calcium/magnesium carbonates.

Undifferentiated Aquifer 3.1%

8 wells Unclassified hydrogeological formation from legacy provincial drill records.

Water Quality Profile

Estimated hardness, mineral risks and treatment implications.

Total Hardness

Very Hard

325 MG/L

as CaCO3, Health Canada scale

Soft Moderate Hard Very hard

Present Mineral Risk

Scale build-up in kettles, heaters and fixtures
Dissolved iron and manganese staining
Elevated calcium and magnesium from Sandstone Bedrock bedrock

Test before purchasing treatment. Hardness varies well to well within the same quarter section.

Size custom treatment system for this water

Drilling Activity

Historical permit and construction activity by decade.

Pre-1970

0 wells on record

1970s

0 wells on record

1980s

0 wells on record

1990s

0 wells on record

2000s

2 wells · avg 60 ft

2010s

17 wells · avg 111 ft

2020s

23 wells · avg 93 ft

0% of wells are over 30 years old. Steel casing installed before 1995 can lose integrity, so any older well should get a casing inspection and a bacterial test before you rely on it.

Affiliate & Editorial Disclosure: In accordance with the Competition Bureau of Canada and FTC guidelines, please note that links to filtration equipment and test kits are affiliate links. If you purchase through our links, Canada Well Data may earn a commission at no extra cost to you. Recommendations are generated independently from regional well records and Health Canada GCDWQ standards. Learn more about our affiliate and editorial disclosure policy.

Data-Driven Prescription

The treatment system this water needs

Generated from 325 mg/L hardness, sandstone bedrock and a 70 ft median completion depth, for a four-person household. Adjust the assumptions in the builder.

Equipment Total

$4,578

Annual Consumables

$669

Softener Sizing

52,000 gr

01

Water Testing

Tap Score Canadian Essential Water Test

required

Nothing gets sized without numbers. Regional modelling puts hardness near 325 mg/L in sandstone bedrock, but your own well can sit well off that median.

Sizing: Accredited lab panel: hardness, iron, manganese, nitrate, arsenic, total coliform and E. coli
Equipment: $349 CAD
Annual Consumables: $349 CAD

Shop this stage Budget option · $39 Premium option · $499

02

Iron, Manganese & Sulfur

SpringWell WS1 Air-Injection Iron & Manganese Filter

recommended

Dissolved iron and manganese are the routine complaint on sandstone bedrock wells — they stain fixtures and foul softener resin if not removed first.

Sizing: Air-injection oxidation, chemical-free, ahead of the softener
Equipment: $1,990 CAD
Annual Consumables: $60 CAD

Shop this stage Budget option · $189 Premium option · $3,190

03

Whole-Home Softening

SpringWell SS1 48,000 Grain Whole-Home Softener

required

At 325 mg/L (very hard) a 4-person household loads roughly 5.7k grains of hardness per day onto the plumbing.

Sizing: 52,000 grain metered capacity — about a 7-day regeneration cycle with reserve
Equipment: $1,690 CAD
Annual Consumables: $140 CAD

Shop this stage

04

UV Disinfection

iSpring UVF55FS 12 GPM Whole-House UV Disinfection System

recommended

Median completion depth of 70 ft in sandstone bedrock leaves this aquifer surface-influenced, which is where coliform hits come from.

Sizing: 12 GPM UV, installed last in the treatment train, downstream of all filtration
Equipment: $549 CAD
Annual Consumables: $120 CAD

Shop this stage Premium option · $1,190

Tune this to my household

Featured Contractor Spot

Are you a licensed well driller serving Les Îles-de-la-Madeleine?

Claim your verified listing profile and be found by homeowners on this report.

Claim Local Listing

Property Due Diligence $39 CAD

Instant WellCheck™ Property Dossier

Buying rural acreage or a home in Les Îles-de-la-Madeleine? Get an automated 12-page comprehensive property report analyzing all adjacent well logs, lithology strata, aquifer vulnerability, pump test yields, and water hardness risks.

Generate Property Dossier ($39)

Planning to Drill?

Get three free drilling quotes

Matched to contractors who already drill in Les Îles-de-la-Madeleine. Compare casing sizes, depth guarantees, and mobilization fees.

Request Free Quotes

Frequently Asked Questions

Quick answers about water wells in Les Îles-de-la-Madeleine.

How deep are water wells in Les Îles-de-la-Madeleine?

The average water well in Les Îles-de-la-Madeleine, QC is 123.2 feet deep. Most wells range between 40.0 and 148.7 feet.

What is the primary aquifer in Les Îles-de-la-Madeleine?

The most common aquifer tapped by drillers in Les Îles-de-la-Madeleine is Sandstone Bedrock.