Regional groundwater summary • Ontario Historical Log Extraction
Bottom Line Up Front
In Renfrew, the median completed well is 139 ft deep.
A published hardness range for this place and aquifer is under 60 to above 180 mg/L as CaCO₃. That is a regional estimate, not a test of your well. Source: Estimate based on Health Canada hardness bands.
Most production draws from Crystalline Bedrock (about 59% of local wells).
These municipal aggregates support planning only — they do not replace an accredited laboratory potability test for your own well.
Interactive Well Depth & Modeled Typical Strata
Drag the indicator line or tap a stratum below to read the recorded depth range
Modelled Depth
139 FT
Area median
Drilling cost
$9,730–$20,850
Estimate
Published hardness
under 60 to above 180 mg/L as CaCO₃
Modeled typical strata — placeholder from median depth + aquifer type; not local driller logs.
Local measurements compared against Ontario provincial benchmarks.
| Hydrogeological Metric | From the registry or a cited study | ON Provincial Benchmark |
|---|---|---|
| Total Registered Wells | 20,687 | — |
| Median Well Depth | 139 ft | 103 ft provincial median |
| Average Well Depth | 155.4 ft | — |
| Dominant Aquifer | Crystalline Bedrock | — |
| Hardness | under 60 to above 180 mg/L as CaCO₃ — Estimate. Estimate based on Health Canada hardness bands | — |
| Drilling cost | $9,730–$20,850 — Estimate. Typical drilling prices in Canada, about $70–$150 per foot | — |
| Domestic Household Use | 92% of wells | — |
Approximate boundary of Renfrew
Shaded area is an approximate municipal outline for orientation only. Well records are aggregated across the entire Renfrew.
Most completed wells fall near the median depth of 139 ft. Recorded depths cover 20,623 wells.
Median depth of 139 ft falls inside the reported range. Deeper completions here usually mean higher mineral content but steadier year-round pressure.
Bedrock and drift aquifers recorded by drillers in this area. Recorded for 20,583 of these 20,687 wells.
12,179 of 20,687 Crystalline Canadian Shield rock. Yields soft, slightly acidic water with minimal dissolved solids, relying on secondary fracture networks for groundwater storage.
5,807 of 20,687 Major regional bedrock aquifer formed by Ordovician/Silurian dolomite. Known for reliable, high-volume yields with elevated mineral hardness and dissolved calcium/magnesium carbonates.
1,392 of 20,687 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.
678 of 20,687 Deep basal sandstone bedrock unit (including Winnipeg Formation). Supplies exceptionally stable yields; often exhibits moderate mineral hardness with silica-rich water.
255 of 20,687 Impermeable glaciolacustrine clay and silt deposits formed in ancient glacial lakes. Acts as an effective regional aquitard confining underlying aquifers.
245 of 20,687 Fractured sedimentary shale formation (including Odanah / Pierre members). Characterized by high total dissolved solids (TDS) and potential sulfur/iron compounds.
27 of 20,687 Unclassified hydrogeological formation from legacy provincial drill records.
2,893 holes found no usable water. test holes, observation or monitoring wells, dewatering wells, decommissioned wells, dry holes, no-aquifer holes, and other non-supply wells filtered out of the headline
A published hardness range, when one exists for this place and aquifer. Not a test of your well.
Measured nearby
Measured government tests within 25 km of Renfrew.
USGS (2018) bands reprinted by Health Canada. A range can cross more than one band. This is not a sample.
What this is not
Health Canada has not set a maximum acceptable concentration for hardness. A wide published range can sit in more than one USGS band.
ADMASTON/BROMLEY, RENFREW COUNTY, 3.33 km away, nearby.
4 government lab tests, dated 2017–2025.
Hardness 77–284 mg/L as CaCO₃, median 188.5.
Worked out by wellwaterguide.ca from 4 government lab tests.
reported hardness, or calculated from measured calcium and magnesium when hardness was not reported
Provincial Groundwater Monitoring Network (PGMN): water chemistry and well locations Open Government Licence - Ontario
BONNECHERE VALLEY, RENFREW COUNTY, 8.28 km away, nearby.
3 government lab tests, dated 2017–2025.
Hardness 293–500 mg/L as CaCO₃, median 333.
Worked out by wellwaterguide.ca from 3 government lab tests.
reported hardness, or calculated from measured calcium and magnesium when hardness was not reported
Provincial Groundwater Monitoring Network (PGMN): water chemistry and well locations Open Government Licence - Ontario
WHITEWATER REGION, RENFREW COUNTY, 20.95 km away, in the wider area.
4 government lab tests, dated 2017–2025.
Hardness 260–360 mg/L as CaCO₃, median 336.5.
Worked out by wellwaterguide.ca from 4 government lab tests.
reported hardness, or calculated from measured calcium and magnesium when hardness was not reported
Provincial Groundwater Monitoring Network (PGMN): water chemistry and well locations Open Government Licence - Ontario
1 well tested, range 169–209 mg/L.
11.75 km away, in the wider area.
Tests dated 2023–2025.
1 well tests above 180 mg/L.
Worked out by wellwaterguide.ca from 2 government lab tests.
reported hardness, or calculated from measured calcium and magnesium when hardness was not reported
Provincial Groundwater Monitoring Network (PGMN): water chemistry and well locations Open Government Licence - Ontario
Historical permit and construction activity by decade.
56% of dated wells are over 30 years old (pre-1995). Steel casing installed before 1995 can lose integrity over time. Any older well should get a casing inspection and a certified bacterial test before reliance.
Treatment
This page does not turn a hardness range or a well depth into an equipment total, a grain capacity, or a drilling price. Read the methodology, the filtration guide, and the products catalog.
Suggested system
Test kit
estimate, confirm with a lab testA test of your own well comes before any equipment. Test for coliform bacteria.
Water testingIron and manganese filter
estimate, confirm with a lab testManganese above the aesthetic objective, consider an iron/manganese filter. One monitoring well near this place has median manganese of 0.426 mg/L. Another has median manganese of 0.0461 mg/L.
Iron and manganese guideWater softener
estimate, confirm with a lab testA softener is likely needed. The nearest monitoring well has a median hardness of 188.5 mg/L as CaCO₃.
Hard-water guideBecause water wells in Renfrew average 139 ft into crystalline bedrock, contractors equipped with heavy rotary rigs and proper casing seals are recommended. Contact local drillers directly or request competitive bids.
Yard: Richmond, ON (101.9 km away)
Yard: Verona, ON (125.4 km away)
Yard: Fenelon Falls, ON (177.6 km away)
Yard: Barrie, ON (244.1 km away)
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Quick answers about water wells in Renfrew.
Among 20623 producing water wells with a recorded depth, the median is 138.5 ft (42.2 m).
Explore neighbouring hydrogeological formations and compare drilling depths