Why Well Records Matter in Renfrew County
The majority of rural properties in Renfrew County rely on private drilled wells for their water supply. Unlike municipal water systems, private wells are the homeowner's sole responsibility — maintenance, testing, and eventual replacement all fall to you. Understanding your well's history before you buy, and monitoring it once you own the property, is one of the most important things a rural homeowner can do.
Renfrew County sits largely on Canadian Shield bedrock — granite and gneiss formations that are ancient, durable, and largely impermeable except along fracture zones. Wells here are almost exclusively drilled (as opposed to dug or bored), typically ranging from 100 to 300 feet in depth. Yields vary significantly depending on which fracture zones the driller intercepted. A neighbour's well at 150 feet with 10 gallons per minute tells you almost nothing about what you'll encounter on an adjacent lot — local geology is that variable.
The Ontario Well Registry is the provincial database of drilled well records. It contains records submitted by licensed well drillers going back decades, and searching it costs nothing. For any rural property transaction or any new well project, it's your first stop.
What the Ontario Well Registry Contains
When a licensed driller completes a well in Ontario, they are required by law to submit a Well Record (Form 2) to the Ministry of the Environment, Conservation and Parks (MECP). The Well Registry consolidates these records into a searchable database.
A typical well record includes:
- Well location — Township, lot, concession or geographic coordinates
- Total depth — How deep the well was drilled
- Casing depth and diameter — The steel casing that lines the upper portion of the well to prevent surface contamination and collapse
- Water-bearing zones — The depths at which water was encountered during drilling, which fracture or formation it came from
- Static water level — The level at which water naturally sits in the well when not being pumped
- Pumping yield — The flow rate during the driller's pump test, usually expressed in gallons per minute (GPM) or litres per minute (LPM)
- Driller name and licence number
- Date drilled
- Well use — Domestic, agricultural, commercial, etc.
- Grouting and sealing details
Not every historical well has a record — submission requirements were less rigorously enforced in earlier decades, and some older wells predate the registry entirely. However, wells drilled since the 1980s generally have records on file.
How to Search the Registry
Go to ontario.ca/page/well-records and follow the link to the Well Record Search tool (operated through the Ontario government's geospatial services).
You can search by:
- Municipal address — Useful if you know the civic address of the property
- Geographic coordinates — Latitude and longitude (useful for rural properties without a standard address or when searching a specific area)
- Township/lot/concession — The traditional Ontario land survey system, still used in rural areas
Results appear as a map with pins representing individual well records. Click a pin to view the full well record details. You can typically download a PDF of the record.
Interpreting What You Find
Once you have a well record, here's what to focus on:
- Yield (GPM) — For a single-family home, you generally want a minimum of 1–2 GPM sustained yield. Anything below 0.5 GPM is marginal and may require a storage tank system. Yields of 5+ GPM are considered very good for residential use in Shield geology.
- Static water level — Shallow static levels (close to surface) can indicate a water table well rather than a fracture-fed well, which may be more vulnerable to drought and contamination.
- Casing depth — Deeper casing provides better protection from surface contamination. Ontario regulations require minimum 6 metres of surface casing in most situations.
- Age of the well — Wells drilled 30+ years ago may have aging pumps, pressure tanks, and potentially galvanized or lead-soldered components that warrant inspection.
Well Setback Requirements in Ontario
Ontario's Wells Regulation (O. Reg. 903) establishes minimum setback distances between wells and potential sources of contamination. These setbacks apply when drilling a new well:
- 15 metres from a septic tank or holding tank
- 15 metres from a leaching bed (septic field)
- 15 metres from a property line (where other contamination sources may exist)
- 30 metres from a fuel storage tank, livestock yard, or landfill
- 100 metres from certain high-risk contamination sources
Your municipality may have additional setback requirements beyond the provincial minimum. Always confirm with your local building department and a licensed well driller before siting a new well. See our Well Drilling in Renfrew County guide for full detail on the drilling process.
Water Quality Testing
A well record tells you the physical characteristics of the well — it tells you nothing about current water quality. Ontario does not require ongoing mandatory water testing for private wells (beyond point-of-sale disclosure requirements in real estate transactions), but the Ministry of the Environment, Conservation and Parks strongly recommends:
- Annually: Test for total coliform bacteria and E. coli. These indicate whether surface contamination is reaching your well — a serious health risk.
- Annually: Test for nitrates. Elevated nitrates indicate agricultural runoff or septic system influence and are particularly dangerous for infants.
- Every 3–5 years: Full suite including hardness, iron, manganese, sodium, sulphates, pH, turbidity. Many Renfrew County wells have elevated iron and manganese from Shield geology — not a health risk, but causes staining and affects taste.
- After any flooding, repairs, or known contamination event: Test immediately before resuming use.
The Renfrew County and District Health Unit provides subsidized water testing for private well owners. Contact them directly for current program details and sample bottle collection instructions. Results from accredited labs are required — do not rely on home test kits for health decisions.