Well Water in Oxford County
A rural homeowner's guide to Lucas and Amherstburg limestone formations, extreme hardness, and water quality in Oxford.
Oxford County's High-Mineral Groundwater Landscape
Known as Canada’s Dairy Capital, Oxford County encompasses some of the most productive agricultural land in Ontario. Beyond urban serviced boundaries, thousands of farm properties, rural hamlets, and country homeowners rely on private drilled groundwater wells.
Geologically, Oxford County is famous among water treatment professionals for having some of the hardest well water in all of Ontario. The county sits atop the soluble Lucas and Amherstburg limestone formations. Groundwater dissolving these bedrock strata routinely reaches hardness levels of 30 to 45+ grains per gallon (GPG)—more than double the threshold for "very hard" water. Additionally, elevated dissolved iron and hydrogen sulfide gas (sulfur smell) are common throughout Norwich and Tillsonburg.
Select Your Oxford Community
Learn about well depths, common water symptoms, and screening options for your township:
Tillsonburg (Rural)
South OxfordProperties on the Oxford/Norfolk boundary. Extreme calcium hardness (30–45+ GPG), natural sulfur gas in drilled bedrock, and dissolved iron rust staining.
Ingersoll (Rural)
Thames Valley CoreSouth-West Oxford rural properties. Heavy dissolved calcium and magnesium creating thick crusty limescale on heating elements and plumbing fixtures.
Norwich
Agricultural EastRural township including Otterville and Burgessville. High dissolved iron (1–3+ ppm) causing heavy rust stains, severe water hardness, and sulfur odors.