How can I find recorded pits, quarries and petroleum wells near a London home?
Two provincial records: the Find Pits and Quarries map of licensed and permitted aggregate sites, and the petroleum wells dataset of wells drilled for oil, gas, salt or underground storage.
Sources checked October 28, 2026
- The recordPits, quarries and petroleum wells
- Where to read itFind Pits and Quarries; Petroleum wells dataset
- The free check reads itPick “Past land use nearby”
What the record shows
The Province's Find Pits and Quarries map shows every licence, aggregate permit and wayside permit under the Aggregate Resources Act, with the licensee's name, the type of operation, the size of the licensed area and the maximum annual tonnage, and it can count the sites in a municipality or near a point you choose. The Province notes that a licensed site may not be extracting if there is no market demand, and that a pit or quarry approved recently can take time to appear on the map.
The petroleum wells dataset records wells drilled for oil or gas, for salt, or for storing hydrocarbons underground, kept in the Ontario Petroleum Data System. Both are records of what was licensed or drilled, not a history of every use of a piece of land: a blank result is not proof that land in London was never a pit, a dump or a factory site.
Where to read it yourself
- Find Pits and Quarries: the Province's map of aggregate licences and permits
- Petroleum wells dataset: well locations, on the Ontario Data Catalogue
What OfferDue covers in London
Past land use nearby runs for any Ontario address. The free check measures the distance to the nearest mapped aggregate site and petroleum well on the spot. The full report adds waste management sites and federal contaminated sites to the same group. None of it is a soil test or an environmental site assessment.
Free check: pick “Past land use nearby” See the sample report
Public-record information, not legal, financial, insurance or inspection advice. Records change and can be incomplete, and this page describes the records, not any particular home. What we cover, city by city.