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This dataset provides information submitted by well contractors as prescribed by Regulation 903, and is stored in the Water Well Information System (WWIS). Spatial information for all of the well records reported in Ontario are also provided. Well record map *[WWIS]: Water Well Information System This data is related to: * Well records * Map: Well records * Topic: Drinking water * Law: Reg. 903: Wells
Related data: * Petroleum wells
Ministry contact: wellshelpdesk@ontario.ca
Geographic coverage Ontario Last Validated Date July 25, 2025 Update frequency Quarterly
Learn more about accessing data using different formats. Date range: January 1, 1899 - August 31, 2025 * ZIP WWIS - Microsoft Access English Last Updated: August 27, 2025 Explore * SHP WWIS - GIS Shapefile English Last Updated: August 27, 2025 Explore * ZIP Well Record Data Report English Last Updated: August 27, 2025 Explore
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