The Walkerton Ontario groundwater contamination in May 2000 was entirely due to human operational errors and had nothing to do with geology or hydrogeology.

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The Walkerton Ontario groundwater contamination was primarily due to E. coli bacteria entering the water supply from runoff caused by heavy rainfall. While human operational errors, such as the failure to properly disinfect the water and to issue timely warnings to the public, significantly exacerbated the situation, the initial contamination was influenced by hydrogeological factors, including the way the town's wells were susceptible to contamination from surface water.

The Walkerton Ontario Groundwater Contamination in May 2000 Was Entirely