Conservation Ontario - Water Wednesdays September 29

GUDI means Groundwater Under the Direct Influence of surface water. Municipal wells where surface water influences the groundwater supply are classed as GUDI. Activities that occur near the closest water source – lake or river - are more likely to impact the quality of the well water. For example, an oil spill in these areas would have a negative effect on the water in GUDI wells. A wellhead protection area E is designated for these wells, and involve a 2-hour time of travel in closest surface water source. #SourceWaterON@ONenvironment