Hi Chris, The quick answer to ...

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Hi Chris, The quick answer to your question is very much so. Here in the UK we use GIS mapping as part of the Drinking Water Safety Plan process for the catchment risk assessments. Much is on a 2D basis for land use and potential routes of travel for the individual catchment profiles. However I have used a 3D mapping for a particularly challenging chemical issue. Recommend you focus on the 50 and 400 day travel zones of each sources to highlight any activities which can alert to microbial and chemical risks.