Many residential wells in Umatilla and Morrow counties tap into an aquifer contaminated with nitrates, a potentially harmful byproduct of agricultural activity. The Oregon Health Authority has now mapped out the results of recent testing on some of those wells. Read more: https://www.kgw.com/article/tech/science/environment/oregon-contaminated-wells-nitrates-map-lower-umatilla-basin-tainted-waters/283-db47338c-6bf7-480a-ad86-afc1bb89497d Watch more The Story videos: http://bit.ly/watchTheStory Follow The Story on Twitter: https://twitter.com/TheStoryKGW Follow The Story on Instagram: https://instagram.com/thestorykgw