Thousands of Oregonians in Umatilla and north Morrow counties rely on private wells for drinking water, tapping into a massive underground aquifer. But pollution has steadily contaminated that groundwater source in recent decades, turning what was once safe water into a potentially toxic supply. Read more: https://www.kgw.com/article/news/local/the-story/eastern-oregon-crisis-contaminated-well-water/283-f471a5f9-f8ec-448f-b606-d7eeb36e4653 A large share of those impacted are low-income people. Many do not speak English. They may not have political power, but they share a belief that the water has made them sick — even if they can't prove it. KGW's The Story traveled to eastern Oregon to speak with residents and learn more about the problem. Here are all four parts of the series that came about as a result, "Tainted Waters." Subscribe: https://www.youtube.com/c/KGWNews8 Watch the latest KGW newscast: https://www.kgw.com/watch Get the KGW app: https://kgw.com/appredirect