My partners mother is from this area. She is nearly 70, so definitely in the impacted timeframe. According to her over half the people who attended a nearby elementary school died of cancer before 50. This incident has been public knowledge for several decades now.
Fours Corners and Durango too. Multiple generations of families dying prematurely from horrific cancers and very little coverage.
I'm half expecting RFK Jr. to make a show of swimming in the creek to show that there's no danger ...