"Various pockets" seems to imply the problem is not that wide spread. But it is: [1] https://www.theguardian.com/us-news/2021/mar/31/americas-tap-water-samples

"Various pockets" seems to imply the problem is not that wide spread. But it is: [1] https://www.theguardian.com/us-news/2021/mar/31/americas-tap-water-samples-forever-chemicals https://www.theguardian.com/us-news/2021/mar/31/americas-tap... [2] https://www.publichealth.columbia.edu/public-health-now/news/uranium-detectable-two-thirds-us-community-water-system-monitoring-records https://www.publichealth.columbia.edu/public-health-now/news...