reporter meghan hoyer co- wrote the story, "tainted at the tap," and joins me now from washington, d.c. how wide-ranging is this? is this every part of the country gee graphically, size of cities, big and small? >> it is. what we found were, we looked at roughly 77,000 water systems across the u.s and what we found was you know, the ones that had lead levels higher than the federal standard ranged, they were in almost every state, and they ranged from very small systems with 20 or 25 customers to very large systems. we saw cities and counties that served hundreds of thousands of people that had repeatedly brch over the limit. >> sreenivasan: and you also point to the fact that the notifications were different from town to town and how people felt like whether they really knew that there was a danger or not, differed. >> so when a system is over the federal lead limit, it has 60 days to put out a notification to its customers telling them there has been lead found in the water. what we found were those notifications were often written in a way that was confusing to customers, where cust