This week on our environmental policy podcast Parts Per Billion we begin the first in a series on drinking water—specifically, how do we pay for the drinking water infrastructure upgrades the country badly needs? We pose that question to Rep. Paul Tonko (D-N.Y.), the top Democrat on a key environmental subcommittee in the House. He says without a big infusion of federal cash, incidents like the ongoing contamination crisis in Flint, Mich., could become commonplace.

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