Around 61 percent of drinking water service lines in small systems (those serving 3,300 or fewer people) across the United States were lead- and galvanized free service lines as of 2021. Nonetheless, almost 37 percent of such lines had an unknown status. When it comes to medium and large drinking water systems, the level of uncertainty grows. Around 56 percent of service lines in an average state sample were unknown. In that hypothetical example state, only 2.5 percent of lines were confirmed to be made out of lead.
Distribution of the service line network materials of the drinking water sector in the United States in 2021, by size of system
A sample of drinking water systems were selected to participate in the 7th DWINSA that included all large systems (those serving more than 100,000 people), a random sample of medium systems (those serving 3,301 to 100,000 people) for each state, and a national random sample of small systems (those serving 3,300 or fewer people).
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Environmental Protection Agency. (September 29, 2023). Distribution of the service line network materials of the drinking water sector in the United States in 2021, by size of system [Graph]. In Statista. Retrieved November 23, 2024, from https://www.statista.com/statistics/1499405/drinking-water-service-lines-network-usa-by-type/
Environmental Protection Agency. "Distribution of the service line network materials of the drinking water sector in the United States in 2021, by size of system." Chart. September 29, 2023. Statista. Accessed November 23, 2024. https://www.statista.com/statistics/1499405/drinking-water-service-lines-network-usa-by-type/
Environmental Protection Agency. (2023). Distribution of the service line network materials of the drinking water sector in the United States in 2021, by size of system. Statista. Statista Inc.. Accessed: November 23, 2024. https://www.statista.com/statistics/1499405/drinking-water-service-lines-network-usa-by-type/
Environmental Protection Agency. "Distribution of The Service Line Network Materials of The Drinking Water Sector in The United States in 2021, by Size of System." Statista, Statista Inc., 29 Sep 2023, https://www.statista.com/statistics/1499405/drinking-water-service-lines-network-usa-by-type/
Environmental Protection Agency, Distribution of the service line network materials of the drinking water sector in the United States in 2021, by size of system Statista, https://www.statista.com/statistics/1499405/drinking-water-service-lines-network-usa-by-type/ (last visited November 23, 2024)
Distribution of the service line network materials of the drinking water sector in the United States in 2021, by size of system [Graph], Environmental Protection Agency, September 29, 2023. [Online]. Available: https://www.statista.com/statistics/1499405/drinking-water-service-lines-network-usa-by-type/
