; and (B) keep each such request on file; and (3) in developing such inventory, take measures to minimize any disturbance to service lines that might release contaminants. (f) Service line ownership A public water system shall collect, maintain, and beginning not later than 3 years after the date of enactment of the National Opportunity for Lead Exposure Accountability and Deterrence Act of 2017 make publicly available all legal documents establishing the ownership of service lines at residential and nonresidential facilities. (g) Definitions In this section: (1) The term high-risk buildings means— (A) residential and nonresidential facilities with lead service lines— (i) that have galvanized pipes; (ii) that have low water use; or (iii) whose lead service lines are among the longest served by the public water system; and (B) residential facilities at which one or more pregnant women or children reside or where in-home childcare occurs. (2) The term lead service line means a pipe and its fittings, which are not lead free (as defined under section 1417 of the Safe Drinking Water Act ( 42 U.S.C. 300g–6 )), that connect the drinking water main to the building inlet. (3) The term publicly available means that a report is— (A) written in plain language that is culturally and linguistically appropriate; and (B) (i) published on a publicly accessible website of the public water system; or (ii) with respect to any person who is served by the system and gives notice to the system of not having access to a publicly available website, distributed by carrier route. . 3. To lower the action level for lead in drinking water Section 1412(b) of the Safe Drinking Water Act ( 42 U.S.C. 300g–1(b) ) is amended by adding at the end the following new paragraph: (16) Lead in drinking water The Administrator shall revise the national primary drinking water regulation for lead to ensure that— (A) not later than December 31, 2020, the action level for lead in drinking water is not more than 10 parts per billion