2018—Subsec. (a)(6), (7). Pub. L. 115–270, § 2010(b)(1), added par. (6) and redesignated former par. (6) as (7). Subsec. (b)(1). Pub. L. 115–270, § 2010(b)(2), struck out “of paragraphs (1), (2), (3), and (4)” after “the requirements”. 1996—Subsec. (a)(1). Pub. L. 104–182, § 112(a)(1), amended par. (1) generally. Prior to amendment, par. (1) read as follows: “has adopted drinking water
in effect under
section 300g–1(a) and 300g–1(b) of this title;”. Subsec. (a)(5). Pub. L. 104–182, § 112(b), inserted “including earthquakes, floods, hurricanes, and other natural disasters, as appropriate” after “emergency circumstances”. Subsec. (a)(6). Pub. L. 104–182, § 113(b), added par. (6). Subsec. (c). Pub. L. 104–182, § 112(a)(2), added subsec. (c). 1986—Subsec. (a)(1). Pub. L. 99–339 substituted “are no less stringent than the national primary drinking water
in effect under
section 300g–1(a) and 300g–1(b) of this title” for subpars. (A) and (B) which related to stringency of State drinking water
.