88 STAT. ]
PUBLIC LAW93-523-DEC. 16, 1974
" (3) The interim primary regulations first promulgated under paragraph (1) shall take effect eighteen months after the date of their promulgation. "(b)(1)(A) Within 10 days of the date the report on the study conducted pursuant to subsection (e) is submitted to Congress, the Administrator shall publish in the Federal Register, and provide opportunity for comment on, the— "(i) proposals in the report for recommended maximum contaminant levels for national primary drinking water regulations, and "(ii) list in the report of contaminants the levels of which in drinking water cannot be determined but which may have an adverse effect on the health of persons. " (B) Within 90 days after the date the Administrator makes the publication required by subparagraph (A), he shall by rule establish rocommended maximum contaminant levels for each contaminant which, in his judgment based on the report on the study conducted pursuant to subsection (e), may have any adverse effect on the health of persons. p]ach such recommended maximum contaminant level shall be set at a level at which, in the Administrator's judgment based on such report, no known or anticipated adverse eft'ects on the health of persons occur- and which allows an adequate margin of safety. In addition, he shall, on the basis of the report on the study conducted pursuant to subsection (e), list in the rules under this subparagraph any contaminant the lev'el of which cannot be accurately enough measured in drinking water to establish a reconnnended maximum cojitaminant level and which may have any ad\erse effect on the health of persons. Based on information available to him. the Administrator may by rule change reconnnended levels established under this subparagraph or change such list. "(2) On the date the Administrator establishes pursuant to paragraph (1)(B) recommended maxinmm contaminant levels he shall publish in the Federal Register proposed revised national pidmary drinking water regulations (meeting the requirements of paragraph (3)). Within 180 days after the date of such proposed regulations, he shall pronnilgate such revised drinking water regulations with such modifications as he deems appropriate. "(3) Revdsed national primary drinking water regulations promulgated under paragraph (2) of this subsection shall be primary drinking water regulations which specify a maximum contaminant level or require the use of treatment techniques for each contaminant for- which a recommended maximum contaminant level is established or which is listed in a rule under paragraph (1)(B). The maximum contaminant level specified in a revised national primary drinking water regulation for a contaminant shall be as close to the reconmiended maximum contaminant level established under paragraph (1)(B) for such contaminant as is feasible. A required treatment technique for a contaminant for which a recommended maximum contaminant level has been established under paragraph (1)(B) shall reduce such contaminant to a level which is as close to the recommended maximum contaminant level for such contaminant as is feasible. A required treatment technique for a contaminant which is listed under paragraph (1)(B) shall
1663
Publication in Federal R e g i s ter.
Recommended maximum contaminant l e v e l s.
P u b l i c a t i o n in Federal Register.
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