No hazardous waste may be disposed of by underground injection—
(1)into a formation which contains (within one-quarter mile of the well used for such underground injection) an underground source of drinking water; or
(2)above such a formation.
The prohibitions established under this section shall take effect 6 months after November 8, 1984, except in the case of any State in which identical or more stringent prohibitions are in effect before such date under the Safe Drinking Water Act [42 U.S.C. 300f et seq.].
(b) Actions under Comprehensive Environmental Response, Compensation, and Liability Act
Subsection (a) of this section shall not apply to the injection of contaminated ground water into the aquifer from which it was withdrawn, if—
(1)such injection is—
(A)a response action taken under section
9606 of this title, or
(B)part of corrective action required under this chapter 
intended to clean up such contamination;
(2)such contaminated ground water is treated to substantially reduce hazardous constituents prior to such injection; and
(3)such response action or corrective action will, upon completion, be sufficient to protect human health and the environment.
In addition to enforcement under the provisions of this chapter, the prohibitions established under paragraphs (1) and (2) of subsection (a) of this section shall be enforceable under the Safe Drinking Water Act [42 U.S.C. 300f et seq.] in any State—
(1)which has adopted identical or more stringent prohibitions under part C of the Safe Drinking Water Act [42 U.S.C. 300h et seq.] and which has assumed primary enforcement responsibility under that Act for enforcement of such prohibitions; or
(2)in which the Administrator has adopted identical or more stringent prohibitions under the Safe Drinking Water Act [42 U.S.C. 300f et seq.] and is exercising primary enforcement responsibility under that Act for enforcement of such prohibitions.
The terms “primary enforcement responsibility”, “underground source of drinking water”, “formation” and “well” have the same meanings as provided in regulations of the Administrator under the Safe Drinking Water Act [42 U.S.C. 300f et seq.]. The term “Safe Drinking Water Act” means title XIV of the Public Health Service Act.
 So in original. Probably should be followed by a comma.
Title XIV of the Public Health Service Act, referred to in subsec. (d), is title XIV of act July 1, 1944, as added Dec. 16, 1974, Pub. L. 93–523, § 2(a),
88 Stat. 1660, as amended, known as the Safe Drinking Water Act, which is classified generally to subchapter XII (§ 300f et seq.) of chapter
6A of this title. Part C of the Act is classified generally to part C (§ 300h et seq.) of subchapter
XII of chapter
6A of this title. For complete classification of this Act to the Code, see Short Title note set out under section
201 of this title and Tables.
Section was formerly classified to section
6979a of this title, prior to renumbering by Pub. L. 99–339.
1986—Subsec. (c). Pub. L. 99–339, § 201(c)(1), substituted “enforcement under the provisions of this chapter” for “enforcement under sections
6973 of this title”.
The table below lists the classification updates, since Jan. 3, 2012, for this section. Updates to a broader range of sections may be found at the update page for containing chapter, title, etc.
The most recent Classification Table update that we have noticed was Tuesday, August 13, 2013
An empty table indicates that we see no relevant changes listed in the classification tables. If you suspect that our system may be missing something, please double-check with the Office of the Law Revision Counsel.