eCFR Reference Browser

---

title: "40 CFR §142.46"

source: "https://www.ecfr.gov/current/title-40/section-142.46"

title_number: "40"

volume_number: "25"

chapter_number: "Unknown"

subchapter_code: "D"

subchapter_subject: "WATER PROGRAMS (CONTINUED)"

part_code: "142"

part_subject: "NATIONAL PRIMARY DRINKING WATER REGULATIONS IMPLEMENTATION"

subpart_code: "E"

subpart_subject: "Variances Issued by the Administrator Under Section 1415(a) of the Act"

section_number: "142.46"

section_subject: "Alternative treatment techniques."

cfr_reference: "40 CFR 142.46"

title_name: "Title 40"

title_subject: "Protection of Environment"

parts_covered: "Parts 136 to 149"

revised_date: "Revised as of July 1, 2019"

publication_date: "As of July 1, 2019"

contains_description: "Containing a codification of documents of general applicability and future effect"

publication_info: "Published by the Office of the Federal Register National Archives and Records Administration as a Special Edition of the Federal Register"

---

The Administrator may grant a variance from any treatment technique requirement of a national primary drinking water regulation to a supplier of water, whether or not the public water system for which the variance is requested is located in a State which has primary enforcement responsibility, upon a showing from any person that an alternative treatment technique not included in such requirement is at least as efficient in lowering the level of the contaminant with respect to which such requirements was prescribed. A variance under this paragraph shall be conditioned on the use of the alternative treatment technique which is the basis of the variance.

§142.46 - Alternative treatment techniques.