eCFR Reference Browser

---

title: "40 CFR §142.21"

source: "https://www.ecfr.gov/current/title-40/section-142.21"

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: "C"

subpart_subject: "Review of State-Issued Variances and Exemptions"

section_number: "142.21"

section_subject: "State consideration of a variance or exemption request."

cfr_reference: "40 CFR 142.21"

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"

---

A State with primary enforcement responsibility shall act on any variance or exemption request submitted to it, within 90 days of receipt of the request.

§142.21 - State consideration of a variance or exemption request.