eCFR Reference Browser

---

title: "40 CFR §141.501"

source: "https://www.ecfr.gov/current/title-40/section-141.501"

title_number: "40"

volume_number: "25"

chapter_number: "Unknown"

subchapter_code: "D"

subchapter_subject: "WATER PROGRAMS (CONTINUED)"

part_code: "141"

part_subject: "NATIONAL PRIMARY DRINKING WATER REGULATIONS"

subpart_code: "T"

subpart_subject: "Enhanced Filtration and Disinfection—Systems Serving Fewer Than 10,000 People"

section_number: "141.501"

section_subject: "Who is subject to the requirements of subpart T?"

cfr_reference: "40 CFR 141.501"

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"

---

You are subject to these requirements if your system:

(a)Is a public water system;

(b)Uses surface water or GWUDI as a source; and

(c)Serves fewer than 10,000 persons.

§141.501 - Who is subject to the requirements of subpart T?