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: "141.503"
section_subject: "What does subpart T require?"
cfr_reference: "40 CFR 141.503"
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"
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There are seven requirements of this subpart, and you must comply with all requirements that are applicable to your system. These requirements are:
(a)You must cover any finished water reservoir that you began to construct on or after March 15, 2002 as described in §§ 141.510 and 141.511;
(b)If your system is an unfiltered system, you must comply with the updated watershed control requirements described in §§ 141.520-141.522;
(c)If your system is a community or non-transient non-community water systems you must develop a disinfection profile as described in §§ 141.530-141.536;
(d)If your system is considering making a significant change to its disinfection practices, you must develop a disinfection benchmark and consult with the State for approval of the change as described in §§ 141.540-141.544;
(e)If your system is a filtered system, you must comply with the combined filter effluent requirements as described in §§ 141.550-141.553;
(f)If your system is a filtered system that uses conventional or direct filtration, you must comply with the individual filter turbidity requirements as described in §§ 141.560-141.564; and
(g)You must comply with the applicable reporting and recordkeeping requirements as described in §§ 141.570 and 141.571.