40 C.F.R. § 141.503
What does subpart T require?
Cite as 40 C.F.R. § 141.503 (2026)
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.
- Cross-references to the CFR
- 141.510141.520-141.522141.530-141.536141.540-141.544141.550-141.553141.560-141.564141.570