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Regulations last checked for updates: Apr 30, 2025
Title 40 - Protection of Environment last revised: Nov 30, 2025
All Titles
Title 40
Chapter I
Part 141
Subpart V - Subpart V—Stage 2 Disinfection Byproducts Requirements
§ 141.620 - General requirements.
§ 141.621 - Routine monitoring.
§ 141.622 - Subpart V monitoring plan.
§ 141.623 - Reduced monitoring.
§ 141.624 - Additional requirements for consecutive systems.
§ 141.625 - Conditions requiring increased monitoring.
§ 141.626 - Operational evaluation levels.
§ 141.627 - Requirements for remaining on reduced TTHM and HAA5 monitoring based on subpart L results.
§ 141.628 - Requirements for remaining on increased TTHM and HAA5 monitoring based on subpart L results.
§ 141.629 - Reporting and recordkeeping requirements.
authority:
42 U.S.C. 300f
,
300g
,
300g
,
300g
,
300g
,
300g
,
300g
,
300j
,
300j
,
and
source:
40 FR 59570, Dec. 24, 1975, unless otherwise noted.
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