40 CFR 141.535 - What if my system uses chloramines, ozone, or chlorine dioxide for primary disinfection?

Regulations last checked for updates: Feb 09, 2026

Title 40 - Protection of Environment last revised: Dec 22, 2026

View all text of Subpart T [§ 141.500 - § 141.571]

§ 141.535 - What if my system uses chloramines, ozone, or chlorine dioxide for primary disinfection?

If your system uses chloramines, ozone, or chlorine dioxide for primary disinfection, you must also calculate the logs of inactivation for viruses and develop an additional disinfection profile for viruses using methods approved by the State.

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.

cite as: 40 CFR 141.535