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Authority: 42 U.S.C. 300f, 300g-1, 300g-2, 300g-3, 300g-4, 300g- 5, 300g-6, 300j-4, 300j-9, and 300j-11. Source: 40 FR 59570, Dec. 24, 1975, unless otherwise noted.
Note: For community water systems serving 75,000 or more persons, monitoring must begin 1 year following promulation and the effective date of the MCL is 2 years following promulgation. For community water systems serving 10,000 to 75,000 persons, monitoring must begin within 3 years from the date of promulgation and the effective date of the MCL is 4 years from the date of promulgation. Effective immediately, systems that plan to make significant modifications to their treatment processes for the purpose of complying with the TTHM MCL are required to seek and obtain State approval of their treatment modification plans. This note affects §§141.2, 141.6, 141.12, 141.24 and 141.30. For additional information see 44 FR 68641, Nov. 29, 1979.
Subpart B—Maximum Contaminant Levels
Subpart C—Monitoring and Analytical Requirements
Subpart D—Reporting and Record Keeping
Subpart E—Special Regulations, Including Monitoring
Subpart F—Maximum Contaminant Level Goals and Maximum Residual Disinfectant Level Goals
Subpart G—National Revised Primary Drinking Water Regulations: Maximum Contaminant Levels
Subpart H—Filtration and Disinfection
Subpart I—Control of Lead and Copper
Subpart J—Use of Non-Centralized Treatment Devices
Subpart K—Treatment Techniques
Subpart L—Disinfectant Residuals, Disinfection Byproducts, and Disinfection Byproduct Precursors
Subparts M - N—[Reserved]
Subpart O—Consumer Confidence Reports
Subpart P—Enhanced Filtration and Disinfection - Systems Serving 10,000 or More People
Subpart Q—Public Notification of Drinking Water Violations
Subpart T—Enhanced Filtration and Disinfection - Systems Serving Fewer Than 10,000 People
Subpart U—Initial Distribution System Evaluations
Subpart V—Stage 2 Disinfection Byproducts Requirements
Subpart W—Enhanced treatment for Cryptosporidium
Subpart X—Aircraft Drinking Water Rule
Subpart Y—Revised Total Coliform
Subpart Z—Control of Per- and Polyfluoroalkyl Substances (PFAS)
[63 FR 43846 Aug. 14, 1998; 63 FR 44526 Aug. 19, 1998]