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Regulations last checked for updates: May 21, 2025
Title 40 - Protection of Environment last revised: Apr 21, 2028
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Title 40
Chapter I
Part 133 - PART 133—SECONDARY TREATMENT REGULATION
§ 133.100 - Purpose.
§ 133.101 - Definitions.
§ 133.102 - Secondary treatment.
§ 133.103 - Special considerations.
§ 133.104 - Sampling and test procedures.
§ 133.105 - Treatment equivalent to secondary treatment.
source:
49 FR 37006, Sept. 20, 1984, unless otherwise noted.
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