---identifier: "/us/cfr/t40/s133.100"source: "ecfr"legal_status: "authoritative_unofficial"title: "40 CFR § 133.100 - Purpose."title_number: 40title_name: "Protection of Environment"section_number: "133.100"section_name: "Purpose."chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"subchapter_number: "D"subchapter_name: "WATER PROGRAMS"part_number: "133"part_name: "SECONDARY TREATMENT REGULATION"positive_law: falsecurrency: "2026-04-05"last_updated: "2026-04-05"format_version: "1.1.0"generator: "[email protected]"authority: "Secs. 301(b)(1)(B), 304(d)(1), 304(d)(4), 308, and 501 of the Federal Water Pollution Control Act as amended by the Federal Water Pollution Control Act Amendments of 1972, the Clean Water Act of 1977, and the Municipal Wastewater Treatment Construction Grant Amendments of 1981; 33 U.S.C. 1311(b)(1)(B), 1314(d) (1) and (4), 1318, and 1361; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217; 95 Stat. 1623, Pub. L. 97-117."regulatory_source: "49 FR 37006, Sept. 20, 1984, unless otherwise noted."cfr_part: "133"---
Identifier
/us/cfr/t40/s133.100
Currency
2026-04-05
Positive Law
No
Updated
2026-04-05
Chapter
Environmental Protection Agency
Authority
Secs. 301(b)(1)(B), 304(d)(1), 304(d)(4), 308, and 501 of the Federal Water Pollution Control Act as amended by the Federal Water Pollution Control Act Amendments of 1972, the Clean Water Act of 1977,... Secs. 301(b)(1)(B), 304(d)(1), 304(d)(4), 308, and 501 of the Federal Water Pollution Control Act as amended by the Federal Water Pollution Control Act Amendments of 1972, the Clean Water Act of 1977, and the Municipal Wastewater Treatment Construction Grant Amendments of 1981; 33 U.S.C. 1311(b)(1)(B), 1314(d) (1) and (4), 1318, and 1361; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217; 95 Stat. 1623, Pub. L. 97-117.
# 133.100 Purpose.This part provides information on the level of effluent quality attainable through the application of secondary or equivalent treatment.